1-Channel, Isolated Current (20 mA) Analog Output Module for SCC—The SCC-CO is referenced to its own isolated ground, so it can tolerate up to 300 V of common-mode voltage between grounds (channel-to-channel or channel-to-chassis). The SCC-CO is installation rated for Category II, and it provides safety-working isolation of 300 V per module. Because the SCC-CO is isolated, you can cascade two SCC-CO modules to double the output range. There is a maximum of two SCC-CO modules per carrier.