Safety Inputs
The safety inputs have a redundant circuit design, and an error occurs if the inputs are mismatched for two or more seconds.
The safety inputs have five channels, with independent input terminals and one 24 V/GND terminal (COM) common to all five channels.
When connecting the wires, check the safety I/O connector pin assignments in the signal arrangement.
Safety Input Specifications
Interface specifications
To use the safety inputs, a SELV-certified external power supply is required.
The wire to be connected should be AWG24 to 16 or processed with ferrule terminals, and the length should be 20 m or less.
Check the XW4M/XW4N specifications for details on connectors and wire connections.
Available functions
The following functions are available when configured in "Safety Function Manager." For details on the settings, refer to the following manual.
"Robot Controller Safety Function Manual"
- Emergency stop
- Safeguard (SG)
- SLS function ON/OFF
- SLP function ON/OFF
Safety input electrical specifications
Input voltage range: +12 to 24 V ±10%
ON voltage: +11 V (Min.)
OFF voltage: +5 V (Max.)
Input current: Typ. 11 mA at +24 V
The input circuit uses a bidirectional photocoupler, so two types of connections are possible. Refer to the connection examples.
Connected peripherals
Safety devices that can be connected to safety inputs are shown in the following table.
Safety devices with diagnostic pulses should have a maximum pulse width of 500 us and a minimum diagnostic pulse interval of 20 ms.
| Device Name | Certification |
|---|---|
| Laser curtain | IEC 61496-1 Type 4 |
| Laser scanner | IEC 61496-1 Type 3 |
| Safety PLC | IEC 61131-2 |
| Safety switch | IEC 60947-5-1 |