Digital input
EP1908 | 8-channel digital input, TwinSAFE, 24 V DC
M12 I/O
connection socket
Signal status display
Labelling areas
Power supply
status display:
Box supply (US)
Auxiliary voltage (UP)
1 | Pulse output 1
2 | Input 1
3 | Pulse output 2
4 | Input 2
5 | n.c.
1 | Tx+
2 | Rx+
3 | Rx-
4 | Tx-
1 | + 24 V DC Us
2 | + 24 V DC UP
3 | GND
4 | GND
Power supply feed
Power supply down-
stream connection
signal input
signal output
extended temperature range

EP1908-0002 | 8-channel digital input, TwinSAFE, 24 V DC

The EP1908 TwinSAFE EtherCAT Box is a digital input box for sensors with potential-free contacts for 24 V DC. It has 8 fail-safe inputs. The EP1908 meets the requirements of IEC 61508 SIL 3 and DIN EN ISO 13849 PL e.

Technical data EP1908-0002
Connection technology M12, screw type
Safety standard DIN EN ISO 13849-1:2008 (Cat 4, PL e) and IEC 61508:2010 (SIL 3)
Number of inputs 8
Input connections M12, screw type
Protocol TwinSAFE/Safety over EtherCAT
Bus interface 2 x M8 socket, shielded, screw type
Status display 8 LEDs: 1 per input
Response time typ. 4 ms (read input/write to bus)
Fault response time ≤ watchdog time (parameterisable)
Power supply connection feed: 1 x M8 male socket, 4-pin; downstream connection: 1 x M8 female socket, 4-pin
Bit width in the process image input: 6 byte; output: 6 byte
Special features 8 safe inputs
Weight approx. 165 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 65/66/67 (conforms to EN 60529)/variable
Approvals CE, UL, TÜV SÜD
ZK1090-3xxx-xxxx Cables for EtherCAT signal in- and -output
ZK2000-6xxx-xxxx Cables for M12 I/O connection sockets
ZK2020-3xxx-xxxx Cables for M8 power supply