EL2904 | BECKHOFF Safe output terminal

The EL2904 is a safe output terminal with digital outputs for connecting actuators (contactors, relays, etc.) with a maximum current 0.5 A (24 VDC). The Bus Terminal has 4 fail-safe outputs.The EL2904 meets the requirements of IEC 61508:2010 SIL 3, DIN EN ISO 13849-1:2006 (Cat 4, PL e), NRTL, UL508, UL1998 and UL991.The TwinSAFE terminal has the typical design of an EtherCAT terminal.Number of outputs 4Status display 4 (one green LED per output)Error reaction time ≤ watchdog timesOutput current per channel max. 500 mA, min. 20 mA with parameter current measurementactive setActuators When selecting actuators please ensure that the EL2904 testpulses do not lead to actuator switching.Cable length between actuator and terminal unshielded max. 100 mshielded max. 100 mWire cross section min. 0.75 mm2Input process image 6 bytesOutput process image 6 bytesEL2904 supply voltage (PELV) 24 VDC (–15%/+20%)Current consumption via E-bus approx. 221 mAPower dissipation of the terminal typically 2 W