Mitsubishi Electric Melsec-Q172DCPU User Manual page 118

2 SYSTEM CONFIGURATION
Measure the input voltage to Q173DSXY with the input connector part. Be sure to select DC
power supply within the range of 21.6VDC to 26.4VDC included ripple voltage and spike voltage
and wire.
When wiring in the Q173DSXY, be sure that it is done correctly by checking the product's rated
voltage and the terminal layout. Connecting a power supply that is different from the rating or
incorrectly wiring the product could result in fire or damage.
Wire the cable correctly. Wrong wiring may damage the internal circuit.
Always use a shield cable for connection of the connector and external equipment, and avoid
running it close to or bundling it with the power and main circuit cables to minimize the
influence of electromagnetic interface. (Separate them more than 100mm(0.33ft.) away.)
Connect the shield wire of the connection cable to the FG terminal of the external equipment.
Make parameter setting correctly. Incorrect setting may disable the protective functions such
as safety functions.
Always wire the cables when power is off. Not doing so may damage the circuit of modules.
Do not touch the case of Q173DSXY while the power is ON and for a short time after the
power is turned OFF. In this timing, these parts become very hot and may lead to burns.
POINTS
(1) Wire the I/O power supply input (24VDC, 0V common) supplied to Q173DSXY
to two pins of each conversion modules.
(2) Separate all external wirings into 2 lines to configure the safety circuit. Do not
wire between the two terminal block conversion modules for I/O power supply
supplied to Q173DSXY (24VDC, 0V common). Be sure to separately wire the
modules. If one break affects both wiring of Motion CPU side and PLC CPU
side, the safety system may not execute properly.
Q61P Q173DS Q173D
QnUD
CPU SXY
CPU
Good wiring
Motion CPU side
Terminal
block
Relay
Power supply
terminals
+24V
GND
(Note): Wire breakage doesn't affect the other equipment.
PLC CPU side
Power input
terminals
(Note)
Wire breakage
CAUTION
2 - 85
Bad wiring
Motion CPU side
Terminal
block
Relay
Power input
Power supply
terminals
terminals
+24V
GND
(Note): Wire breakage affect the other equipment.
PLC CPU side
(Note)
Wire breakage