7 • Terminals Review
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Thermal Inputs
The TPR-6 can accept inputs from the following types of thermal sensors:
RTD - Platinum 100 Ohm (Pt100) - Three-wire measurement system to be used to compensate for
cable resistance.
Thermistors - field Programmable as PTC or NTC (Two wire)
Notes:
1. Shielded cables must be used. Connect shield to external ground.
2. For RTD maximum cable resistance allowed is 25 Ohm.
3. LCD display in Celsius degrees for RTD and in kOHMS for Thermistors
4. If a sensor is not used, leave relevant terminals open, and set in TEMPERATURE SETTING, Tx
SENSPR TYPE – NOT USED. This will prevent the display of the non-used sensors and to disable the
relevant Trip and Alarms.
For 6 thermal inputs
Thermistor 1 ……… 51+52 RTD 1 ............ 51+52, 53
Thermistor 2 ……… 54+55 RTD 2 ............ 54+55, 56
Thermistor 5 ……… 57+58 RTD 3 ............ 57+58, 59
Thermistor 4 ……… 60+61 RTD 4 ............ 60+61, 62
Thermistor 5 ……… 63+64 RTD 5 …........ 63+64, 65
Thermistor 6 ……… 66+67 RTD 6 ............ 66+67, 68
For a 14 thermal inputs
Thermistor 7 ……… 21+22 RTD 7 ............ 21+22, 23
Thermistor 8 ……… 24+25 RTD 8 ............ 24+25, 26
Thermistor 9 ……… 27+28 RTD 9 ........... 27+28, 29
Thermistor 10 …..… 30+31 RTD 10 ........... 30+31, 32
Thermistor 11 …….. 33+34 RTD 11 …....... 33+34, 35
Thermistor 12 …….. 36+37 RTD 12 ........... 36+37, 38
Thermistor 13 …….. 39+40 RTD 13 …....... 39+40, 41
Thermistor 14 …….. 42+43 RTD 14 ........... 42+43, 44
Note
: Disconnected sensors do not trip the unit!
Serial Link
Standard RS485 Half Duplex, with MODBUS protocol.
Twisted & shielded pair should be used for wiring.
Acceptable baud rates: 1200, 2400, 4800, 9600 and 19200 BPS.
Serial Port (+) ......................................................... 46
Serial Port (-) .......................................................... 47
Notes:
1. Auxiliary Power Supply must be turned Off after changing baud rate value.
2. In order to match the line, connect 120 Ohm resistors b and - at the end and the beginning of
the line.
Analogue Output
See isolation Warning (this page) . The output is programmable to 0-20mA, 4-20mA, Normal or Inverted
designated to any single sensor, minimum, average or maximum of a group of sensors.
Serial Port (+) ......................................................... 48
Serial Port (-) .......................................................... 49
Warning
The analogue output circuit is isolated as a
group together with the RS485
communication. When using both
connections, verify that analogue out user
(or RS-485 user) is using isolated circuitry.
