The Allen-Bradley 1791DS-IB12 CompactBlock DeviceNet module is a safety I/O module that has 12 current sinking safety inputs, as well as 4 current sourcing test outputs. Its input current is 6 mA, with a maximum current of 1 mA when in the off-state. The voltage is a minimum of 11 Volts DC when in the on-state and a maximum of 5 Volts DC when in the off-state. The module's output has a 1.2 Volts maximum residual voltage, a 0.7 A rated output current, and a 0.1 mA maximum leakage current. The 1791DS-IB12 module's I/O power supply voltage ranges from 20.4 to 26.4 Volts DC, with a nominal voltage of 24 Volts DC, while its communications power supply voltage is 11 to 25 Volts DC, and its communications current consumption is 110 mA at 24 Volts DC.
Leave 1.96 inches of space above and below the 1791DS-IB12 so that it will have sufficient ventilation and wiring space. Do not remove the module's shield until after wiring it.
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Mount and Wire the Module
Mount the Module
- Use a DIN rail that is 35 mm (1.38 in.) wide for placing the module in the control panel.
- Mount the module to DIN rails with endcap attachments, so thatvibration does not cause it to fall.
- Leave at least 50 mm (1.97 in.) above and below the module to allowadequate ventilation and room for wiring.
Wire the Module
- Do not share communication lines and input/output lines with high-voltage lines.
- Wire correctly after confirming the signal names of all terminals.
- Do not remove the label from a unit before wiring. Always remove label after completing wiring to achieve proper heat dispersion.
- Before connection, process stranded wire with insulation-covered bar terminal (DIN 46228-4 standard compatible type) at its ends.
- Mount screws for communication and I/O connectors correctly at 0.25 Nm…0.3 Nm (2.21 lb-in…2.65 lb-in).
Specifications
| Part Number | 1791DS-IB12 |
| Brand | Allen-Bradley |
| Power Consumption | 110 mA at 24 Volts DC |
| Operating Voltage Range | 20.4 to 26.4 Volts DC |
| Number of Inputs | 12 |
| Input Type | Single-Channel |
| On-State Input Voltage | 11 Volt DC minimum |
| Off-State Input Voltage | 5 Volts DC maximum |
| Number of Outputs | 0 |
| Output Type | N/A |
| Dimensions | 2.68 x 6.70 x 2.84 inches |
| Weight | 0.4 kg |
| Dimensions | 2.68 x 6.70 x 2.84 inches |
| Weight | 0.4 kg |
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