Allen-Bradley 1756-IA32 ControlLogix Digital I/O Module

The Allen-Bradley 1756-IA32 is a ControlLogix Digital I/O Module. This AC input module has a display where users can check its input and communication status, as well as the module health. This particular module has 32 inputs available, with 16 points available in each group. The removable terminal block housings or RTB, compatible with the 1756-IA32 are 1756-TBCH and 1756-TBS6H. The continuous isolation voltage of this module is 250 V. Its voltage category is 120 V AC and 50/60 Hz, same with its input voltage. The module’s current draw at 24 V is 2mA and 165 mA at 5.1 V. The operating voltage ranges from 74 to 132 V AC and 47 to 63 Hz. 0.9 W is the 1756-IA32 module's total backplane power and the maximum inrush current is 390 mA. Input delay times, from screw to backplane, are present in this module from off to on hardware delay is 1.5 ms nominally or 10 ms maximum plus user-selectable filter time (1 ms or 2 ms), while from on to off, the hardware delay is 1 ms nominally or 8 ms maximum plus user-selectable filter time (9 ms or 18 ms). The maximum power dissipation is 6.1 W at 60 Degrees Celsius and thermal dissipation is 20.8 BTU/hour. On an off-state, the maximum voltage is 20 V and the maximum current is 2.5 mA. On the other hand, the on state’s current ranges from a minimum of 5 mA at 74 V AC to a maximum of 15 mA at 132 V AC.

Technical specifications for 1756-IA32

ManufacturerRockwell Automation

Backplane Current at 24 Volts2 milliamperes

Power Dissipation (Max)6.1 W @ 60 °C (140 °F)

Operating Voltage Range74-132 VAC

Input Voltage120 VAC Volts AC

Module TypeDigital DC Input Module

SeriesControlLogix

Part Number/Catalog No.1756-IA32

BrandAllen-Bradley

No. of InputsThirty-Two (32) Inputs

Module KeyingElectronic

Input Delay Time, OFF to ONHardware delay: 1.5 ms nom/10 ms max + filter time

Input Delay Time, ON to OFFHardware delay: 1 ms nom/8 ms max + filter time

Thermal Dissipation20.8 BTU/hr @ 60 °C (140 °F)

Removable Terminal Block(s)1756-TBCH; 1756-TBSH

Inputs32

Input Delay TimeProgrammable 9 or 18 milliseconds

Minimum Operating Current5 milliamperes at 74 Volts AC

Maximum Operating Current10 milliamperes at 132 Volts AC

Maximum Input Current, Off-State2.5 milliamperes

Backplane Current at 5 Volts165 milliamperes

Removeable Terminal Block(s)1756-TBCH, 1756-TBS6H