The Allen-Bradley 1785-O5G PLC 5 Coprocessor Module serves as a backup module. This module comes with an RS-232-C Port and the backplane current of this module is 2.7 A at 5V DC. This module has a maximum of 3072 analog I/O. The I/O Scan Times Per Rack of this module are 10 ms at 57.6 kbits/s, 7 ms at 115.2 kbits/s, and 3 ms at 230.4 mbits/s. The Allen-Bradley 1785-O5G is intended for use in a Pollution Level Industry Environment 2, in excessive Category II applications (as defined in the publication of IEC 60664-1). Please remember that this power supply can operate at an altitude of up to 6562 feet without derating. If you connect or disconnect the cable and the terminal block and if you install or remove the 1785-O5G when the power is on, an electrical arc may occur. This can cause injury, damage, or even an explosion in hazardous locations. Make sure the power is removed and that the area is not hazardous before continuing. The operating temperature is 0 to 60 °C (32 to 140 °F), the storage temperature is -40 to 85 °C (-40 to 185 °F), and the relative humidity is 5 to 95% without condensation. The Allen-Bradley 1785-O5G has an operating shock of 30g (3 pulses, 11 ms) and a nonoperating shock 50g (3 pulses, 11 ms). This module must be installed in an enclosure with at least IP54-level protection for operation in Zone 2 environments.