System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin40
Wiring System 450 Sensors and Transducers
Refer to the sensor installation instructions referenced in Related Documentation
on page 5 for information on wiring System 450 compatible sensors.
Line-Voltage
Output Relay
Terminal Blocks
(on Control and
Expansion Modules
with Relay Output)
LNC1,
LNC2
Connects equipment control circuit to the line-
voltage Normally Closed (LNC) contact on the SPDT
relay.
LNC2 terminals are only on control and expansion
modules with two output relays.
28 AWG to 14 AWG
0.08 mm
2
to 2.5 mm
2
LNO1,
LNO2
Connects equipment control circuit to the line-
voltage Normally Open (LNO) contact on the SPDT
relay.
LNO2 terminals are only on control and expansion
modules with two output relays.
LC1
LC2
Connects line power to the line-voltage Common
(LC) on the SPDT relay.
LC2 terminals are only on control and expansion
modules with two output relays.
Low-Voltage
Analog Output
Terminal Block
(on Control and
Expansion Modules
with Analog
Outputs)
AO1
AO2
In conjunction with the COM terminal, provides a
self-detecting analog output signal; either
0 to 10 VDC or 4 to 20 mA.
28 AWG to 16 AWG
0.08 mm
2
to 1.5 mm
2
COM In conjunction with the AO1 or AO2 terminal,
provides a self-detecting analog output signal; either
0 to 10 VDC or 4 to 20 mA.
Line-Voltage
Supply Power
Terminal Block (on
Power Modules
only)
240 VAC Left terminal is for one 240 VAC supply power lead. 22 AWG to 14 AWG
0.34 mm
2
to 2.5 mm
2
No Label
on the
Middle
Terminal
Middle terminal is the Common connection for either
the 120 VAC or 240 VAC supply power lead.
120 VAC Right terminal is for one 120 VAC supply power lead.
Table 6: System 450 Wiring Terminal and Wire Size Information (Part 2 of 2)
Terminal Block
Type
(on Module Type)
Terminal
Label
Terminal Function Required Wire
Sizes
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