4 | nVent.com
COM 1 Out
COM 1 Out
22
66 10
10
++
––
RESET
NGC-40 BRIDGE MODULE
COM 2 Out
COM 2 Out
44
88 12
12
++
––
120 ohm
termination
resistor
120 ohm
termination
resistor
Field
terminal
block
Field
terminal
block
120 ohm
termination
resistor
120 ohm
termination
resistor
COM 1 In
COM 1 In
11
55
99
++
––
RESET
NGC-40 BRIDGE MODULE
To upstream
device
To upstream
device
Field
terminal
block
Field
terminal
block
COM 2 In
COM 2 In
33
77 11
11
++
––
++
––
++
––
To upstream
device
To upstream
device
Wiring for Com 1 & Com 2 must be terminated on a panel
mounted terminal block. No ground wires should be
terminated on terminals 9 & 11. Terminate Com shields at
the panel mounted field terminal block chassis ground.
Wiring for Com 1 & Com 2 must be terminated on a panel
mounted terminal block. No ground wires should be
terminated on terminals 10 & 12. Terminate Com shields and
120 Ω termination resistors (included) at the panel mounted
field terminal block as shown.
1
2
1
2
Each NGC-40-BRIDGE mounts on a DIN 35 rail.
MOUNTING: Insert the rear bottom of the module into the DIN rail, then push up
and inwards to engage the clip.
REMOVAL: Push the module upwards to
disengage the clip, then rotate the module
toward you.
Mounting the NGC-40-BRIDGE
RS-485 Connection Diagrams – North American Installation Technique
COM 1&2 Connections (In)
COM 1&2 Connections (Out) and
RS-485 Termination Resistor
