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Group A trip indicator -
Group A trip temperature set switches
Group B trip indicator
I
Group B trip temperature set switches--
Group C trip indicator
Group C trip temperature set switches-
I
Temperature set point mode
selection switches
The Model RTM20 temperature control relay has eight
different channels, each of which is devoted to a
separate RTD. There are two ways, or modes, of using
the eight channels . In mode 1, six channels (RTD's)
can be set at one trip temperature and the other two
Table 1 Trip Temperature Channels
-Temperature indicator
Power ON and OFF indicator
Sensor disconnection
or burnout indicator
Temperature indicator set switch
Manual reset switch
RTD selection switches
Reset mode selection switch
(manual or automatic)
can be set at another trip temperature . In mode 2,
three channels can be set at one trip temperature,
two at a second trip temperature and three at a third
trip temperature . In each mode, eight different places
can be monitored .
Channel
Mode
1
2
T
3T4
5
6
7
8
1
Trip temperature A
Trip temp .
B
2
Trip temp .
Trip temp.
Trip temp .
A
B
C
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