Allen-Bradley/Rockwell Automation 1771-IAD field wiring arm

The Allen-Bradley 1771-IAD is a discrete input module. This module is part of the 1771 family of Programmable Logic Controller (PLC). This module is designed to accept AC and DC signal voltages such as 120VAC with frequency of 50/60 Hz and 125VDC. It has Sixteen (16) input channels and compatible for installation in a variety of 1771 chassis such as 1771-A1B through A4B or later universal I/O chassis. It may also be installed in the 1771-AM1 and AM2 chassis.

The 1771-IAD is primarily used to interface discrete devices such as pushbuttons, switches of different varieties, auxiliary contacts from relays, contactors and other devices.

The 1771-IAD has an input signal delay such as 120V ac/60Hz: 5ms (+3ms) or 20ms(+5ms) selectable 120V dc: 3ms (+0.1ms) or 10ms (+1ms) selectable for Off to On transition and 25ms (+5ms) for 120V ac or dc for ON to OFF transition. It has an On state voltage range of 79 VAC to 138VAC or VDC. It has a maximum power dissipation of 8.8 Watts and minimum of 1.0 Watts with Thermal dissipation 30.1 BTU/hr, maximum and 3.42 BTU/hr, minimum. It has a backplane Current draw of 195 mA at 5V.

Technical specifications for 1771-IAD

Typical DC Signal Delay (Off)25 (+/- 5) ms

Typical AC Signal Delay (Off)25 (+/- 5) ms

Typical DC Signal Delay (On)3 (+/- 0.1) or 10 (+/- 1) ms

Typical AC Signal Delay (On)5 (+/- 3) ms

Max AC Off-State Current2.8 Miliamperes

Backplane Current195 Miliamperes

DC Operating Voltage79-138 Volts

AC Operating Voltage79-138 Volts

Voltage Category120 Volts AC/DC

Number of Inputs16 Inputs

Module TypeDigital AC/DC Input Module

Part Number/Catalog No.1771-IAD

Wiring Arm1771-WH

Dimensions3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)

BrandAllen-Bradley

ManufacturerRockwell Automation / Allen-Bradley

Module Location1771-A1B, A2B, A3B, A3B1, A4B, 1771-AM1 and AM2 chassis.