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Power sequence
• In order to effectively and easily achieve the expansion FP0 adapter power sequence, the
power of the expansion FP0 adapter shall be supplied by a service power supply for FP-XH
M8N control unit input.
• Power on the FP0 expansion unit before turning on the FP-XH M8N system power.
• Note the power sequence, the power of the FP-XH M8N system and the FP0 expansion unit
shall be turned off before the input and output power is switched off. If the input and output
power is shut off first, the control unit may sometimes detect the change of the input value
and cause an unexpected sequence of actions.
Operation
ON
OFF
Grounding of the FP-X expansion FP0 adapter and FP0 expansion unit
• The functional grounding wire (green) of the included cable shall be grounded. Depending
on the different service environments, sometimes there will be problems if grounded.
• The power line of the FP-X expansion FP0 adapter connects to the functional grounding
through a varistor. The varistor may be shorted when there is an abnormal potential between
the power line and the ground.
24 V DC
0 V
Functional grounding
Extended FP0 adapter power circuit
Power sequence
FP0 power → FP-XH M8N power, expansion FP0 adapter → input and output power
FP-XH M8N power, expansion FP0 adapter → FP0 power → input and output power
Varistor（82 V）
5.2 Wiring of Power Supply
5-7
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