User`s manual

3-21
3
Installation and wiring
3. Installation and wiring
• When using an external power supply, do not connect to the internal interface
power of the robot driver. If connected, current may flow as shown in figure (e)
below when the external power supply is shut off, causing the input to turn on.
P24
PLC
4.7k7
DC24V
CM1
S
C
Input
(e) Current flow when external power supply is shut off
Output
Shorted when
power is shut off.
Example of sink
type output module
Robot driver
Programmable
controller
External power supply
(DC24V)
Output
control
• If using switch contacts or relay contacts as the contact input signal, then use
contacts such as crossbar twin contacts that make good contact even at weak
currents or voltages.
• Do not short the internal interface power P24 to CM1. The robot driver may fail.
• The electrical specifications for input signals are shown in the following table.
(Power supply voltage 24V DC)
Item Unit Minimum Maximum Condition
Input impedance k
Ω
4.5 5.7
Input current at OFF mA 0 0.3
Input current at ON mA 3.0 5.2
Power supply voltage
24V DC