RM340 pages

C-mac

®

Temperature relay RM34

Temperature monitoring relay for Pt100 sensor
4 metering ranges in one module
Adjustments for setpoint and time delay
Selectable range, relay inversion and time delay
Cable resistance compensation
1- or 2-pole relay output
DC supply or AC supplies up to 230 VAC
Made in accordance with the
and EMC regulations
C-mac® monitoring relay, type RM34, is used for temperature metering in conjunction with Pt100 temperature sensors according to DIN 43760. A 3-wire
metering principle is used, which means that the module compensates for the external cable resistance.
The cable monitoring circuit also ensures that the relay will release in case of short-circuit or cable breakage.
By means of a DIP-switch in the bottom of the unit
you can select between 4 metering ranges and 4 different combinations of relay inversion and reactiondelay.
The 4 metering ranges are:
-50 - 50 °C
0 - 100 °C
50 - 150 °C
100 - 200 °C
With the relay inversion you can select, if the unit is
used for heating or cooling.
The time-delay is adjustable between 0 and 10 sec.
The module is available with either 1- or 2-pole relay
output.
On the front of the unit you can adjust the setpoint and
reaction-delay between 0 and 10 seconds.
The unit is supplied for 24, 115 or 230 VAC supply or
10-50 VDC sypply.

Functional diagram:
setpoint
hysteresis
inp. signal
output, ex.1
output, ex.2
output, ex.3
output, ex.4
t

t

t

t

t

Function and range selection:
SW 1

SW 2

ex. no.

OFF

OFF

1

Relay activates, when setpoint is
exceeded, delay on release

ON

OFF

2

Relay releases, when setpoint is
exceeded, delay on activate

OFF

ON

3

Delay on activate, when setpoint
is exceeded

ON

ON

4

Delay on release, when setpoint
is exceeded

SW 3

SW 4

Metering range

OFF

OFF

-50 - +50 °C

ON

OFF

0 - 100 °C

OFF

ON

50 - 150 °C

ON

ON

100 - 200 °C

Comadan
Produktion a/s

function

8-1