... Time, Fail-Safe Configuration(Hold/ Fallback on per channel basis)PSS 21H 2Z5 B4FBM207Channel Isolated, 16 DIN ... Mbps Ethernet, RedundantPSS 21H-2Z33 B4FBM237Channel isolated, 8 channel 0-20mA output, redundantAnalog I/OOutput Fail-Safe Configuration ... Hold/ Fallback on per channel basis)PSS 21H-2Z37 B4FBM241Channel Isolated, 8 channel voltage monitor, 8 channel DOUT pulse, external powerDiscrete ...