Sensor radio manual

BENTEK SYSTEMS LTD
SCADA and Telemetry Solutions
SCADALink Sensor Radio
SR-900T / SR900R
Wireless Simplex I/O Controller
User Manual
Version V1.06 for SCADALink SR-900T / SR-900R
(Last revised Mar 8, 2012)
BENTEK SYSTEMS LTD
315 – 3750 46th Ave. S.E. Calgary, Alberta, Canada T2B 0L1 Ph: (403) 243-5135 Fax: (403) 243-5165
email: support@scadalink.com
web: www.scadalink.com
BENTEK SYSTEMS LTD
SCADALink SR-900T / SR-900R
SCADA and Telemetry Solutions
SR-900T Transmitter
SR-900R Receiver
Transmit Power..........1 Watt
Range......................4-5 Miles (Omni) , >15 Miles
Yagi (L.O.S.)
Frequency................902 - 928 MHz
Technology...............Frequency Hopping Spread
Spectrum
Input Power..............12VDC to 30VDC (Regulated)
Power Consumption...3 Watts (125mA @ 24VDC)
Temp Range.............-40C to 70C (-40F to 158F)
Inputs......................1 x 4-20mA analog (250 ohm
input impedance)
2 x +5 to +30VDC Digital
Dimensions..............4" x 4.5" x 0.7"
Mounting..................Din Rail
Environmental...........NEMA1
Approvals................Class 1 Div 2
Antenna Connector.MCX (Female)
Frequency...............902 - 928 MHz
Technology..............Frequency Hopping Spread
Spectrum
Input Power..............12VDC to 30VDC (Regulated)
Power Consumption...8.4Watt Peak
1.8Watts Average
(350mA@24VDC Peak,
75mA@24VDC Average)
Temp Range.............-40C to 70C (-40F to 158F)
Outputs....................1 x 4-20mA analog (12 Bit
Resolution)
3 x Dry Contact Output 0.5A,
120VAC Max
Max Loop Impedance..450 to 1350 ohms for power
supply voltages of 12VDC to
30VDC
RSSI..........................0-5VDC on RSSI Pin
Dimensions...............4" x 4.5" x 0.7"
Mounting....................Din Rail
Environmental............NEMA1
Approvals.................Class 1 Div 2
Antenna Connector..MCX (Female)
Description Of Operation:
The SR-900T Transmitter comes with 1 Analog & 2 Discrete inputs. Inputs on the Transmitter
are replicated as matching outputs on the SR-900R Receiver. The Receiver also has a "Link"
Dry Contact output which can be used to shutdown equipment if there is a Link Failure.
NOTE: Each Sensor Radio Transmitter SR-900T is factory configured to send out one internal
address code while each Receiver SR-900R is factory configured to decode only one address
code. SCADALink Sensor Radios usually ship as a matching Transmitter / Receiver pair with
that Receiver's address matched to the Transmitters. The User has no ability to configure these
addresses so Transmitters and Receivers cannot be arbitrarily mixed.
Typical End-to-End Application
Sensor Radios are usually used for End-to-End I/O applications to get I/O from one site to another. They
are often used as a cost effective replacement for Running Conduit and Trenching.
4-20mA in to
Transmitter Module
Discrete Input 1
Discrete Input 2
Bentek Systems Ltd.
Sensor
Radio
Transmitter
Module
1 Analog Signal + 2 Discretes Up To
20 Miles
Analog Output
Sensor
Radio
Receiver
Module
Digital Output 1
Digital Output 2
Link Output
Version V1.06 for SCADALink SR-900T / SR-900R
BENTEK SYSTEMS LTD
SCADALink SR-900T / SR-900R
SCADA and Telemetry Solutions
Applications with Multiple Receiver Sites:
Sensor Radios can also be used in systems with a single Transmitter transmitting to multiple
Receivers keyed to the same Transmitter. This allows the inputs at the Transmitter to be replicated
at all the Receivers. Typical applications are in Pump Control and Shutdown Systems.
Pump On/Off Control:
SR900T
SR900R
Digital Output 1
SR900R
Discrete Input 1
Tank Hi Level
Digital Output 2
Digital Output 1
Discrete Input 2
Tank Lo Level
Digital Output 2
Shutdown System:
Digital Output 1
Digital Output 2
...
SR900R
SR900T
Emergency
Shutdown
...
Discrete Input 1
Tank Hi Level
Discrete Input 2
Tank Lo Level
SR900R
Digital Output 1
Digital Output 2
Bentek Systems Ltd.
Version V1.06 for SCADALink SR-900T / SR-900R
BENTEK SYSTEMS LTD
SCADA and Telemetry Solutions
SCADALink SR-900T / SR-900R
SR-900T Radio Transmitter Wiring Diagrams
Power Supply
12VDC to
30VDC
GND
+
_
PWR
Two Wire Loop
Powered Transmitter
TX
+VDC
IN
SR-900T
Transmitter
Discrete Input 1
Digital Inputs Common
Discrete Input2
Power Supply
12VDC to
30VDC
Three Wire
Transmitter
TX
+
_
GND
GND
+VDC
PWR
IN
4-20mA GND
SR-900T
Transmitter
Discrete Input 1
Digital Inputs Common
Discrete Input 2
GND
Power Supply
12VDC to
30VDC
Externally Powered
4 Wire Transmitter
+
_
TX
+VDC
+
_
IN
4-20mA GND
Discrete Input 1
_
+
Bentek Systems Ltd.
SR-900T
Transmitter
Digital Inputs Common
Discrete Input 2
Version V1.06 for SCADALink SR-900T / SR-900R
BENTEK SYSTEMS LTD
SCADALink SR-900T / SR-900R
SCADA and Telemetry Solutions
SR-900T Radio Transmitter Wiring Diagram
Loop Pwr Out 7
4-20mA Input 8
Loop Gnd 9
Discrete Input 1 10
SR-900T
Transmitter
4
Discrete Input Gnd 11
5
Discrete Input 2 12
MCX (Female)
6
12-30VDC
Ground (For Power and 4-20mA)
N/C
SR-900T Transmitter LED's
RF LED: Solid Green when functioning normally.
LED's 1 and 2 show status of digital inputs 1 & 2. Solid Green = ON.
N/C: No Connection
WARNING: EXPLOSION HAZARD
Do not disconnect equipment unless power has been
switched off or the area is known to be non-hazardous.
Bentek Systems Ltd.
Version V1.06 for SCADALink SR-900T / SR-900R
BENTEK SYSTEMS LTD
SCADALink SR-900T / SR-900R
SCADA and Telemetry Solutions
SR-900R Radio Receiver Wiring Diagram
Discrete
Output 1
7
1
8
2
9
10
Discrete
Output 2
SR-900R
Receiver
Link Output
3
4
11
5
4-20mA Output
Ground (For Power and 4-20mA)
12
MCX (Female)
6
12V-30VDC
SR-900R Receiver LED's
RF LED Blinks once every 2 seconds when transmitter is OFF or out of range.
RF LED Blinks rapidly when marginal signal is being received.
RF LED is solid when a secure link is established.
LED's 1 & 2 show status of digital inputs 1 & 2. Solid Green = ON.
FCC: This device complies with Part 15 of the FCC rules. Operation is subject to
the following 2 conditions:
1. This device may not cause harmful interference.
2. This device must accept interference received, including interference that
may cause undesired operation.
Changes or modifications not expressly authorized by Bentek Systems Ltd. could
void the user's authority to use the equipment. The system integrator may only use
antennas that have been tested and approved with this radio to maintain the FCC
approval. If a system integrator uses non-approved antenna they are responsible
for obtaining their own FCC certification.
WARNING: EXPLOSION HAZARD
Do not disconnect equipment unless power has been
switched off or the area is known to be non-hazardous.
Bentek Systems Ltd.
Version V1.06 for SCADALink SR-900T / SR-900R
BENTEK SYSTEMS LTD
SCADALink SR-900T / SR-900R
SCADA and Telemetry Solutions
RSSI Chart vs. Voltage
115
110
105
Signal Loss (-dB)
100
95
90
85
80
75
70
0.5
1.5
2.5
3.5
Voltage (V)
RSSI is a Receiver pin that indicates the Receiver's received signal strength. It is measured by placing
the probes of a voltmeter (on a DC Voltage setting) between the RSSI pin and GND. A value of 2.5V or
greater is required for proper Receiver operation while a value less than 2.5V will result in potentially
unreliable radio operation. If RSSI is below 2.5V, Signal strength at the Receiver can be increased by:
1. using a higher gain antenna
2. better antenna orientation to Transmitter (if Receiver antenna is a directional antenna)
3. moving antenna to a higher elavation (or increasing height of antenna tower)
4. moving antenna to a location where there are fewer obstructions.
Bentek Systems Ltd.
Version V1.06 for SCADALink SR-900T / SR-900R
BENTEK SYSTEMS LTD
SCADA and Telemetry Solutions
SCADALink SR-900T / SR-900R
Antenna and Antenna Connections
Both SR-900T and SR-900R require connection to an antenna for normal operation.
Bentek can supply two types of antennas:
1. MCX (Male) Unity Gain Omni Antenna assembly
This is a small Omni Antenna that has a short 1 meter length of MCX cable that plugs directly into
the unit. One antenna on each side provides a range of approximately 1 mile Line of Sight (LOS)
2. 6dB YAGI Antenna
A 6 dB YAGI Antenna at each end provides an approximately 20 mile range LOS. A pigtail adapter
cable (MCX Male to N) is required to connect to a normal YAGI.
Bentek Systems Ltd.
Version V1.06 for SCADALink SR-900T / SR-900R