32-Point DC Input 1756-IB32K Allen Bradley

Product Overview

The Allen-Bradley 1756-IB32K is a conformal-coated 32-point digital input module for ControlLogix systems. It accepts 12/24 V DC sinking inputs in two groups of 16, providing high-density discrete signal acquisition with enhanced environmental protection.

Key Specs

• Inputs: 32 points (16 points per group)
• Voltage category: 12/24 V DC sink
• Operating range: 10-31.2 V DC
• Input delay: Hardware 380 μs max + user-selectable filter (0/1/2/3/18 ms)
• Current draw: 120 mA @ 5.1 V DC, 2 mA @ 24 V DC
• Power dissipation: 6.2 W max
• Isolation: 250 V continuous, inputs-to-backplane

Why Choose This

• 32-point density reduces per-point installation cost
• Conformal coating for harsh or corrosive environments
• User-configurable input filters for noise immunity
• Electronic keying prevents incorrect module insertion

Common Questions

• What terminal blocks are compatible? The 1756-TBCH (36-pin screw) or 1756-TBS6H (36-pin spring) removable terminal blocks.
• What does the K suffix indicate? Conformal coating for protection in corrosive atmospheres.
• Is per-point isolation provided? No, isolation is group-to-group and inputs-to-backplane.

Mounting Steps

1. Power down the chassis before module installation.
2. Insert the module into any available 1756 slot.
3. Attach the removable terminal block and wire field devices.
4. Configure input filters and electronic keying in Studio 5000.
5. Verify input status LEDs for proper operation.

Buying Advice

• Select 1756-IB32K for high-density input requirements in harsh environments.
• For individually isolated inputs, consider the 1756-IB16I instead.
• Verify total chassis power budget: 120 mA at 5.1 V DC per module.