Allen - Bradley 1794 - IB16 is a digital input module. Here are its brief parameters:
Product Type: Flex I/O digital input module
Number of Inputs: 16 sinking current inputs
On - state Voltage: Min. 10 VDC, Nom. 24 VDC, Max. 31.2 VDC
On - state Current: Min. 2.0 mA, Max. 12.0 mA
Off - state Voltage: Max. 5 VDC
Off - state Current: Max. 1.5 mA
Nominal Input Impedance: 4.6 kΩ
Flexbus Current: 30 mA @ 5V DC
Power Dissipation: Max. 6.1 W @ 31.2 VDC
Operating Temperature: 0 to 55 °C (32 to 131 °F)
Storage Temperature: - 40 to 85 °C (- 40 to 185 °F)
Vibration: 5 g @ 10 to 500 Hz
Operating Shock: 30 g
Mounting: DIN rail or direct panel mounting
Status Indicators: 16 yellow status indicators for each input channel