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Power Supply
The power supply connector (TB19) is a
dual two pin connector. Either connector
allows for power in (pin #1 (+), pin #2 (–)
and bussing of power to other NGC-30-
CRM modules).
Note: Power supply must be sized correctly
based on the number of NGC-30-CRM/-
CRMS modules.
RS-485 Communications
The RS-485 connector (TB6) is a dual three
pin connector. Either connector allows for
RS-485 input signals (pin #1 (shield), pin
#2 (+), pin #3 (–)) and bussing of RS485
signal to other NGC-30-CRM modules.
End of Line (EOL) Jumper
If this device (NGC-30-CRM/-CRMS) is the
last device in the RS-485 network, the J1
jumper needs to be moved from terminals 2
& 3 to terminals 1 & 2.
RTD Inputs – Ordinary Area
3 wire RTDs with shield may be connected
to RTD Ch1 thru Ch 5 (TB1 - TB5). The two
common wires (usually red, red) are
connected to terminals 2 & 3, the source
(usually white) to terminal 1 and the braid
to terminal 4 (earth ground).
Note: RTD's are not required if monitoring
1 2 3 4
current/ground-faults only or if RTD's are
connected via MONI-RMM2s.
RTD connected directly to CRM board
RTD
R D
R
T
T
D
R D
R
T
T
D
R
R D
T
T
D
R D
R
T
T
D
Chassis Ground
1
2 1
2
1 2 3
1 2 3
Normal
End of Line
position
position
1
2
1
2
3
3
1
R
R
T
T
D
D
1
1
2
3
S
S
h
h
e i
e i
d l
d l
4
1
R
R
T
T
D
D
2
2
2
3
S
S
h
h
e i
e i
d l
d l
4
1
R
R
T
T
D
D
3
3
2
CRM
3
PCB
S
S
h
h
e i
e i
d l
d l
4
1
R
R
T
T
D
D
4
4
2
3
S
S
h
h
e i
e i
d l
d l
4
1
R
R
T
T
D
D
5
5
2
3
S
S
h
h
e i
e i
d l
d l
4
Relay Output Connections to
Contactors or Solid State Devices
(TB7)
This connector switches voltage to the
contactor coils or solid state relays. The
pilot relay will switch the supply voltage (up
to 277 Vac) to the contactor coil (using an
NGC-30-CRM) or 12 Vdc to the solid state
device (using an NGC-30-CRMS).
Refer to system layout diagram for detail wiring.
Common Alarm
The common alarm terminal block (TB12)
provides a form C dry contact, rated at
277 Vac max (3A).
When the nVent RAYCHEM NGC-30 system
is powered on, the common alarm relay
coil is energized and pin 2 is connected
to pin 1 (common). This is the "No Alarm"
condition for the CRM/CRMS board.
If the alarm occurs, or the CRM/CRMS
board loses power, the relay coil is
de-energized and pin 1 (common) is
disconnected from pin 2 and connected to
pin 3 to indicate an alarm condition exits.
Address Switches (SW1 & SW2)
Each NGC-30-CRM/-CRMS must have a
unique communication address selected.
The valid address switch range when using
the NGC-UIT is 1-99. SW1 is the ones digit
(0–9) and SW2 is the tens digit (0 or 9).
Note: When adding an NGC-30-CRM/-
CRMS to the system, you must perform a
network update at the NGC-UIT.
Ground-Fault/Line Current Sensors
Connections from NGC-30-CRM/-CRMS to NGC-30-CTM.
Using an RJ11 connector/cable assembly, connect one end to
an RJ11 input (TB13-TB17) and the other end to the appropriate
NGC-30-CTM RJ11 connector.
Ground-Fault/Line Current Cable Assembly
Cables are not available as loose item. They need to be created by
the project team while assembling the panel.
10-RLY3
8-RLY2
12-RLY4
7
8
9 10 11 12
1
2
3
4
5
6
1-COM
6-RLY5
3-RLY1
1
2
3
Relay "No Alarm"
Condition
MSB
LSB
SW2
SW1
Typical connection
(1 of 5)
8
(L)
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