Remote Temperatures Via Nvent Raychem Rmm; Electrical Installation - nVent Raychem NGC-20-C-E Installations-, Betriebs- Und Wartungsanleitung

2.4 Electrical installation

Figure 9 shows the electrical connection diagram of the NGC-20 controller. The limiter temperature sensor connection is only applicable
with the NGC-20-CL-E. The optional second Pt100 temperature sensor for the control unit is omitted for clarity.
L1
N
PE
RS485 cable from
previous device
When the device is the last on the communication
line install a wire bridge between the - and
T terminal as shown by the dotted line
W/B R R PE RTD 2
W/B R R PE RTD 1
W/B R R PE RTD LIMITER
PT100
temperature
sensor(s)
temperature sensor
Only to be used for the LIMITER
Figure 9: electrical connection diagram NGC-20
14 | nVent.com
RS485 S
+ –
RS485
S + –
Internal RS485
PE
end of line
termination
resistor
PT100
Li Lo Ni No PE PE PE
Alarm
T
3A Max
Heating cable
To next NGC-20
RS485 cable to
next device
Lo No
Heater