5
Explanatory Notes
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Description
The control unit TRS 5-40 together with the temperature sensors TRS 5-6x and the temperature trans-
mitter TRV 5-40 constitutes a temperature monitoring system.
Two temperature sensors TRG 5-6x detect the temperature values which are then converted by the
temperature transmitter TRV 5-40 and made available for the CAN bus in the form of a data telegram.
The CANopen protocol is used for the data transfer via CAN bus.
The control unit TRS 5-40 can be used
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as MIN and MAX temperature monitor in combination with the temperature transmitter TRV 5-40
and with one temperature sensor TRG 5-6x each and
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as temperature controller in combination with the temperature transmitter TRV 5-40 and with one
temperature sensor TRG 5-6x (MIN or MAX)
The control unit TRS 5-40 is also available with two actual value outputs 4 - 20 mA.
The equipment combinations can be used for controlling or monitoring temperatures in steam boilers
and (pressurised) hot water installations to TRD and EN 12952 and EN 12953.
Function
The control unit TRS 5-40 evaluates the data telegram coming from the temperature transmitter
TRV 5-40 at regular intervals. This data telegram contains:
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Actual value and ajdusted switchpoint for measuring channel 1,
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Actual value and ajdusted switchpoint for measuring channel 2,
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Temperature in the housing of the temperature transmitter.
In addition, the following error messages are also included in the data telegram:
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Malfunction in the temperature sensor (sensor damaged, short circuit),
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Temperature in the housing of the temperature transmitter too high,
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Communication error.
The output relays 1 – 4 are assigned to the measuring channels 1 and 2 as follows:
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Measuring channel 1: Output relay 1
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Measuring channel 2: Output relays 2, 3 and 4.
To activate or de-activate the measuring channels and to set the functions use the code switch or the
operating & display unit URB 2.
Use the operating & display unit URB 2 to set the MIN / MAX temperature switchpoints for the tempera-
ture control as well as to establish the actual value outputs.
If there is an error message relay(s) 1 and/or 4 will be de-energized.
System components
TRG 5-6x
Temperature sensor Pt 100.
TRV 5-40
Temperature transmitter for temperature sensor Pt 100
Data exchange: CAN bus to ISO 11898 via CANopen protocol.
