3-10
3
I/O INTERFACE
3-4 I/O Circuits
3-4 I/O Circuits
This section provides the SRCP controller I/O circuit specifications and examples of how the I/O
circuits should be connected. Refer to these specifications and diagrams when connecting to external
equipment such as a PLC.
3-4-1 I/O circuit specifications
■ Input Power
DC24V±10% (supplied through EXT.CN)
■ Input Circuit
Excluding emergency stop input circuit
Insulation method: Photocoupler insulation
Input terminal: Relay contact or NPN open collector transistor connected between
input terminal and 0V terminal.
Input response: 30ms max.
Input current: 5mA/DC24V
Input sensitivity: Current on: 3mA min.
Current off: 1mA max.
Emergency stop input circuit
Input terminal: Relay contact connected between emergency stop inputs 1 and 2
(between EMG1 and EMG2).
Input response: 5ms max.
Input current: 40mA/DC24V
■ Output Circuit
Insulation method: Photocoupler insulation between internal circuit and output tran-
sistor
Output terminal: NPN open collector output of all collective output common termi-
nals (0V side)
Output response: 1ms max.
Max. output current: 50mA/DC24V per output
Residual ON voltage: 1.5V max.
■ Pulse Output Circuit
Output method: Line driver (26LS31 or equivalent)
Maximum output current:
20mA
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