Novus Programmable Timer NT240 Manual
NT240 TIMER
PROGRAMMABLE TIMER – INSTRUCTIONS MANUAL V20x A
INTRODUCTION
The NT240 is a programmable timer designed to monitor time
intervals, activating its outputs according to some predefined mode of
operation and time intervals chosen by the user. The user can also
create its own mode of operation to best fit his application.
The timer shows the elapsed time in an increasing or decreasing
mode, with resolutions from 0.01 s to 1 hour.
Digital inputs are available to perform specific functions. Standard
outputs are relay and logic pulse (5 V) types.
SPECIFICATIONS
Input types: - NPN/PNP sensors
- NO/NC dry contact
- Voltage: Logic level 1: 5 to 30 Vdc
Logic level 0: -0.5 to 0.5 Vdc
Output: - 1 SPST Relay 3 A / 250 Vac (3 A / 30 Vdc)
- 1 voltage pulse 5 V / 25 mA
Time delay after turning on the timer: 200 ms
Accuracy: 0,1 % of displayed time
Response time: 10 ms for the relay output and 0.3ms for the pulse
output
Auxiliary voltage source: 12 Vdc ±10 % / 50 mA
Power: 100 to 240 Vdc/ca, 50/60 Hz or 24 Vdc/Vac, 50/60 Hz
Maximum consumption: 3 VA
Operating environment: 0 to 55 ºC, Relative humidity (maximum): 80 %
up to 30 ºC. For temperatures above 30 ºC, decrease 3 % per ºC.
Dimensions: 48 x 48 x 106 mm
Cut for panel fixation: 45.5 to 45.5 mm
Approximate weight: 150 g
TIMER INPUTS
The timer has three control inputs: START, HOLD and RESET.
These inputs can be configured to accept four different electrical
(logical) signals (see parameter PnP in the configuration). The signal
type there defined becomes the same for all three inputs.
START: Starts time counting
The start input, when activated, starts the temporization cycle, using
the operating mode selected in the configuration. The START input is
available on terminals 9 and 12.
HOLD: Interrupts time counting
The HOLD input, while active, interrupts time counting. When the
HOLD input is released, the time counting resumes from the point it
was interrupted.
NOTE: The HOLD function can activated by the F key, when
programmed to perform as such on the F Fv parameter of the timer.
Using the F key as the input to HOLD function, pressing once
stops the timer and pressing again resumes the counting of time.
RESET: Timer Input Reset
The Reset input, when activated, cancels the current temporization
and returns the timer display to the initial value. While Reset is
active, the temporization can not be started. When Reset is released,
the timer becomes available for new temporization.
TIMER OUTPUTS
The timer provides an output, called TIMER OUTPUT, which can be
activated in various ways according to the selected temporization
mode. This output is available as a relay contact and as a voltage
pulse (both operate simultaneously).
Output types: 1 SPST – 3 A / 250 Vac relay, terminal 3 and 4;
1 voltage pulse of 5 V / 25 mA, terminals 5 and 6
Output delay time: 10 ms for relay output;
0.3 ms for pulse output.
The 0Per parameter defines the way the output will operate.
AUXILARY SUPPLY OUTPUT
A 12 Vdc ±10 % (50 mA max) auxiliary power supply is provided on
terminals 7 and 8 to power electronic sensors used as inputs to the
timer. The (-) supply terminal is wired internally to the GND terminal
of the inputs (the supply is not electrically isolated from the
inputs).
INSTALLATION
Panel Mounting
Insert the unit into the panel cut-out (use the dimensions specified in
the "Technical Specifications" section) and slide the mounting clamp
from the rear to a firm grip at the panel.
The timer circuitry can removed from its case from the front, without
the need of disassembling the instrument from the panel, leaving the
wire connections intact.
Electric connections
Figure 01 shows the timer terminals along with theirs functions.
Figure 01 – Timer connections panel
Recommendations for Installation
• Input signal wires should be laid out away from power lines and
preferably inside grounded conduits.
•
•
Instrument mains should be suitable for this purpose and wires
should not be shared with high consumption motors and inductors.
Use of RC filters (47 Ω and 100 nF) in parallel with solenoids and
contactor coils are highly recommended.
1/5
Timer NT240
•
In monitoring and control applications it is essential to consider
what can happen when any part of the system is subject to failure.
Connections of the input signals
The type of signal to be applied to the inputs is determined by the
user in the PnP parameter of the timer. The signal type must be the
same for the three inputs (Start, Hold and Reset).
Sensors with NPN/PNP open collector output:
Common to most proximity sensors, must be connected as indicated
in Figure 02. The PnP parameter must be set to 0 for NPN sensor
output and to 1 for PNP.
Levels structure:
1 Indication of elapsed time
Shown on power-up;
2 Setpoint level (temporization setpoints)
To enter, press P for 4 seconds;
3 Configuration level.
Press P for 8 seconds;
4 Custom Operating mode level.
Press P for 12 seconds;
To enter into deeper levels, press the P for the time required by
the level and when the timer shows the first parameter of that level,
simply release the P key to stay in that level. Other parameters in
that level are accessed by pressing the P key.
To modify the value of a parameter use the
keys for
and
incrementing or decrementing the value, respectively. After the last
parameter of the cycle is reached, the timer returns the main screen
(Indication of Elapsed time).
Figure 02 – Connecting PNP/NPN type sensor
- Signal from relay or switch (dry contact):
Wire dry contacts as shown on Figure 03. For this type of input,
configure PNP = 0.
Figura 03 - Conectando contato seco (relé, interruptor)
- Voltage input signal
Refer to the “Specifications” section for the input voltage levels
compatible with the timer. Figure 04 shows the wiring scheme.
When PNP = 1, the timer recognizes the rising edge of the pulse
For the recognition of the falling edge, set PnP = 0.
The modified values are stored in a non-volatile memory when the
P key is pressed to move to the next parameter.
PROGRAM SECURITY
To avoid tampering, parameter “Prot” and a hardware jumper can
be used to disable access to programming parameters.
With the jumper in the OFF position, all program levels are
unprotected. The “Prot” parameter can only be changed with the
jumper in the OFF position.
With the jumper in the ON position or removed, the protection level
is defined by the current value of the “Prot” parameter:
0 No protection. All parameters can be accessed;
1 No access to Operating mode level.
2 No access to Operating mode level and Configuration level.
3 Full protection.
OFF
Figure 2 – Protection Disabled
Timer 1 SetPoint
0v1.t
Output 1 Time
OPERATION
Following power-on, the timer shows the main screen (Time) and will
remain in this screen in normal operation.
For configuring the timer, it is necessary to set proper values to the
various internal parameters.
The parameters are organized in three levels. To enter these levels,
one must press the P key for defined intervals of time, as shown
below.
Figure 3 – Protection Enabled
Temporization Setpoints Level
T1.sp
Figure 04 - Connection for pulse input.
ON
Timer Setpoint: It defines the total time to be
counted by the timer. In up counting, the timer
counts from zero to the value programmed in
t1.SP. In countdown, the timer counts from the
value programmed in t1.SP to zero.
Output temporization: Defines the interval of time
the output is to remain active after the time
programmed in t1.SP has elapsed (parameter
T1.S4 shall be set to 1 Ö output turns off after
output temporization).
During the output temporization the relays are
maintained active while the corresponding LEDs
blink to indicate the output temporization is taking
place.
2/5
Timer NT240
Configuration level
0PEr The NT240 has 11 pre-defined operating modes
plus the possibility for the user to create his own
Operation Mode
customized mode. The operation modes are
described with further details in the section "Timer
Operation Modes".
0 Delayed output following power on
1 Delayed pulse after power on
2 Pulse on power on
3 Cyclic after power on
4 Pulse after momentary input signal
5 Extended pulse after release of the input
signal
6 Delayed output after momentary signal in the
input
7 Delayed pulse after momentary signal in the
input
8 Pulse after continuous signal in the input
9 Delayed output following continuous input
signal
10 Delayed pulse after continuous input signal
11 Special mode defined by the user
1.rA
T1.uP
F Fu
PnP
Ov1.r
Temporization ranges: sets the interval range to
be used by the timer, as below:
0: 99.99 s
4: 9999 min
1: 999.9 s
5: 99 h 59 min
2: 9999 s
6: 9999 h
3: 99 min 59 s
t1.S1
Temporization Start. This parameter defines when
the temporization should be initiated:
0 : On timer power-up.
1 : Upon Start input activation (leading edge of
the Start input).
2 : Upon Start input being released (trailing edge
of the Start input)
3 : Start input leading edge only when the output
is off
4 : Start input trailing edge only when the output
is off
5 : Through the F key. The Function
programmed for the F key must be Reset
and Hold (FFv = 2).
t1.S2
Defines the timer action when the start input is
activated during the temporization:
0 : Restarts temporization
1 : Disregard the Start input when the
temporization is in progress
2 : Interrupts temporization.
t1.S3
This parameter defines the moment the output is
to be activated:
0: At the leading edge of the Start input signal.
1: At the trailing edge of the Start Input signal.
2: At the beginning of the temporization.
3: At the end of the temporization.
t1.S4
This parameter defines how the output is to be
turned off:
0: At the end of the programmed time interval;
1: After the output temporization, as defined in
ou1.t;
2: Only by the Reset command.
The Reset can be accomplished either by the
Reset input of by the F key programmed with
Reset function (FFv = 1).
T1.S5
Automatic temporization restart. Allows cyclical
temporization, according to the values below:
0: No automatic restart.
1: Restart at the end of the temporization (as
defined in t1.SP).
2: Restart after the end of the output
temporization (t1.SP + 0vt.1)
Defines the count mode presentation to the
display:
0: down counting
1: up counting
Function of the front panel F key:
0: The F key is not used;
1: Reset – Resets time counting;
2: Reset and Hold – Restarts or pauses time
counting. The key function depends on operation
mode chosen for the timer, as described in the
section "Timer Operation Modes".
Defines the type of the signal to be applied to the
timer input.
0: Sensor with open collector NPN output or dry
contact;
Sensor with open collector PNP output or logical
DC pulse
Output temporization range, to be used by the
0u1.t parameter.
0: 99.99 s
4: 9999 min
1: 999.9 s
5: 99 h 59 min
2: 9999 s
6: 9999 h
3: 99 min 59 s
PARAMETER CHANGE WHILE TEMPORIZATION IS
IN PROGRESS
When a parameter in the programming cycles of the timer is modified
by the user, the temporization in progress is interrupted and the timer
reset.
Do not change timer configuration while the temporization
is performing critical functions, as the outputs may be
turned on and off at improper moments.
Custom Operating Mode Level
NOTE: The parameters in the Custom Operating Mode level are
automatically set by the timer when a predefined operating mode is
selected (0PEr = 0 to 10). The parameters below are used when
the user needs to customized the timer to a particular mode of
operation (0PEr = 11).
3/5
Timer NT240
Mode 4 – Pulse after momentary Start signal
TIMER OPERATING MODES
The timer offers 11 predefined operating modes plus the possibility
for the user to customize his own mode of operation, by configuring
parameters t1.S1 to t1.S5. Modes 0 to 10 are the predefined ones,
whereas mode 11 left to the user control. They are described below:
Start
t1.SP
t1.SP
t1.SP
t1.SP
Out 1
Reset
Mode 0 – Delayed activation after power-up
T1.S1 to T1.S5 are automatically set to:
Power
t1.SP
t1.SP
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
1
1
2
0
0
Out 1
•
The F key can be programmed as Reset/Hold.
Reset
Mode 5 – Extended pulse after output is turned off
T1.S1 to T1.S5 are automatically set to:
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
0
0
3
2
0
Start
t1.SP
t1.SP
•
The F key can be programmed either as Reset or Reset/Hold.
t1.SP
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
2
1
0
0
1
t1.SP
Out 1
T1.S1 to T1.S5 are automatically set to:
Power
ou1.t
Reset
Mode 1 – Delayed pulse after power-up
t1.SP
t1.SP
Out 1
•
The F key can be programmed as Reset/Hold.
Reset
Mode 6 – Delayed output after momentary START signal
T1.S1 to T1.S5 are automatically set to:
Start
T1.S1
T1.S2
0
•
T1.S3
0
T1.S4
3
T1.S5
1
t1.SP
t1.SP
Out 1
0
The F key can be programmed either as Reset or Reset/Hold.
Reset
T1.S1 to T1.S5 are automatically set to:
Mode 2 – Pulse at power-up
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
1
1
3
2
0
Power
t1.SP
t1.SP
•
Out 1
The F key can be programmed as Reset/Hold.
Mode 7 – Delayed pulse after momentary START signal
Reset
T1.S1 to T1.S5 are automatically set to:
Start
t1.SP
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
0
0
2
0
0
ou1.t
t1.SP
ou1.t
t1.SP
Out 1
Reset
•
The F key can be programmed either as Reset or Reset/Hold.
T1.S1 to T1.S5 are automatically set to:
Mode 3 – Cyclic after power-up
Power
t1.SP
ou1.t
t1.SP
ou1.t
t1.SP
•
Out 1
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
3
1
3
1
0
The F key can be programmed as Reset/Hold.
Reset
T1.S1 to T1.S5 are automatically set to:
•
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
0
0
3
1
2
The F key can be programmed either as Reset or Hold.
4/5
Timer NT240
Mode 8 – Pulse after a continuous START signal
Start
t1.SP
t1.SP
t1.SP
Out 1
Reset
T1.S1 to T1.S5 are automatically set to:
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
1
2
2
0
0
• The F key can only be used for holding the temporization in
progress.
Mode 9 – Delayed output after a continuous START signal
Start
t1.SP
t1.SP
t1.SP
Out 1
Reset
T1.S1 to T1.S5 are automatically set to:
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
1
2
3
2
0
• The F key can only be used for holding the temporization in
progress.
Mode 10 – Delayed pulse after continuous START signal
Start
t1.SP
ou1.t
t1.SP
t1.SP
Out 1
Reset
T1.S1 to T1.S5 are automatically set to:
T1.S1
T1.S2
T1.S3
T1.S4
T1.S5
1
2
3
1
0
• The F key can only be used for holding the temporization in
progress.
Mode 11 – Customized Mode of Operation
In this mode, the operator is allowed to create his own mode of
operation if the predefined ones don’t meet the process needs. This
can be accomplished through parameters t1.S1 to t1.S5 in the
Custom Operating Mode level of parameters. The user must analyze
each one of the 5 parameters and understand the effect that each
one has on the timer. The user must consider that not all the
combinations of the parameters t1.S1 to t1.S5 are valid, and that
some combinations may lead to unexpected behaviors.
When programming a customized operation mode, the user must test
it to verify that it suits the application before incorporating it to the
system.
8. WARRANTY
Warranty conditions are available on our web site.
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