1746-IV8 | Allen-Bradley 24VDC Sourcing Input Module Supplier

Introduction to the 1746-IV8

When your SLC 500 system requires dependable digital input processing, the 1746-IV8 from Allen-Bradley delivers eight 24VDC sourcing channels in a single group. This module is designed to interface with auxiliary contacts, limit switches, and sensors, converting field signals into usable data for your control logic. With a backplane current draw of just 50 milliamps at 5VDC, it minimizes power consumption while maximizing slot efficiency.

Key Features & Technical Specs

• Input voltage range: 10-30VDC, with nominal input current of 8 mA at 24VDC.
• Signal delay: 8 ms for both ON and OFF transitions, ensuring predictable response.
• Off-state voltage: max 5.0VDC; off-state current: max 1 mA.
• Operating temperature: 0 to +60°C; storage temperature: -40 to +85°C.
• Relative humidity: 5 to 95% non-condensing.

Unique insight: The 8 ms symmetrical signal delay reduces timing uncertainty in control loops, helping to avoid nuisance trips and improving process consistency—a key factor in minimizing costly downtime.

Cost-Efficient Applications

In material handling and packaging lines, the 1746-IV8 reliably reads sensor states without external power supplies, lowering installation costs. Its single-group design simplifies wiring, reducing labor time. By sourcing directly from the backplane, it eliminates the need for separate field power modules, further cutting system expense.

Installation & Setup

Install the 1746-IV8 into any vacant slot of an SLC 500 chassis. Always remove power from the rack before insertion or removal to prevent electrical arcing. Use 14 AWG (2 mm) cables for signal termination. The module occupies one slot and draws 50 mA at 5VDC from the backplane; no external power supply is required.

Maintenance & Reliability

Routine inspection of LED indicators and terminal connections helps maintain uptime. The module’s wide operating temperature range (0 to +60°C) and 5-95% humidity tolerance suit harsh industrial environments, reducing replacement frequency and long-term costs.

Compatibility & Integration

The 1746-IV8 integrates with any SLC 500 processor and chassis. It supports sourcing inputs only; verify your field devices are sourcing-type. The number of modules per system depends on the host processor’s I/O capacity and available slots.

FAQs about the 1746-IV8

Q: What is the input voltage range of the 1746-IV8?

A: The input voltage range is 10-30VDC, with a nominal input current of 8 mA at 24VDC.

Q: How many input channels does the 1746-IV8 have?

A: It has eight input channels in a single group.

Q: What is the signal delay for the 1746-IV8?

A: Both ON and OFF signal delays are 8 ms maximum.

Q: Does the 1746-IV8 require an external power supply?

A: No, it draws 50 mA at 5VDC from the backplane and does not need external power.

Q: What is the maximum off-state voltage?

A: The maximum off-state voltage is 5.0VDC, and the maximum off-state current is 1 mA.

Product Support & Availability

The 1746-IV8 is in stock and ready to ship from Petro Auto Tech. Please verify current lifecycle status and availability with our team before ordering.