GE IS420UCSBH1A | Ethernet switch | 6 port.The GE IS420UCSBH1A is a controller module manufactured by General Electric as part of the Mark VIe Control Safety System Series. It is compatible with the EX2100e, LS2100e, and Mark VI Systems. The controller has a 600 MHz EP80579 Intel Processor and requires a minimum voltage of 18VDC and a maximum voltage of 30VDC. The nominal power rating is 24-28VDC, and the maximum current rating is 1.5 ADC.IS420UCSBH1A GEH-6725 Mark VIe and Mark VIeS