Product Details
Product Overview
The 1746-IH16 functions as a high-density discrete input interface for the Allen-Bradley SLC 500 chassis. It provides 16 isolated channels designed specifically to sense high-voltage DC signals (125VDC nominal). This module bridges the gap between high-voltage field devices and the low-voltage logic of the PLC processor. Despite the manufacturer’s discontinued status, we offer 100% Brand New, original units to ensure the continued operation of your mission-critical control systems.
Technical Specifications
This module features a robust hardware profile designed for heavy-duty switching environments.
| Feature | Specification |
| Number of Inputs | 16 Channels |
| Voltage Category | 125V DC |
| Operating Voltage Range | 90–146V DC |
| Backplane Current (5V) | 0.085 A |
| Backplane Current (24V) | 0.000 A |
| Signal Delay (Max) | 8ms (On to Off) / 8ms (Off to On) |
| Weight | 1.00 lbs (0.45 kg) |
Engineering Advantages
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High-Voltage Direct Sensing: The 1746-IH16 eliminates the need for interposing relays when monitoring 125VDC circuits. This simplifies cabinet wiring, reduces points of failure, and saves significant DIN rail space.
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Enhanced Noise Immunity: The high-voltage threshold inherently rejects low-level electromagnetic interference (EMI) and crosstalk from adjacent AC cables, ensuring signal integrity in electrically "noisy" power plants or substations.
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Seamless Backplane Integration: The module slides directly into any available slot in a 1746 chassis. It draws minimal current from the SLC backplane, allowing engineers to maximize the I/O density without overloading the power supply.
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Rapid Fault Recovery: By utilizing 100% Brand New factory-sealed modules, maintenance teams avoid the risks associated with aged capacitors or degraded terminal blocks found in used equipment, ensuring immediate system restoration.
FAQs
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Can I use the 1746-IH16 in a remote I/O rack?
Yes. The module operates flawlessly in any local SLC 500 chassis or a remote 1747-ASB/ACNR adapter-linked rack, provided the backplane supports 1746 I/O.
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What is the primary difference between this and standard 24VDC modules?
The 1746-IH16 targets high-voltage utility and power generation applications. It requires a minimum of 90VDC to register an "On" state, whereas standard modules trigger at much lower thresholds.
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Does this module require a separate external power supply for the inputs?
Yes. You must provide the 125VDC field power to the input terminals. The module only draws logic-side power (5VDC) from the PLC backplane.
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Is this unit compatible with the SLC 5/01, 5/02, 5/03, 5/04, and 5/05 processors?
Absolutely. The 1746-IH16 maintains universal compatibility across the entire SLC 500 processor range, ensuring a versatile fit for any legacy system upgrade or repair.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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