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MITSUBISHI CNC
4. Wiring and Connecting
4.2 Wiring to the Power Supply Module
The following diagram shows the wiring example of power lines, grounding lines, etc. to the basic base
unit and the extension base unit.
AC
Connect to 24VDC terminals
of I/O module that requires
24VDC internally.
*1: The ERR terminal turns ON/OFF as described below.
<When the power supply module is mounted on the main base unit>
The terminal turns OFF (opens) when the AC power is not input, a CPU module stop error
(including a reset) occurs, or the fuse of the power supply module is blown.
<When the power supply module is mounted on the extension base unit>
The terminal is always OFF(open).
*2: Be sure to ground the LG terminal of Q64P and Q64PN, which are used as protective earth
(PE).
(Note 1) Use the possibly thickest (up to 2 mm
Always use crimp terminals for the terminal block wiring. To prevent a short circuit caused by any
loosen screws, use 0.8mm thick crimp terminals with insulation sleeves. Up to 2 terminals can be
attached to a terminal area.
(Note 2) Be sure to ground the earth terminal LG(PE) and FG (Ground resistance: 100Ω or less). If LG(PE)
terminals and FG terminals are connected without grounding the wires, the modules may be
susceptible to noise.
In addition, since the LG terminals have potential of 1/2 input voltage, the operator may receive an
electric shock when touching metal parts.
(Note 3) No system error can be detected by the ERR terminal of an extension base unit. (ERR terminal is
always set off.)
70
100/200VAC
Fuse
AC
24VDC
DC
Ground
wire
Grounding
Extension
cable
100VAC
Ground
wire
Grounding
2
) wires for the 100/200 VAC and 24 VDC power cables.
CPU base unit (Q38B)
Q61P/Q63P/Q64P/Q64PN
QxxUD(H)CPU
ERR *1
LG(PE) *2
INPUT
100-240VAC
Extension base unit (Q68B)
Q61P/Q63P/Q64P/Q64PN
I/O module
ERR *1
LG(PE) *2
INPUT
100-240VAC
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