The WAGO-I/O-SYSTEM 750 • 11Power supplyModular I/O SystemETHERNET TCP/IP2.4 Power supply750-630 750-650750-400 750-410 750-403 750-454 750-467 750-461750-612 750-512 750-512 750-513 750-610 750-552750-550 750-600750-616~24V 24V 24V230V12Fig. 2-10: Power supply g01xx02x1 – Power supply System2 – Power supply Field-sideThe power supply on the field side is electrically isolated from the system sup-ply. In this manner sensors and actuators can be supplied and fused by a sepa-rate voltage source.If a non-regulated power supply is used for the coupler/controller electronics24 V voltage supply, it must be filtered through a capacitor (200 μF per 1 Aload current). A back-up capacitor module (Order-No. 288-824) was devel-oped for the WAGO-I/O-SYSTEM. This module serves to regulate a noisy24 V DC voltage supply and to keep the ripple voltage within specified limits.These fluctuations could be caused by a voltage interruption on the primaryside, a secondary side overload or the switching of ”non quenched“ inductanceor capacitance.WarningThe supply module’s + and –, which are permanently integrated on thebuscouplers, must be supplied with 24 V DC only.120 V AC and 230 V AC can only be supplied via modules 750-609, 750-611and 750-612!WarningThe ground (earth) field side contact should be disconnected when testing theisolation. Otherwise the results could be wrong or the module could be de-stroyed.