Eaton Electrical D77A user manual AC Inputs, AC Input Wiring

Intelligent Technologies (IT.) D77A I/O Module Products

AC Inputs

AC power is typically used to energize loads related to machinery function such as solenoid valves and motor starters. The same AC power source is often used as signal power for inputs as illustrated in Figure 35. The input devices to which AC inputs are wired are typically two-lead devices like push buttons, limit switches and selector switches. One side of the input device is wired to an AC power source while the other is wired to the input terminal. Another input terminal is wired to a grounded neutral wire. Refer to AC Output Module Specifications on page 13 for module details.

L1	1FU
L2	2FU

a

L3	3FU
	g	H1	H3	H2	H4
	L1				L2

10FU

f

e

d

X1

N/C

X2

b

0

C0

1

c

2

C1

3

JIC-0002

Figure 35: AC Input Wiring

a)Three-phase Motor Circuits

b)First Point of Input Module

c)Second Point of Module

d)Selector Switch

e)Push Button

f)Limit Switch

g)Control Transformer

MN05002001E For more information visit: www.EatonElectrical.com 37