Publication 1747-UM011G-EN-P - June 2008
Grounded ac Power-Distribution System with Master-Control
Relay
Power Supply Required InputVoltage Characteristics
•The applied input voltage must be at or below 132V ac RMS (265V ac
RMS in 240 Volt mode).
•Minimum acceptable value of the applied input voltage must be above
85V ac RMS (170V ac RMS in 240 Volt mode).
•The frequency of the applied voltage must be within 47...63 Hz.
•Both the positive and negative halfcycles must be symmetrical and
conform to these requirements.
1
+–
Enclosure
Wall
Connect when
applicable
Suppressor
To Motor
Starters
Back-panel
Ground Bus
Step-down
Transformer
Grounded Conductor
Equipment
Grounding
Conductors
Start
Suppressor
MCR
MCR
FUSE
Multiple E-stop
Switches
Controller
Power Supply
Incoming
ac
1FU
Grounding-electrode
Conductor to
Grounding-electrode
System
L1
GND
N or L2
Suppressor
Input Module
Wiring Arm
Output Module
Wiring Arm
Output
Actuator
Input
Sensor
MCR
MCR
User dc
Supply
The I/O circuits form a net
inductive load switched
by the MCR contacts.
Therefore, a suppressor is
needed across the line at
1756-M08SE 1756-M08SE 1756-M08SE
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the load side of the MCR
contacts.
Disc.
2FU
3FU
L1
L2
L3
L1
L2
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