Allen - Bradley 1794 - ASB is a Flex I/O communication adapter. The main parameters are as follows:
Product Type: Flex I/O remote I/O adapter modules
I/O Capacity: 8 modules
Input Voltage Rating: 24 VDC nominal
Input Voltage Range: 19.2 V to 31.2 VDC (includes 5% AC ripple)
Communication Rate: 57.6 Kbps, 115.2 Kbps, 230.4 Kbps
Indicators: Adapter active - green; Adapter fault - red; Local fault - red
Flexbus Output Current: 640 mA max.
Isolation Voltage: 500 VAC between user power and flexbus
Power Consumption: 450 mA max. from external 24 V supply
Power Dissipation: 4.6 W max. at 31.2 VDC
Thermal Dissipation: 15.7 BTU/hr at 31.2 VDC
Mounting: DIN rail
Dimensions: Approximately 6.9 x 6.8 x 8.7 cm
Shipping Weight: 5 kg