DigiTrace MoniTrace RMM2 Installationsanleitung Seite 6

C. Connect RTD Cables to the RMM2
The RMM2 has terminals for 8 three-wire, RTDs
(Pt 100 temperature sensors, to IEC 751-1983);
do not use other types of RTDs. Select RTDs
appropriate for the usage:
MONI-PT100-NH
MONI-PT100-EXE Temperature sensor for
Install each RTD in accordance with the instal-
lation instructions shipped with it, and run the
RTD lead wires to the RMM2.
Note: Resistance of lead wires from each RTD
must not exceed 20 Ω (e.g. 150 m with
3 x 1,5 mm cable).
2
0
6. Connect lead wires from each RTD to the
selected RMM2 terminal block
The RMM2 has 8 terminal blocks to connect
lead wires from 8 RTDs. Each RTD connection
RMM2
terminal no.
1
2
3
4
5
6
7
8
Temperature sensor for
non-hazardous areas
hazardous areas
(EEx e II T6, zone1)
8
Piping drawing
identification
is numbered; the number identifies the RTD,
and determines the order in which the Moni-
Trace 200N displays the RTD measurement.
Therefore, order the RTD connections in a
manner that makes the MoniTrace 200N display
most meaningful.
The RMM2 cover shows the correct wiring
arrangement for the RTD wires. With Raychem
RTDs, connect the two RTD lead wires of the
same colour to the terminals marked "-" and
connect the RTD lead wire that is a different
colour to the + terminal.
Note: If the RTD lead wires are reversed, the
MoniTrace 200N will give an obviously wrong
temperature measurement.
7. If RTD-shield is not earthed elsewhere,
connect shield to earth terminal.
8. Record the location/identification for each
RTD.
Because the RMM2 terminal connection
number identifies the RTD in the MoniTrace
200N system, it is important to record the
location of each RTD. Use the space below to
record the connections, and label the RMM2
or its enclosure with this RTD identification
information.
Description or location
5