GHM Martens TB225, Руководство по эксплуатации

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2 Product description
The present processor-controlled, independently installed electronic regulating
and control device for control panel assembly is designed for the monitoring of
thermal processes and the safe control thereof in the event of an error. The de-
vice has universal inputs to which double thermocouples, PT100 sensors and
unit signals (0/4 … 20mA and/or 0/2 … 10V) can be connected. The safety func-
tion is provided by means of the main relay with configurable threshold. An addi-
tional relay with an independently adjustable threshold is provided for additional
signaling. In addition, it offers an analogue output which can be freely defined
within the measuring range of the temperature input. The resetting of the device
in the operating mode as a temperature limiter (TB) can take place via the but-
tons on the front, the integrated graphic display, or using an external switch or
external voltage.
2.1 Scope of delivery

TB225

this operating manual

further documents, if applicable
2.2 Functional principle
The connected temperature signal is evaluated and monitored. If the permissible
threshold is reached or an error occurs within the permissible temperature range
(sensor break, sensor short-circuit,, failure of a component in the device, error in
the software, failure of auxiliary voltage), the TB225 switches off immediately.
The additional relay output of the TB225 enables the function of a preliminary
alarm with an independent threshold.
The following operating modes are possible through configuration:
Temperature limiter (TB):
Maximum or minimum monitoring with catch
Manual resetting after fault elimination via the front keys or an external
switch / voltage signal
Operating methods in accordance with EN14597: 09/2012: Type 2B, 2H, 2V
Temperature monitor (TW):
Maximum or minimum monitoring without catch
Automatic resetting on return to the permissible range
Operating methods in accordance with EN14597: 09/2012: Type 2B