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Control circuit specifications
When using an external power supply for transistor output
Sink logic type
Use terminal PC as a common terminal, and perform
wiring as shown below. (Do not connect terminal SD of the
drive unit with terminal 0V of the external power supply.
When using terminals PC-SD as a 24VDC power supply,
do not install an external power supply in parallel with the
drive unit. Doing so may cause a malfunction in the drive
unit due to undesirable currents.)
Source logic type
Use terminal SD as a common terminal, and perform
wiring as shown below. (Do not connect terminal PC of the
drive unit with terminal +24V of the external power supply.
When using terminals PC-SD as a 24VDC power supply,
do not install an external power supply in parallel with the
drive unit. Doing so may cause a malfunction in the drive
unit due to undesirable currents.)
QY40P type transistor
output unit
TB1
TB2
TB17
TB18
24VDC
SD
PC
STR
STF
Drive unit
24VDC
(SD)
Current flow
Constant
voltage
circuit
QY80 type transistor
output unit
Constant
voltage
circuit
PC
TB1
TB2
TB17
Fuse
TB18
STF
STR
SD
Drive unit
24VDC
(SD)
24VDC
Current flow