• When connecting System 450 compatible sensors
with shielded cable to a System 450 control
module, connect the cable shield drain lead to one
of the C (common) terminals on the input sensor
terminal block. Do not connect the shield at any
other point along the cable. Isolate and insulate
the shield drain at the sensor end of the cable.
Connecting a cable shield at more than one point
can enable transient currents to flow through
the sensor cable shield, which can cause erratic
control operation.
See Figure 5 for the active/passive sensor jumper settings.
See
Figure 2: C450RxN-1 and C450RxN-3 wiring terminals
Callout
Description
1
Supply power and input sensor terminals: low voltage (less than 30V)
Labels:
5V, 24V, Sn-1, Sn-2, Sn-3
Note:
Common terminals (C) are internally connected.
2
6-pin module connector
3
Second output relay and terminal block. Labels: LNC2, LN02 and LC2
Note:
Not available in all models.
4
Internal SPDT relay. This is normally in the closed or off position and dry-contact, line-voltage relay output terminals. For more information on
electrical ratings, see
Labels:
LNC1,
LN01, LC1
Note:
The relay output terminals connect to an internal SPDT relay and do not supply any power to the application.
5
Active or passive sensor jumper positions Labels: Sn-1, Sn-2, Sn-3
Note:
Jumpers are present only in Version 1.
System 450 Series Reset Control Modules with Real-Time Clock and Relay Output Installation Guide
3
