ET-GT-ST-1 Performance Specifications Max. I/O modules 128 with expanders 20 without expanders Max. I/O per gateway 1024 (any mix) Ethernet port 10BaseT at 10Mbps Ethernet protocols Modbus/TCP (Open Modbus) and SIXNET (I/O for Windows) Serial protocols SIXNET, Modbus ASCII and Modbus RTU RS232 port TD, RD, RTS, CTS, DTR, GND Max. serial port baud rate 38,400 Ethernet isolation 1200 VRMS 1 minute Required supply voltage 18-30 VDC (1.6 watt typical) (ET-GT-ST-1 only) Operating temperature range -30 to 70° C Storage temperature range -40 to 85° C Humidity (non-condensing) 5 to 95 % Electrical safety UL 508, CSA22.2/14; EN6101-1 (IEC1010), CE EMI emissions FCC part 15, ICES-003, Class A; EN55022, CE EMC immunity EN50082-1 (IEC801-2,3,4) CE Hazardous locations UL 1604, CSA C22.2/213-M1987, (Class I, Div. 2, Groups A, B, C, D), EN50021 (zone 2)