iDect FC6A series User Manual page 148

3: I
NSTALLATION AND
Expansion interface module
The power supply specification of the expansion interface module is the 24V DC power type.
■ When Power Is Turned Off
The power supply voltage that can be used with the expansion interface module is 20.4 to 28.8V DC.
•
Do not use the FC6A Series MicroSmart outside of the power supply voltages listed above.
Warning
When using the expansion interface module and an external device that carries the risk of causing a serious accident has
been connected, implement measures in the external circuit (such as voltage monitoring) so that the device will function
safely when there is a failure.
The power failure detection voltage varies depending on the usage conditions of the inputs and outputs, but a power failure is
•
normally detected when the power supply voltage is less than 20.4V DC.
A momentary power interruption of 10 ms or less is not recognized as a power failure when the power voltage is at the rated voltage.
•
■ Inrush Current at Powerup
An inrush current of 35 A or lower flows through the expansion interface module when powered on. Use a power supply with
sufficient capacity.
When using the CPU module and expansion interface module with separate power supplies, turn the power on and off in the
Caution
following order.
Power-up: Expansion interface module → CPU module
Power-down: CPU module → Expansion interface module
If the expansion interface module power supply is shut off before the CPU module, the I/O for all connected expansion
modules will not be updated.
Power Supply Wiring
Make the power line as short as possible. For details, see "Recommended Ferrule List" on page 3-35.
•
Run the power line as far away as possible from motor lines.
•
Note:
Review the following items when there is a risk of malfunction due to electric shock and noise.
Ground the PE and FE terminals with D-type ground (type 3: ground resistance of 100 Ω or lower).
•
Do not use a shared ground wire for the FC6A Series MicroSmart and motor equipment.
•
For ground wire details, see "Recommended Ferrule List" on page 3-35.
•
Power Supply Terminal Wiring Method
When wiring the power supply to the CPU module, the power supply terminals are removed from the CPU module, wired, and then
once again attached to the CPU module.
The following procedure describes how to remove and attach the power supply terminals.
■ Removing the Power Supply Terminals
Slowly rotate the power supply terminals cover in the direction of the arrow.
1.
3-18
W
IRING
+
External
Power Supply
-
24V DC
Power Supply Terminals
Power Supply Terminals Cover
FC6A S M S
ERIES ICRO MART
Expansion Interface Module
+
24V DC
-
Power Input
FE
CPU Module
A - -O T U ' M
LL IN NE YPE SER S ANUAL
FC9Y-B1722