TECSYSTEM T154 Instruction Manual

INSTRUCTION MANUAL

TECSYSTEMS S r. I.

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T154

P4 V3 1. 2C

1

R3 T154 Table of contents

Introduction...........................................................................................3

Mounting...............................................................................................3

Dimensions ...........................................................................................3

Controls.................................................................................................4

Screen Displays ...................................................................................4

Screen Messages...................................................................................5

Light Test..............................................................................................5

Control Power.......................................................................................5

Wiring...................................................................................................6

Inputs ....................................................................................................7

Outputs..................................................................................................7

Programming ........................................................................................8

Pictorial.................................................................................................10

Technical Specifications .......................................................................11

Testing ..................................................................................................12

Warranty...............................................................................................12

Troubleshooting....................................................................................13

Options..................................................................................................14

Approvals..............................................................................................14

T154 Instruction Manual P4 V3 1.2C
February 19, 2007

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Introduction The T154 Temperature Monitor will monitor and control up to four, three-

wire RTD inputs. All input channels may be user programmed for two
separate outputs with a range of 0 to 240°C (32 to 464°F). The set points are
common to all channels. The unit is microprocessor based which offers
application flexibility, and easy integration to a variety of applications
including electric motors; electric and diesel generators; all types of
transformers; electric cables; and industrial and chemical processes. ANSI 49
covers the thermal protection provided.
The unit is intended for semi-flush mounting with hardware provided.
Installation and set-up is simple using the universal power supply 24 to 240V
AC or DC and functional user controls and display.

Mounting T154 is designed for semi-flush panel mounting. Mounting hardware is

included with each unit. The panel cutout dimension is 92 x 92mm (3.62 in. x

3.62 in.).

Dimensions Ref Figure 1

96 x 96 x 127 mm (3.78 x 3.78 x 5.51 in.)

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Figure 1

3

Controls All functional controls and displays are located on the front of the unit. The

unit has six input keys, two having dual functions. These are PRG/SET and
ENT/RESET. Keys may be categorized as, programming, screen display, and
test.

Programming keys are located at the bottom of the unit and may be identified

by the blue type. These are PRG, ENT, UP (symbol) DOWN (symbol). The
screen display may be changed by the DISPLAY MODE key located to the
right side of the display, identified by the yellow type. The TEST key is
located beside the display mode key, identified by white type. When the test
provision is enabled the SET and RESET keys are activated, with the PRG
and ENT keys disabled.

Screen Displays EACH ACTIVE CHANNEL HAS FOUR ASSOCIATED LED’S,

INDICATING STATUS. TRIP, ALARM, FAN, OR FAULT, THE LED
COLOURS ARE INTERPRETED AS FOLLOWS
Green

Displays the active channel 1-2-3 or 4

Yellow

-The associated channel has exceeded the alarm trip set point, and the alarm
output relay has changed state

-The fan relay has been ener gized

Red

-The associated channel has exceeded the trip set point and the trip output
relay has changed state.

-Indication of a fault condition

All messages and operating parameters are displayed on the screen. The
DISPLAY MODE key controls the operating mode of the screen display
allowing any one of four modes to be selected: scan, auto , man, or Tmax.
An illuminated yellow LED at the top of the display indicates the active mode
and pressing the DISPLAY MODE key toggles the four different modes. The
different modes display the following information:

Scan

Each channel is scanned for approximately three seconds during which the
actual temperature of that channel is displayed

Auto

All active channels are scanned, but only the temperature of the hottest
channel is displayed on the screen. This mode does not affect protection.

Man

Each channel may be viewed manually by pressing the UP or DOWN key.
The information displayed on the screen will be that of the channel whose
green LED is lit. All active channels are still scanned but only the temperature
of the selected channel is displayed. This mode does not affect protection.

Tmax

This value is logged in memory and is the maximum temperature recorded on
any active input channel. The temperature value is shown and the channel is
identified.

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Screen Messages The main LED screen displays a variety of messages some of which only

appear during programming or as a result of component or unit failure. During
the course of normal operation the following screen display indi cates a fault
condition:

• FOC: Fault open circuit - RTD input to one or more channels has open

circuited. LED illumination is provided showing fault relay indication,
and the affected channel is identified

• FCD: Fault sensor reading - RTD signal is erroneous. This is a

programmable feature that is enabled by the user. Sensitivity is user
selectable from 1(low) to 30 (high) This determines response time
The controller decides if the signal input from the RTD is accurate. The
fault relay will trip if a signal input is determined to be wrong. The sensor
must be replaced. To reset the fault relay push RESET until RST appears
on the main display

• FCC: Fault short circuit - RTD is short -circuited. The RTD has failed or the

RTD selection and the unit are not compati ble. The cause is the result of
lower resistance across the input than the unit is calibrated for. Indication
of this problem is provided by fault relay LED indication. The main
display will show FCC and a channel is identified If all alarm and trip
LED’s illuminate with fault indication, the probability is, the RTD’s are

not compatible with the unit
All other messages pertain to program or test functions, which are described
under programming or test.

Light Test This test is conducted automatically after completion of programming or

viewing programmed information. It is intended to provide visual indication
of all illuminated LED’s and their operation.
It is advisable to carry out this test on a regular basis to ensure all lamps are
functioning normally. Pressing the TEST key at any time allows the user to
test all lamps.
If any lamp is not functioning the unit must be returned for repair.

Control Power The T154 has a universal power supply. It can be supplied with 24 to 240V

AC or DC without respect to polarities.
The ground cable must be fixed to terminal # 41

ATTENTION: The unit may be damaged by over voltage
when power is supplied directly from the secondary of the
transformer it is monitoring. This may occur when the 240V is
obtained directly from the secondary winding and there are
fixed capacitors online. Use a control circuit transformer, with
a secondary voltage of 24 to 120V AC or DC to avoid
damage.

ATTENTION: Disconnect the power supply to the T154
when conducting insulation testing with an AC or DC HiPot.

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Failure to do so may result in damage to the unit.

Wiring Terminal blocks are located at the rear of the unit for all input channels (4),

output relays (4) and control power.

The terminal blocks are removable for ease of wiring

Wiring connections are shown in Figure 2

Figure 2

Wiring (Cont.) Sensor wiring and routing

All sensor wiring must be:

• Separated from power wiring;

• Shielded cable with twisted conductors;

• Have a cross section of 0.5mm (22AWG);

• Be twisted conductor if no shield;

• Have tinned or silvered conductors;

• Be firmly fixed in the terminal board.

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Inputs The T154 will accept three or four, three-wire RTD inputs.

The standard unit is calibrated for 100 -ohm, platinum RTDs.
The T154 may also be ordered for use with 100 or120-ohm, nickel RTDs.
Channels 1-2-3 must have inputs connected or the unit will read an open
circuit with the FOC message displayed, and the fault relay tripped. In
applications with less than three channels connected, a resistor of 100 ohms or
more must be connected across the open channel. This will eliminate nuisance
tripping of the fault relay. The display will show a value for the unused
channel, which is based on resistance vs. temperature for 100 ohm platinum
RTD’s. To select a resistance value corresponding to a temperature value, a
100 ohm resistor is equivalent to 0°C. Each 3.89 ohms (minus .01 per
increment) is equivalent to 10°C. Ensure this does not interfere with the alarm
or trip set points. Always choose a fixed resistance to provide a value lower
than the set point values on the active channels.
Applications with transformers requires the RTD’s to be connected in
sequence for best performance, i.e. Winding 1-2-3 connected to channels 1-2­3
Channel 4 is a programmable option. This channel m ay be enabled/disabled in
the program mode.

Outputs The standard version of the T154 incorporates four output relays. These are:

Trip, Alarm, Fault and Fan.

• Alarm , Trip & Fault relays are single -pole, double throw, fan relays are

SPST.

• The Alarm, and Tri p relays may be programmed with individual

temperature set point values All channels will respond to the

programmed values.

• The Fan relay may be programmed with an ON and Off set point

temperature value. The operation is selected in program mode. Two

choices are offered; one based on RTD inputs connected to channels 1,2

or 3 or; controlled by an RTD connected to channel 4. The fan relay

incorporates a fan test procedure this is selected in program mode. This

feature allows automatic cycling of the fans five minutes of a selected

hourly interval from one to ninty nine hours. To disable this feature enter

ooo

• The alarm and trip relays will change contact state when the set- point

temperature value is reached. This value must be present for a minimum

of four seconds in excess of 1 degree C above the set-point threshold

• The Fault relay is activated when the unit senses a defective component or

failure of the relay. This relay changes contact state when the unit is

powered on line. Resetting this relay requires repair, replacement or

correction of components. Resetting the fault relay is affected by the FCD

program selection, refer to SCREEN MESSAGES for more detail..

• Output relays are controlled by set-point thresholds for alarm trip and fan

relays. Each channel surveys the temperature independently, and the

hottest channel will cause the relays to trip when the threshold is

exceeded. The reset function requires all channels to drop one degree C

below the trip thresholds and the relays reset automatically.

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Programming Getting started

Programming the T154 is simple and requires no special tools. The set point
values for alarm, trip and fan control should be at hand.
The unit will automatically step through each program sequence and upon
completion will repeat each step or may be returned to normal operation.
The program sequence is as follows;

1) Input alarm temperature value for all channels, range 0-240°C (32 -464°F)

2) Input trip temperature value for all channels, range. 0-240°C (32 -464°F)

3) Select channel four; yes or no. If YES set alarm & trip set points
Note: set point values for this channel are independent of channels 1-2 or 3
This channel would normally be used with fan operation.

4) Select fan operation; NO or (YES) select channels 1-2-3 or 4

5) Set the fan ON temperature. High temperature

6) Set the fan OFF temperature. Low temperature

7) Select fan test interval, 5 minutes of xxx (1 – 99 hrs) or disable by entering

000

8) Select FCD; NO. If YES, set sensitivity 1 to 30
Higher numerical values offer faster response time under fault conditions

Push ENT key to return to normal operation
Unit will perform light test and return to normal operation.

Programming Sequence

1) To begin programming, press the PRG key for approximately seven

seconds. After this inter val the main screen display will present the

message PRG. The unit will then advance to the first program selection,

and the yellow PROG light above the PRG key will illuminate. After each

selection press the PRG key to advance to the next selection. At any time

during the program sequence you may discontinue by pressing the ENT

key. To enter programming again you must repeat the sequence above.

2) To review the entered values, momentarily press the PRG key and continue

to do so advancing to each programmed value. If the yellow LED is not

on, no program changes are possible

3) After advancing to any program selection, use the up/down keys to enter

your selection, or set point value.
During the programming sequence a timer allows 60 seconds for any input. If
time elapses and no input is made the unit reverts to normal operation.
As the unit advances to each of the program selections the main LED screen
will display a message or set point value.
When entering set point values for all selections, green, yellow and red

LED’s will illuminate providing reference to the functions and channels.

End of program

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Programming (Cont.)

4) Select fan operation

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Enter Program Values

1) Input set point temperature value for alarm

Screen display: numerical value, yellow alarm LED flashing, green chn

indicators 1-2-3

Action: Scroll up/down, using up down keys

Options: 0-240°C (32-464°F)

Complete: Press PRG —Advance

Discontinue: Press ENT

2) Input set point temperature value for trip

Screen display: numerical value, red trip LED flashing green chn

indicators 1-2-3

Action: Scroll up/down using up-down keys

Options: 0-240°C (32-464°F)

Complete: press PRG -Advance

Discontinue: Depress ENT

3) Select channel 4

Screen display: YES

Action: Scroll up/down using up-down keys

Options: Yes / No

IF YES: Set alarm & trip temperatures specific to chn 4 repeat steps 1& 2

Complete: press PRG -Advance

Discontinue: press ENT

Screen display: NO Yellow fan LED flashing

Action: Scroll up/down using up-down keys

Options: NO , or choice of channel 1-2-3 or 4

Select channels 1-2-3 or 4 using up down keys. Green channel indicators

will change. Press PRG to select.

Enter fan ON temperature (high) press PRG set value. Press PRG

Enter fan OFF temperature (low) press PRG set value. Press PRG

Set fan test interval Hfn (1hr to 99 hrs) Press PRG set value, or ooo to

disable

Complete: Press PRG - Advance

Discontinue: Press ENT

5) Select FCD operation
Screen Display: FCD flashing, NO , or numeric value ( NO, is factory

default)

Action: Scrol l up/down using up-down keys

Options: NO (disable feature) or 1 to 30 to enable feature

Numeric value represents response time 1=slow 30=fast

Complete: Press PRG -Advance

Discontinue: Press ENT

END OF PROGRAM

PRESS PRG to return to step #1
Or ENT to return to normal operation

9

Pictorial

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TECSYSTEM S.r.i 

TECHNICAL SPECIFICATIONS

Auxiliary Power Supply

• Rated voltage 24-240 Vac-dc

• Maximum ratings 20.270 Vac-dc

• Vdc with reversible polarities

Inputs

• Four inputs RTD PT 100 sensors – 3

wires

• Removable rear terminals

• Input channels protected against

electromagnetic noises and spikes

• Sensors length cables compensation up

to 500 m (1 mm²)

Tests and Performances

• Assembling in accordance with CE rules

• Protection against electrical and

magnetic noises: CEI-EN50081­2/50082-2

• Dielectric strength 2500 Vac for 1 min.

from relays to sensors, relays to power
supply, power supply to sensors

• Accuracy: ± 1% full scale, ± 1 digit

• Ambient operating temperature -20ºC to

60ºC (-4ºF to 140ºF)

• Humidity 90% non-condensing

• ABS self -extinguishing housing

NORYL 94VO

• Frontal in polycarbonate IP54

• Burden 3Va

• Data storage 10 years minimum

• Digital linearity of sensors signal

• Self-diagnostic circuit

• Opt. Protection treatment of electronic

part

• Opt. frontal plastic protection

Dimensions

• 96 x 96mm (3.78 x 3.78 in.) – DIN

N43700-Prof. 127 mm deep 5.51” (with
rear terminals)

• panel cutout 92 x 92mm (3.62 x 3.62)

Communication

• Not available

Outputs

• Three alarm relays (Alarm -Trip-Fan)

• One-alarm relay for sensor fault or wo rking

anomaly (FAULT)

• Output contacts capacity: 5A-250Vac res.

• Arranged for output relays test

Display and Data Management

• One display, 13mm (0.5 in.) high 3 digit with 3

digit for displaying temperatures

• LED for displaying reference channel

• Eight LEDs indicating alarm or trip

• LED indicating fault, LED indicating fan

• Temperature monitoring from 0-240°C (32 -

464°F)

• Separate alarm and trip values

• Sensors diagnostic (Fcc-Foc-Fcd)

• Program entry by frontal push button

• Automatic output from programming cycle after

1 min. of no operation

• Wrong programming automatic display

• Programmed data call out

• Possibility of setting manual channel scanning

or hottest channel

• Maximum temperatures storage

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Testing All relays may be tested using the following procedure:

1) Press and hold the TEST key for 7 seconds. The main screen display will

flash TST and then default to an active test of the fault relay

2) Release the test key when the yellow test on LED illuminates. The screen

display will show OF F and the red LED indicating fault relay is

illuminated.

3) Test the fan, fault, alarm or trip relay. Use the Scroll up/down keys to make

the selection. The screen display will show the relay selected for testing.

LED’s illuminate identifying the relay being tested. Press the SET (white

print) key and check for contact operation. To reset press the RESET

(white print) key.

4) To discontinue operation and revert to normal operation, press the TEST

key.
At the start of the test, a timer is automatically initiated which reverts the unit
to normal operation if no inputs are detected for a period of five minutes
Temperature Simulation
Connect fixed or variable resistors across all channels to simulate RTD inputs.
All resistors must be connected to the input channel using the three
terminations provided. This is achieved by terminating the resistor to the two
lowest termination numbers of each channel with a jumper from the middle to
highest number
Example Channel #1
Termination #’s 13-14-15
Connect the resistor across 13-14
Connect the jumper from 14-15
Repeat for channels two, three. and four
The resistance values for all inputs must be variable between 100 and 200
ohms.
Connect the T154 to a suitable power supply.
Set the resistance value to a corresponding temperature value for the RTD
type being used. All RTD’s have published resistance vs temperature values
For 100 ohm platinum a resistance value of 175.84 ohms will yield 200ºC A
resistance of 138.50 ohms yields a temperature of 100ºC Check to verify the
readings on the main display.
The unit is completely functional with the resistors connected, and complete
evaluation is possible by following the instruction manual.

Warranty The T154 is warranted for a period of 12 months from date of shipment.

Warranty is lim ited to repair or replacement of the defective product and no
contingent liabilities will be accepted.
Warranty will be voided if the unit is found to be tampered with or it has been
damaged as a result of incorrect input or power supply connections, or is
damaged as a result of transitory over voltages.
Freight expense is not covered under warranty.

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Troubleshooting

Problem Causes / Solution

The unit will not switch on, with control power
energized

The sensor is damaged The fault relay closes and the fault LED

The fault relay has tripped , and the main screen
is displaying FOC/FCC

Check the terminal block for correct installation
Check for voltage at terminal block

switches on. The red LED of the respective
channel is illuminated. A message is displayed.
FOC- sensor open
FCC- sensor is short circuited

Check the sensor connections.
Look for damaged sensors.
Replace damaged sensor

When switching the unit on-off, alarm and trip
relays energize

All the sensors are displaying FCC Wrong wiring connections

The temperature indicated by one, or more
channels is wrong

Sudden operation of trip relay, with normal
operating temperature,
One channel caused the occurance

With a power supply of 24VDC the unit,
switches off and will not switch back on

Strong electrical noise is being picked up on the
power line.
Install a transient suppressor (PT73)
Check to ensure the shield of the sensor cable is
connected to the panel ground
Install shielded cable, or twist the sensor
conductors

The terminal block is upside down
RTD’s are not compatible

The sensors are defective.
Check the sensor resistance for compatability,
with your unit.
The unit is calibrated incorrectly
Return for repair
Sensor defective FCD
Replace the sensor

Check the input voltage is between
20-24VDC
Reconnect to a stable source of power Return if
unit does not respond

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Options • Protective display cover

• 120 or 100 ohm nickel RTD input

Approvals • Assembled in accordance with CE rules.

• Protection against electrical and magnetic noises CEI-EN50081-2/50082-2

• C-UL approval, File No, 190427

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14