1756-IB16I | Allen-Bradley Isolated Input Module Supplier

What Is the 1756-IB16I?

When your control system demands precise and isolated discrete input monitoring, the 1756-IB16I provides a robust solution. This Allen-Bradley module is part of the ControlLogix series and features sixteen individually isolated input channels. Each channel accepts a 10-30 VDC input signal range with a nominal voltage of 24 VDC. Engineers use this module to interface pushbuttons, switches, and auxiliary contacts that deliver binary ON-OFF signals.

Key Features & Technical Specs

• The 1756-IB16I offers 16 individually isolated inputs for reliable signal separation.
• Operating voltage range is 10-30 VDC with a nominal input of 24 VDC.
• ON-state current ranges from 2 mA at 10 VDC to 10 mA at 30 VDC.
• Off-state maximum input current is 1.5 mA.
• Signal delay for ON transition: hardware delay of 1 ms max plus user-selectable filter time (0 ms, 1 ms, or 2 ms).
• Signal delay for OFF transition: hardware delay of 4 ms max plus user-selectable filter time (0 ms, 1 ms, 2 ms, 9 ms, or 18 ms).
• Backplane current draw is 100 mA at 5.1 VDC and 3 mA at 24 VDC, with total backplane power of 0.58 W.
• Cyclic update time ranges from 200 µs to 750 ms.
• Compatible removable terminal blocks include 1756-TBCH and 1756-TBS6H.

Installation & Setup

Installing the 1756-IB16I is straightforward. It fits into any slot of a 1756 ControlLogix chassis except the leftmost slot, which is reserved for the processor or communication adapter. Use the 1756-TBCH or 1756-TBS6H removable terminal block for wiring. Ensure the module is securely seated and the terminal block is fully engaged. For remote I/O configurations, verify the communication adapter supports the module.

Maintenance & Reliability

To maintain reliable operation, periodically inspect the 1756-IB16I for signs of dust or contamination. Ensure the chassis environment stays within the specified temperature range. Because the module uses solid-state components, it requires minimal routine care. Follow the manufacturer’s guidelines for inspection intervals to maximize service life.

Compatibility & Integration

The 1756-IB16I integrates seamlessly with any ControlLogix chassis. It works in local, remote, or distributed I/O architectures. The module uses standard 1756-series terminal blocks, simplifying replacement and migration. For specific system compatibility, refer to the ControlLogix documentation.

Troubleshooting & Common Issues

If an input channel fails to respond, first verify the wiring and terminal block connection. Check that the input voltage is within the 10-30 VDC range. If the signal delay seems excessive, review the selected filter time settings. For persistent issues, consult the module’s diagnostic indicators or contact Petro Auto Tech for support.

FAQ about 1756-IB16I

Q: What is the input voltage range of the 1756-IB16I?

A: The 1756-IB16I operates on an input voltage range of 10-30 VDC, with a nominal voltage of 24 VDC.

Q: How many input channels does the 1756-IB16I have?

A: It features sixteen (16) individually isolated input channels.

Q: What is the ON-state current requirement for the 1756-IB16I?

A: The ON-state current is 2 mA minimum at 10 VDC and 10 mA maximum at 30 VDC.

Q: What removable terminal blocks are compatible with the 1756-IB16I?

A: Compatible terminal blocks include the 1756-TBCH and 1756-TBS6H.

Q: What is the backplane power consumption of the 1756-IB16I?

A: The total backplane power is 0.58 W, drawing 100 mA at 5.1 VDC and 3 mA at 24 VDC.

Q: How can I reduce signal noise on the 1756-IB16I inputs?

A: Use the user-selectable filter times (0 ms, 1 ms, or 2 ms for ON transition; up to 18 ms for OFF transition) to filter noise. Refer to the manual for guidance.

Product Support & Availability

The 1756-IB16I is available from Petro Auto Tech. Please verify current lifecycle status and availability before ordering. Our team can assist with technical questions and provide documentation.