3GSTU
Subscriber Terminal Unit
Installation Guide
redcare Helpline:
0800 671 240
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CE MARKING
The STU* carries the CE approval marking in accordance with the CE Marking
Directive 93/68/EEC. The STU complies with the following European Directives:-
73/23/EEC (Low Voltage Directives)
by compliance with safety specifications:EN60950
EN41003
User Safety
Network Safety
89/336/EEC (Electro Magnetic Compatibility Directive) as amended by 92/31/EEC
by compliance with EMC specifications:EN55022 Emissions Class B
EN50130-4 Immunity
99/5/EEC (Radio and Telecommunications Terminal Equipment Directive)
EN 50131-1 (Security grade 4, Environmental class 1)
*
STU = Subscriber Terminal Unit
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CONTENTS
INTRODUCTION ............................................................................... 4
Scope.............................................................................................. 4
Static Sensitive Devices ...................................................................... 4
Decommissioning Procedure ............................................................... 4
3GSTU OVERVIEW ............................................................................ 6
Specifications ................................................................................... 8
Safety.............................................................................................. 9
Power Supply.................................................................................... 9
Compatibility .................................................................................... 9
REN ................................................................................................ 9
INSTALLATION ................................................................................. 10
Training Courses ............................................................................... 10
Pre-Installation Requirements .............................................................. 10
Connecting the Telephone Line and Earth .............................................. 11
Mains Fail......................................................................................... 13
Tamper ........................................................................................... 13
Power Connection ............................................................................. 13
Alarm Inputs..................................................................................... 14
Output Relays................................................................................... 15
Control Output ................................................................................. 15
Return Path Signalling Output (RPS) ..................................................... 15
Line Fault Output .............................................................................. 16
Telephone Line Selection (LK1) ............................................................ 17
INSTALLING THE NVM ....................................................................... 17
Pin Alarm Polarity .............................................................................. 18
PROGRAMMING THE NVM ................................................................. 18
Input ............................................................................................... 19
Switch ............................................................................................. 19
STATUS INDICATORS ........................................................................ 24
STU Status LED Meanings................................................................... 25
SYSTEM COMMISSIONING ................................................................. 25
Testing the System ............................................................................ 26
Warranty ......................................................................................... 27
Repairs ............................................................................................ 27
TROUBLESHOOTING......................................................................... 28
Chirps ............................................................................................. 28
Equipment Compatibility Issues ........................................................... 28
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INTRODUCTION
Scope
This document is provided to support professional installation of the BT redcare
range of STU products:
Model
3GSTU-12V
3GSTU-24V
3GSTU-PLI
11zstu
fire stu-24S
fire stu-24A
fire stu-24C
fire stu-24G
Description
12 V supply, 8 pin alarms
24 V supply, 8 pin alarms
Plug-in
11 Zone, 11 pin alarms
24 V fire stu, 3 pin alarms (Standard build)
24 V fire stu, 3 pin alarms (ADT)
24 V fire stu, 3 pin alarms (Chubb)
24 V fire stu, 3 pin alarms (Gardiner)
Part No.
46600-12V
46600-24V
46600-PLI
46770
46600-24S
46600-24A
46600-24C
46600-24G
Static Sensitive Devices
Static electricity is present in our everyday lives. A static charge is generated by
friction, and whenever two dissimilar materials are separated. The imbalance of
electrons causes a potential difference of many hundreds of volts. On discharge,
a large current flows for a short time.
Many electronic components can be damaged by such static charges.
Component failure may not be immediate or catastrophic. Electro-Static
Discharge (ESD) can cause hidden damage to components, which will affect their
reliability.
It is recommended that precautions are taken against damage due to static
electricity during the installation and maintenance of the STU. Suitable ESD
protection measures include ensuring that you are earthed (via a wrist strap and
a 1 MO resistor) whenever you handle the unit.
Decommissioning Procedure
Important:
If the STU is in service, the Alarm Receiving Centre (ARC) must be contacted to
decommission it before it is power cycled. You must follow these
decommissioning instructions when there is a need to change the alarm system
settings:
1. Call the ARC and request they decommission the STU.
2. Wait for the ARC to confirm that the STU is decommissioned.
3. Turn off the power to the alarm system completely (i.e. switch off the mains
and disconnect the battery).
4. Make the desired changes to the alarm system.
5. Re-connect the battery and switch on the mains to re-apply power to the
STU.
6. Request the ARC re-commission the STU.
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7. Test the system (see page 26).
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3GSTU OVERVIEW
The 3GSTU is the Public Switched Telephone Network (PSTN) Subscriber
Terminal Unit for the BT redcare service. It is available in a number of variants:
3GSTU-12V
The 3GSTU-12V variant is a stand-alone unit for mounting inside an alarm
panel or auxiliary cabinet. This variant requires a 12 V d.c. supply. And has
8eight pin alarm terminals. The power supply, relay outputs and alarm
inputs are connected by means of hard wiring to the terminal blocks on the
3GSTU.
3GSTU-24V
Has the same functionality as the 3GSTU-12V but operates from a 24V d.c.
supply.
fire stu
Easily identified by the red plastics, the fire stu is a stand-alone unit for mounting
inside an alarm panel or auxiliary cabinet. This variant has only three pin alarm
terminals and a fixed Hard-ID, it requires a 24 V d.c. supply. The fire stu is
intended for use in fire alarm applications that have standardised on a 24 V d.c.
supply.
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3GSTU-PLI
The 3GSTU-PLI variant is a plug-in unit for mounting onto certain alarm panel
motherboards. With the exception of the Return Path Signalling, all power
supply, output and alarm input connections are made by two connectors that
protrude through the base.
The 3GSTU-PLI variant will fit the following alarm panels:
Scantronic
Scantronic
Castle Care-Tech
Modern Alarms
4700, 9100, 9600, 9800, (9500 II via adapter board).
808, 806, 840I
2300, 2500, 2700, 2900.
3000, 3200, 3400.
11zstu
The 11-Zone STU consists of a stand-alone base model 3GSTU with 8 alarm
channels plus an expansion board that provides connections for alarm inputs
9, 10 and 11. This expansion board also provides connection for AC Fail
input. (Note that it is NOT possible to add this board to an existing 3GSTU
to expand the number of zones).
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Specifications
Power supply requirements:
3GSTU-12V, 11zstu
Voltage:
10 V DC to 15 V DC
Current:
160 mA mean @12 V DC (For standby battery capacity)
Ripple/noise: 200 mV p-p max. (40 mA typical, all relays de-energised)
Low battery threshold (detected by 3GSTU-12V):
10.8 V ± 0.2 V
3GSTU-24V, fire stu
Voltage:
20 V DC to 28 V DC
Current:
160 mA max, (40 mA typ, all relays de-energised)
Ripple/noise: 200 mV p-p max
Low battery threshold (detected by 3GSTU-24x):
22.2 V ± 0.2 V
The 3GSTU-PLI variant supply requirements are:
12V Supply Voltage:
10 V DC to 15 V DC.
12V Supply Current:
80 mA typ
12V Supply Ripple/noise: 200 mV p-p max
5V Supply Voltage:
4.75 V DC to 5.25V DC
5V Supply Current:
30 mA typ
5V Supply Ripple/noise:
50 mV p-p max
Pin alarm inputs:
Logic High = +3.5 V to +30 V
Logic Low = -0.5 V to +0.8 V
Logic level outputs: (on sockets SK1 and SK2)
Logic High = 3.8 V @ 560 µA max
Logic Low = 0.4 V @ 280 µA max
These voltages are with respect to the 0V terminal on TB3
Relay contacts:
30 V, 1 A Max
Physical:
Size = 168 x 115 x 36 mm
Mass = 250 g
Environmental:
Operating ambient temperature +5° C to +40° C
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Safety
The circuit board area, under the cover, is classed as a Telecommunication
Network Voltage (TNV-3) circuit. All other interconnection points are classed as
Safety Extra-Low Voltage (SELV) circuits. It is only necessary for this cover to be
removed during installation of the PSTN wiring.
The host alarm panel or box into which the STU is installed must provide a
RESTRICTED ACCESS LOCATION and a FIRE ENCLOSURE in accordance with the
requirements of BS EN 60950.
It is essential that the STU is installed so that there is a gap of at least 5 mm
between it and any other part of the host equipment (excluding the mounting
face and plug-in connectors). If any part of the host apparatus uses or generates
voltages in excess of 250 V rms or dc, obtain advice from a competent
telecommunications safety engineer before you install the STU.
Power Supply
The STU must be connected to a suitable power supply. The installer must
ensure that the rating of the power supply is greater than the combined rating of
the STU and any other apparatus drawing power from the power supply.
The STU supply requirements are detailed on page 8.
Compatibility
The STU is designed for connection to either the Public Switched Telephone
Network (PSTN) or a Private Wire (RedDIRECT). It is also compatible with earth
calling lines.
It is NOT to be used with 1+1 carrier systems or a shared service.
The STU must NOT share a telephone line with other electronic data equipment,
such as a facsimile machine, EPOS terminal or digital communicator unless a
redcare Modem Compatibility Device (MCD) is used. (MCD cannot be used with
Private wire or Earth Calling lines.)
Only one STU may be connected to any one telephone line.
REN
The Ringer Equivalence Number (REN) for the STU is 1. As a guide to the number
of apparatus that can be simultaneously connected to a line, the sum of REN
values for each apparatus should not exceed 4.0. A BT provided telephone is
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assumed to have a REN value of 1.0 unless otherwise marked. If the STU is used
with an MCD, the combined REN will be 1½.
INSTALLATION
Training Courses
BT redcare offer a free training course for installers of the redcare service. For
further information call General Enquiries Tel: 0800 800 828
Pre-Installation Requirements
Before a STU installation can commence, a BT redcare Service Order must be
submitted to BT redcare by the Alarm Receiving Centre. This ensures that the
appropriate exchange connections have been made and a redcare block terminal
92A has been provided at the customer’s premises.
To enable an NVM to be programmed the following information is required:
a) The variant of STU is to be connected (-12V, -24V, -PLI, 11 zone or fire)
b) The alarm channels required and the function to be assigned to each
channel. The channels are typically assigned as follows:
For intruder alarm systems:
Channel 1
Channel 2
Channel 3
Channel 4
Fire
Personal Attack
Intruder
Opening/Closing
Channel 5
Channel 6
Channel 7
Channel 8
Optional
Optional
Optional
Engineer Test
For fire detection systems the fire stu has only three available channels
which can be used as required.
c) The polarity of the alarm inputs, positive applied or positive removed.
(Note: for a 3GSTU-PLI (plug-in) variant all alarm inputs must be positive
applied with the exception of alarm input 4 which must be positive
removed).
d) The type of line connection, PSTN (normal telephone line) or a Private
Wire (RedDIRECT)
e) The type of line monitoring function required
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Important:
THE ALARM SYSTEM MUST BE TOTALLY POWERED DOWN (SWITCH OFF
MAINS AND DISCONNECT THE BATTERY) BEFORE INSTALLATION CAN
COMMENCE.
For certain alarm panels, the 3GSTU-PLI can be directly mounted using the
"Plug-in" connections available. Locate it on the two 8-way connectors on the
control panel circuit board. Take care to align the pins to the sockets on the
board correctly: if they are out of alignment, damage may occur.
For other alarm panels and installations where “Plug-in” connections are not
available, the unit can be wired “stand-alone”. Fix the STU to the inside of the
control panel using the adhesive mounting pads provided after ensuring that the
control panel and STU base are free from dust or grease.
Care must be taken when connecting wires to the terminal blocks TB1,2,3,4 and
TB5. The small screws can be easily damaged by over-tightening. Wiring
connected to terminal blocks should be kept as short as possible to reduce the
likelihood of radio frequency (RF) pickup.
Connecting the Telephone Line and Earth
The TNV circuit cover of the STU should not be removed whilst the unit is
connected to the PSTN or Private Wire network.
Remove the TNV circuit cover from the STU.
Use two core telephone cable (type: 1/0.5 mm CW1308) that is not yet
connected to the PSTN or Private Wire (PW) network. Strip back the insulation
so that 5 mm of wire conductor is exposed. Position the cable in the plastic base
as shown on page 12. Connect one core to the terminal marked A and the other
to the terminal marked B.
Strip back an earth cable (green/yellow, core area greater than 1mm²) so that
5mm of wire is exposed. Position the cable in the plastic base as shown on page
12 and connect it to the terminal
marked
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The other end of this cable must be connected to a good electrical earth.
Failure to fit an earth cable will prevent proper operation of the unit and will
invalidate the warranty.
Replace the TNV circuit cover and secure in position with the screw.
Take the opposite end of the two core telephone cable and strip back both
cores so that 5 mm of wire is exposed. Connect both wires to the redcare
block terminal.
WARNING: the block terminal contains telecommunication network
voltages.
Please note that it is important to use the correct method of connecting the
STU to the BT Block Terminal 92A. The Block Terminal provides an
insulation displacement connection (IDC) block for the incoming phone line.
No connections, other than those made by BT, should be made to this IDC
block. The STU should be connected to the screw terminals as shown.
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Mains Fail
If an AC fail signal is provided from the power supply, this can be connected to
one of the pin alarm input terminals. For 11 Zone STU connect this to TB1-12,
in this case the AC fail alarm will not be indicated on the STU status LED.
Tamper
If a tamper signal is provided this can be connected to one of the pin alarm input
terminals. The tamper alarm can also be generated and sent to the ARC if the
STU itself detects a tamper, such as the removal of the NVM.
Power Connection
As stated at the beginning of the Installation section, the power supply must
be totally powered down (switch off mains and disconnect the battery) before
making these connections.
For 3GSTU-12V units, connect a 12 V DC power supply to TB3. Connect +12V to
the terminal labelled V+ and 0V to the terminal labelled 0V.
For 3GSTU-24V and fire stu units, connect a 24 V DC power supply to TB3.
Connect +24V to the terminal labelled V+ and 0V to the terminal labelled 0V.
If the STU is to be powered from a separate power supply, the “0V” terminal on
TB3 must be connected to the alarm panel common (0V) and the PSU 0V.
For 3GSTU-PLI units, power supply connections are made automatically when it is
plugged in to the host alarm panel.
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Alarm Inputs
For plug-in units, connections to the alarm panel are made by the two connectors
which protrude through the base. When fitting the unit, check that SK1 pins 1 to
8 and SK2 pins 9 to 16 correspond to pins 1 to 8 and 9 to 16 on the alarm panel.
The signal present on each pin is as follows:
SK1
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Function
Alarm Input 1
Alarm Input 2
Alarm Input 3
Alarm Input 4
Alarm Input 5 or 7 (see below)
Control Output
Not Used
Low battery (input)
SK2
Pin 9
Pin 10
Pin 11
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
Function
+12V
0V
Not Used
+5V
Not Used
Alarm Input 6
Line Fault (output)
Alarm Input 8
Alarm 5 can be transmitted as either channel 5 or channel 7. This is achieved by
fitting LK2 in either position 5 or 7. This link is not fitted on the stand alone units,
as alarms 5 and 7 can be transmitted independently.
For stand alone units, alarm inputs must be connected to the alarm panel
outputs. An eight way (three way for –24V) terminal block (TB1) is provided for
connection of the alarm inputs.
For 11zstu, alarm inputs for channels 9, 10, 11 and AC Fail are made at the
terminal block TB1 on the expansion board. Connections for alarm inputs 9, 10,
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11 and AC Fail are made to terminals marked 9 though 12 of TB1 respectively.
The connections are made in exactly the same way as for alarm inputs 1 to 8.
For panels which provide relay contact outputs, the common of each relay should
be connected to an A+ terminal (TB2) on the STU. Either the normally open or
normally closed contact should be connected to the relevant STU alarm input
(TB1). For example, if the relay is energised in the alarm state, connect the relay
Normally Open contact to TB1 for a positive applied alarm or connect the relay
Normally Closed contact to TB1 for a positive removed alarm. Note: The A+
terminal provides four 10KO pull up resistors to V+. If more than four are
required extra 10KO resistors should be connected, one end to V+ and the other
to the relay common.
For panels which provide voltage outputs, each alarm signal should be connected
directly to the relevant STU alarm input terminal (TB1).
Un-programmed channels can be left unconnected. If any channels have been
enabled in the NVM, but are unused, these should be connected the ‘No Alarm’
state. The ‘No Alarm’ state will be 0V for Positive Applied inputs and +12V (or
V+) for positive removed inputs. This will prevent alarms being generated on the
unused channels.
Output Relays
Three output relays are provided: Control, Return Path Signalling (RPS), and Line
Fault. The use of any, or all, of these functions is optional. For a basic
installation these outputs are not required.
Note: If an output is to be connected to a device which produces transient
voltages, such as a bell, the device should be suppressed using a suitable
protection diode.
Control Output
The Control Output is a general purpose output which is controlled by the Alarm
Receiving Centre. It may be used for various functions including the remote
resetting of alarm panels.
The ‘Control Output’ relay contacts (Normally Open, Common, Normally Closed)
are available for connection on terminal block TB4. The relay contacts have a
maximum current rating of 1 Amp.
For plug-in installations, Control Output connections are made automatically
when the unit is fitted in the host alarm panel. The host alarm panel must be
programmed to enable this function (TELL BACK).
Return Path Signalling Output (RPS)
The RPS output is used to indicate, at the protected premises, that the
opening/closing signal has been sent to and acknowledged by the Alarm
Receiving Centre.
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To use the RPS function, one of the alarm inputs must be designated as an
opening/closing channel (usually channel 4). The RPS output will activate when
an opening or closing signal is detected. It will de-activate when the opening or
closing signal has been acknowledged by the Alarm Receiving Centre. It is
allowable to have more than one input designated as an opening/closing channel,
but each must be acknowledged to de-activate the RPS output.
The RPS relay contacts (Normally Open, Common, Normally Closed) are available
for connection on terminal block TB4. To use this option, a warning device such
as a piezo bleeper or external strobe light should be connected as shown below.
The maximum current rating of the relay contacts is 1 Amp.
Line Fault Output
The Line Fault output is used to indicate, at the protected premises, that there is
a fault with the telephone line and/or communications with the redcare system
have been lost.
For stand alone units, the ‘Line Fault’ relay contacts (Normally Open, Common,
Normally Closed) are available for connection on TB4. The maximum current
rating of the relay contacts is 1.0 Amps.
For 3GSTU-PLI units, Line Fault connections are made automatically when it is
fitted into the host alarm panel. The host panel must be programmed to accept
this function.
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The STU provides two different modes of local line monitoring, which can be
selected when the NVM is programmed. The ARC must be notified if local line
monitoring is to be enabled, and if so, which mode is required.
For STUs connected to normal phone lines, ‘PSTN mode’ should be used. This
mode monitors the DC line voltage and triggers the Line Fault output within 100
seconds of a line break.
For STUs connected to private wires (RedDIRECT), ‘Private Wire mode’ should be
used. This mode causes regular ‘chirps’ on the line and triggers the Line Fault
output within 3 minutes of a line break.
In both PSTN and Private Wire modes, the Line Fault output will be triggered
within 40 seconds if the STU has an alarm to transmit but cannot communicate
with the redcare system.
Telephone Line Selection (LK1)
The STU is supplied ready to connect to the Public Switched Telephone Network
(LK1 is not fitted). If the STU is to be connected to a Private Wire (RedDIRECT) a
suitable link must be fitted in the position marked LK1. An NVM chip must be
configured for PW use and fitted in accordance with the procedure on page 17.
If you have any doubts about the type of telephone line to which the STU is being
connected, contact BT redcare for advice.
INSTALLING THE NVM
The NVM (Non-Volatile Memory) chip is a device used by the STU to store
configurable parameters. This memory is retained even when the power is
completely removed.
There is a socket provided (at IC2) for the fitting of a pre-programmed NVM.
Suitable NVMs for use with the STU are National Semiconductor NM93C46N or
Microchip Technology 93C46/P.
The NVM can be supplied pre-programmed by the ARC or the NVM can be
manually programmed using a Scantronic 7200 NVM programmer (version 1.2 or
1.3 software) or a Scantronic 7300 NVM programmer (version 1.3 software).
Once fitted, the NVM can be re-programmed after careful removal using an IC
extractor. If the unit has already been commissioned, see the note on page 4.
The STU and alarm system must be totally powered down (switch off mains
power and disconnect the battery) before fitting or removing the NVM.
Note the orientation of the device shown below and make sure it is fitted the
correct way around.
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Pin Alarm Polarity
The pin alarm channels respond to the voltage level at the terminal block inputs
(stand-alone mode) or the pins of SK1 and SK2 (plug-in mode). The appropriate
terminal block inputs and plug-in connector socket pins are tracked together in
parallel on the circuit board. Each channel can be programmed to be "Positive
Applied" or "Positive Removed". This polarity is set in the NVM.
PROGRAMMING THE NVM
For 11zstu, the NVM programming does not affect the functions of alarm
channels 9, 10, 11 and AC Fail. The extra alarm inputs are configured by DIP
switches on the expansion board. All unused alarm inputs must be disabled. For
all enabled alarm inputs, the correct polarity must be selected. Alarm inputs 9,
10 11 and AC Fail cannot be selected as opening/closing channels.
Switches at SW1 are used to enable or disable and to select the polarity of the
extra alarm inputs. The function of each switch is indicated in the table below.
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Input
9
10
11
AC Fail
Switch
1
2
3
4
5
6
7
8
Off
Negative Applied
Disabled
Negative Applied
Disabled
Negative Applied
Disabled
Negative Applied
Disabled
On
Positive Applied
Enabled
Positive Applied
Enabled
Positive Applied
Enabled
Positive Applied
Enabled
Remote Programming
Once installed, the NVM can be re-programmed remotely by the ARC. Only
the relay states can be adjusted unless a technician is on-site to set the STU
into Secure Access Mode using LK3. Remote NVM programming is not
available on the 11zstu or on older units that do not have LK3 fitted.
Contact BT redcare for more information.
Manual Programming
NVMs can be programmed using a Scantronic 7200 or 7300 NVM
programmer.
Apply power to the programmer (12 V DC or 12 V AC.) and set the on/off
switch to position "0".
Insert the NVM in the socket marked ‘COPY NVM’. Ensure that the dot on
the NVM lines up with the white dot on the programmer.
Set the on/off switch to position ‘1’ and wait for the programmer to display
its version information and follow the instructions below:
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V1.3
# 001957
Press
YES
and the screen displays:
MASTER NONE
COPY
9314/C46
Press
YES
and the screen displays:
SIMPLE 8400,8440,9056 PROGRAMMING
No
Press
once, or twice for 7300, until the screen displays:
READ/MODIFY COPY SOCKET DATA
Press
YES
and the screen displays:
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Press in sequence:
A
3
2
D
The address display changes to:
0032
If the Control Relay is to be energised
on power up press ………………………………..
1
or
If the Control Relay
is to be not energised on power up press …….
0
If the Line Fault Relay is to be energised
when the landline has failed, press ………………
1
If it is to be not energised when the landline
has failed, press ……………………………………
Press….
YES
or
0
to advance the address display to:
0033
If the Telephone Line Type is PSTN press ….
0
If it is a private wire press ……………………..
1
or
(Different key presses may be required to overcome certain equipment
compatibility problems: see page 28.)
For normal Line Monitoring mode press …….
1
For Earth Calling mode press …………………
2
or
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YES
Press……..
to advance the address display to:
0034
0
For all variants Press …………….
A
Press in sequence:
4
7
D
The address display changes to:
0047
Key in the first two digits of the hard ID, press yes and key in the final two digits.
(This address is ignored in 3GSTU-24x as the hard ID is fixed in ROM)
For example, a hard ID of 0567 would be entered:
0
5
YES
Press in sequence:
6
A
7
6
0
B
The address display changes to:
0060
Use keys
1
to
8
to set the polarity of alarm pins 1 to 8.
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Pressing the numbered key changes the setting of the polarity from 0 to 1, or 1
to 0. A state of 1 means positive applied and a state of 0 means positive
removed.
A
Press in sequence:
6
6
B
The address display changes to:
0066
Use keys
1
to
8
to select the pins that are opening/closing
channels. A state of 1 means that the alarm pin is an opening/closing channel a
state of 0 means that it is not an opening/closing channel.
A
Press in sequence:
7
0
B
The address display changes to:
0070
Use keys
1
to
8
to designate alarm pins that are enabled.
A state of 1 means the pin is enabled and a state of 0 means the pin is disabled.
For fire stu channels 4 to 8 must be disabled.
The NVM is now completely programmed. Set the power switch to 0, remove the
programmed NVM and insert it in the STU at position IC2 (see page 18).
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STATUS INDICATORS
LED
1 (green)
2 (red)
Indication
STU Status 1
STU Status 2
Normal state
Intermittent flash
Off
Key to LED flash rates:
Slow
About 21/2 s on, 21/2 s off.
Fast
About 1/3 s on, 1/3 s off.
Flutter
About 12 flashes per second.
Intermittent
One or more flashes about 1/3 s on and then off for more than 21/2 s.
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STU Status LED Meanings
The status of the 3GSTU is indicated on the LEDs in priority order - highest first.
Where a high priority condition exists, it is indicated on the LED and suppresses
the indication of lower priority conditions.
For example, if a battery low condition is present, battery low is indicated on the
red LED regardless of the state of AC Fail.
Green flutter flash for 2/3 s:
Transmitting or receiving alarm data over landline (chirp).
Green fast flash:
Battery power is low. Battery low is indicated on the LED as soon as it is
detected. The battery low alarm is only transmitted after a delay.
Green slow flash:
The STU has been commissioned by the ARC.
Green permanently off:
STU is not powered.
Red permanently off:
Normal
Red fast flash:
The STU has detected an NVM configuration error.
Red flutter flash:
STU has one or more alarms or openings/closings present.
The LED flashes once for each unacknowledged alarm on pins 1 to 8 (1 to 11 for
11zstu) and is then off for a few seconds.
SYSTEM COMMISSIONING
Note 1: The STU should not be commissioned if a data device is busy using the
telephone line.
Note 2: If an MCD is fitted it will disconnect the telephone or data device
connected through it during commissioning.
Apply power to the alarm panel and the STU and observe the status indicators.
The red and green LEDs will slow flash together (on for 2.5 seconds approx. and
off for 2.5 seconds approx.).
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26
During the commissioning procedure, the STU will be "upped" on the landline.
Call the ARC, preferably using the same line as the STU, and ask them to
commission the system ("Up the STU").
You will hear a short series of ‘chirps’ on the line. The green STU Status LED
will give a short flutter each time a landline message, heard as a "chirp", is
sent or received.
When the ARC confirms that the system is commissioned the green STU Status
LED should flash every 5 seconds. The red STU Status LED may either be off, or
produce short flashes every 10 seconds. The short flashes indicate the number of
alarms triggered.
If, during the commissioning procedure, power to the STU is interrupted, even
momentarily, the above procedure will have to be repeated.
Testing the System
Once the STU has been commissioned, all of the used alarm inputs and relay
outputs should be tested. To test the alarm inputs you must be in contact
with the ARC.
Each alarm should be tested in the following manner:
a) Trigger the alarm (the red STU Status LED should give one quick flash
every 10 seconds signifying one alarm has been triggered).
b) Ask the ARC to confirm that it has received the alarm message.
c) Ask the ARC to acknowledge the alarm.
d) Remove the alarm trigger (the red STU Status LED should stop
flashing).
e) Ask the ARC to confirm that it has received the reset message.
f) Ask the ARC to acknowledge the reset.
If personal attack buttons form part of the system they must be tested as
above.
If used, the Control Output should be tested as follows:
a)
b)
c)
d)
Ask the ARC to turn on the Control Output.
Confirm that Control Output is activated (e.g. Remote Reset).
Ask the ARC to turn off the Control Output.
Confirm that the Control Output is deactivated.
If used, the RPS output should be tested as follows:
a) Trigger the alarm that has been designated as the opening/closing
channel.
b) Confirm that the RPS warning device is activated and ask the ARC to
confirm that it has received the opening message.
c) Ask the ARC to acknowledge the opening.
d) Confirm that the RPS warning device is de-activated.
If enabled, the Line Fault output should be tested as follows:
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27
a) Disconnect the STU from the telephone line (both A and B connections).
b) If the STU is connected to the PSTN, the Line Fault output will activate
within 100 s.
c) If the STU is connected to a Private Wire (redirect) or a PSTN earth calling
line, the Line Fault output will activate within three minutes.
d) Reconnect the telephone line and verify that the Line Fault relay is deactivated.
When all of the above tests have been successfully completed, all the alarm
triggers should be removed and the ARC asked to acknowledge all of the
unacknowledged alarms. The STU red LED should be off and the green LED
should produce a short flash every 5 seconds. This signifies that the STU is
commissioned and there are no outstanding alarms.
Warranty
The warranty covers defects in materials and workmanship. The warranty is
invalidated by misuse or neglect by the customer and defects caused by improper
installation or operating practices. Damage such as that caused by lightning or
inadequate return packaging will also void the warranty. In no event shall BT
redcare be liable for any consequential damage.
Repairs
All STUs sent for repair must be returned via the distributor from which they were
purchased and NOT direct to BT redcare . The NVM must be removed from the
STU before it is returned for repair.
All non warranty repairs are charged at a standard fixed price plus a shipping
charge and VAT.
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28
TROUBLESHOOTING
This section describes typical problems that may arise, the symptoms, possible
causes and solutions. If you have problems that you cannot resolve after
consulting this section, please contact BT redcare Technical Helpline Freephone:
0800 671 240.
Chirps
The redcare system utilises an existing telephone line to provide a secure
communications link between the alarm system at the protected premises and
the ARC.
To facilitate this, two modes of communication are employed: a continuous
inaudible low-tone, normally present all the time, and an audible ‘chirp’, used to
transmit alarm messages and check for the presence of the STU.
These ‘chirps’ will not normally be heard, but they can occasionally occur as the
telephone handset is lifted. This ‘chirp’ should be heard only once. If ‘chirps’ are
heard regularly during conversation, please contact BT redcare for advice.
Equipment Compatibility Issues
Certain compatibility issues with specific equipment can be overcome by
changing the low-tone signalling level output from the STU. Only where advised
by BT redcare , the low-tone attenuation setting can be changed by reprogramming the NVM. The NVM address concerned is number 33 which also
contains the line monitoring mode setting. The options available are shown on
page 29.
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29
Line
Type
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PSTN
PW
PW
PW
PW
PW
PW
PW
PW
Earth
Calling
Line
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
On
Hook
Atten.
0 dB
0 dB
0 dB
0 dB
-3 dB
-3 dB
-3 dB
-6 dB
-6 dB
-9 dB
0 dB
0 dB
0 dB
0 dB
-3 dB
-3 dB
-3 dB
-6 dB
-6 dB
-9 dB
0 dB
0 dB
-3 dB
-3 dB
-6 dB
-6 dB
-9 dB
-9 dB
Off
Hook
Atten.
0 dB
-3 dB
-6 dB
-9 dB
-3 dB
-6 dB
-9 dB
-6 dB
-9 dB
-9 dB
0 dB
-3 dB
-6 dB
-9 dB
-3 dB
-6 dB
-9 dB
-6 dB
-9 dB
-9 dB
0 dB
0 dB
-3 dB
-3 dB
-6 dB
-6 dB
-9 dB
-9 dB
Data
Value at
Address 33
21
01
31
41
51
61
71
81
91
A1
22
02
32
42
52
62
72
82
92
A2
11
12
D1
D2
E1
E2
F1
F2
Bit Value
00100001
00000001
00110001
01000001
01010001
01100001
01110001
10000001
10010001
10100001
00100010
00000010
00110010
01000010
01010010
01100010
01110010
10000010
10010010
10100010
00010001
00010010
11010001
11010010
11100001
11100010
11110001
11110010
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30
Symptom
Red STU Status
LED
Fast flash.
When an alarm is
triggered the
number of
outstanding
alarms does NOT
increase.
The red STU
Status LED is off
or the number of
flashes of the red
LED stays the
same. The
green STU
Status LED
intermittent
flash.
The red STU
Status LED
flashes up to
eight times after
every other flash
of the green STU
Status LED.
Green STU
Status LED fast
flash.
Possible Causes
Problems indicated on
a) NVM not fitted.
b) NVM
unprogrammed.
c) NVM wrong way
around.
d) NVM leg bent
under.
e) The NVM has been
removed from the
STU.
Possible Solution
the STU Status LEDs
a), b), c) Insert correctly programmed
NVM.
a) An alarm previously
transmitted on the
same channel has not
been acknowledged
by the ARC.
b) The NVM has been
incorrectly
programmed and the
alarm channel has
been disabled by
mistake.
a) Ask the ARC to acknowledge any
outstanding alarms.
Each red LED flash
represents an
outstanding alarm.
a) Alarm input/s may
be incorrectly wired.
b) Alarm information
may be programmed
incorrectly in the
NVM.
Power supply and/or
battery voltage is too
low.
a) Check/correct the alarm input wiring.
d) Refit NVM.
e) Power down, insert the NVM and reapply power to the STU. Ask the ARC
to commission the STU again.
b) Re-program the NVM.
b) i) Re-configure alarm settings.
ii) Re-program the NVM.
Check the operation of the power
supply. Check that the back up battery
is charged.
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31
Symptom
ARC cannot
commission the
STU, and the
phone line is
otherwise OK.
Green and red
Status LEDs
slow flash.
ARC is reporting
NO RESPONSE
and chirps can
be heard on the
phone line.
Green and red
STU Status LED
slow flash.
ARC is reporting
NO RESPONSE
and chirps
CANNOT be
heard on the
phone line.
(Green STU
Status LED slow
flash.)
Possible Causes
a) STU is not enabled
by BT Redcare.
b) Wrong phone line
being used.
c) Wrong STU
commissioned by the
ARC.
Possible Solution
a), b), c) Seek assistance from the ARC.
There has been a
momentary power
failure in the control
panel.
Ask the ARC to commission the STU
again.
There is a failure of
the phone line.
Report the failure to your local BT fault
repair service. Phone 151 for residential
customers.
Phone 154 for business and RedDIRECT
customers.
Problems NOT indicated by the LEDs
The alarm panel The line fault output
Re-program the NVM.
is in a permanent has been
local line fault
programmed to the
condition.
wrong polarity.
Regular ‘chirps’
PABX or telephone
Report make and model details to BT
are heard (every compatibility
redcare Helpdesk and ask for advice.
2 minutes) when problems
ever the
telephone is in
use
a) This is an internal
Re-configure the NVM.
The ARC is
reporting the
alarm generated by
the STU to indicate a
receipt of a
channel 12 alarm tamper condition.
but tamper pin is b) The NVM has been
not active.
removed from a
commissioned STU.
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32
Symptom
The ARC is
reporting the
receipt of a
channel 14
alarm.
No activity on
the STU, no
LEDs on.
Regular ‘chirps’
are heard (every
2½ to 3 minutes)
whenever the
telephone is in
use.
Calls cannot be
made from the
STU phone line.
The ARC is
reporting the
receipt of a
channel 15
alarm.
Possible Causes
This is an internal
alarm generated by
the STU to indicate a
battery low condition.
Possible Solution
Possible mains failure or faulty battery.
The power is off.
Check for 12V dc at TB3 V+
with respect to TB3 0V
The NVM has been
programmed for
Private Wire mode
and the STU is
connected to a
normal phone line
(PSTN).
a) LK1 fitted when
STU is connected to
the PSTN.
b) Incorrect phone
line wiring to the
STU.
c) Faulty wiring at the
redcare block
terminal.
d) Faulty phone line.
Re-program the NVM for ‘PSTN mode’.
This is an internal
alarm generated by
the STU to indicate a
self test failure.
The STU has detected a fault in its
internal circuitry. Replace the STU.
a) Remove LK1.
b) Check and correct the wiring.
c) Seek assistance from the ARC.
d) Report the fault to your local BT fault
repair service.
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Offices worldwide
The telecommunications services described in this publication are subject to availability and
may be modified from time to time. Services and equipment are provided subject to British
Telecommunications plc’s respective standard conditions of contract. Nothing in this
publication forms any part of any contract.
© 2004 British Telecommunications plc.
Registered office: 81 Newgate Street, London EC1A 7AJ
Registered in England No: 18000000
Produced in England
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