Siemens 6ES7322-5RD00-0AB0 SIMATIC S7-300 SM 322 4xDO 15V/20mA Ex Hazardous Area PLC I/O Module

The Siemens 6ES7322-5RD00-0AB0 is a SIMATIC S7-300 SM 322 digital output module with 4 isolated outputs rated 15 V / 20 mA, built to drive actuators located in a hazardous area. It draws 160 mA from the 24 V DC load supply, is PTB tested under number Ex-96.D.2102X, and carries an [EEx ib] IIC hazardous-area marking.

Technical Specifications

Selection Notes

At 15 V / 20 mA rated output, this module suits intrinsically safe actuators whose loop is specified for that voltage/current pair rather than the 24 V / 10 mA pair used on the other SM 322 output variant — check the actuator's own Ex(i) entity parameters against Uo 15.75 V / Io 85 mA / Po 335 mW before mixing modules on the same project. The 200 Ohm maximum load resistance sets the longest field-wiring loop the output can drive at rated current; a lower-resistance actuator leaves margin, a higher one will not reach rated current. Short-circuit protection is electronic, so a field fault trips without replacing a fuse.