Power Distribution - Parker H Series Installation & Service Instructions Manual

Industrial Automation Wiring and Grounding Guidelines
Figure 7 – Grounded AC Power-Distribution System with Master-Control Relay
Incoming
AC
The I/O circuits form a net
inductive load switched by
the CRM contacts. Therefore,
a suppressor is needed
across the line at the load
side of the CRM contacts.

Power Distribution

You can connect the power supply directly to the secondary
of a transformer (Figures 7 and 8). The transformer
provides DC isolation from other equipment not connected
to that transformer secondary. Connect the transformer
primary to the AC source; connect the high side of the
transformer secondary to the L1 terminal of the power
supply; connect the low side of the transformer secondary
to the neutral (common) terminal of the power supply.
Disc.
Suppressor
1FU
L1
2FU
L2
3FU
L3
H
1
H H
3
FUSE
X
1
Multiple E-Stop
Switches
Start
CRM
Controller
Power Supply
L1
CRM
Suppressor
Input
Module
Output Module
Wiring
Wiring Arm
Arm
Input
Sensor
Notes:
1 To minimize EMI generation, connect a suppressor across an
inductive load.
2 In many applications, a second transformer provides power to the
input circuits and power supplies for isolation from the output circuits.
3 Connect a suppressor here to minimize EMI generation from the
net inductive load switched by the CRM contacts. In some
installations, a 1µf 220Ω suppressor or 2µf 100Ω suppressor has
been effective.
1
L1
To Motor
L2
Starters
L3
H
4
2
2
Step-Down
Transformer
Grounded Conductor
X
2
CRM
1
Suppressor
GND
N or L2
3
Output
CRM
Actuator
9
Enclosure
Wall
Back-Panel
Ground Bus
Grounding-Electrode
Conductor to
Grounding-Electrode
Equipment- System
Grounding
Conductors
Connect When
Applicable
User DC
Supply
+ –
To DC I/O
Actuators/
Sensors
E115P