Flex I/O Digital Input Module Allen-Bradley 1794-IH16 125VDC

Product Overview

The Allen-Bradley 1794-IH16 is a digital input module from the Flex I/O series. It provides 16 non-isolated input points. The module operates at 125 Volts DC. It has a North American Hazardous Location approval. This makes it safe for dangerous industrial environments. The 1794-IH16 uses screw clamp terminals for wiring. It works with many terminal bases like the 1794-TB3. The module offers reliable performance in harsh conditions.

Application Scenarios

This module fits into automation systems that need high-voltage DC sensing. Use it in manufacturing plants, oil refineries, and chemical facilities. The hazardous location rating allows installation in explosive areas. It monitors limit switches, push buttons, and sensors. The 16 inputs handle multiple signals efficiently. Many industries use the 1794-IH16 for process control. It is ideal for applications requiring 125VDC input.

Technical Specifications

The module has 16 input points. Voltage type is DC. Nominal voltage is 125 Volts DC. Minimum on-state voltage is 90 VDC. Maximum on-state voltage is 146 VDC. Maximum off-state voltage is 20 VDC. Nominal current is 2 mA. Minimum on-state current is 1 mA. Maximum on-state current is 3 mA. Maximum off-state current is 0.8 mA. Power dissipation is 6 Watts at 146 VDC. Thermal dissipation is 20.47 BTU per hour at 146 VDC. Dimensions when installed are 3.7 x 3.7 x 2.7 inches. Dimensions when not installed are 1.8 x 3.7 x 2.1 inches. The module has no isolation between inputs. It supports daisy-chaining with compatible terminal bases.

Installation & Maintenance Guide

Mount the module onto a compatible terminal base. Secure the base onto a DIN rail. Tighten screws to 0.56-0.79 Nm torque. Connect field wiring to the terminal strips. Use wire sizes from 0.34 to 3.3 mm². Ensure proper polarity for DC voltage. The module does not require regular maintenance. Check connections periodically for tightness. Replace the module only if faulty. Use only Allen-Bradley approved components.

Packing List

The package includes one 1794-IH16 digital input module. It also includes installation instructions. No terminal base is included. Order a separate terminal base like 1794-TB3. The module is shipped in an anti-static bag. Shipping methods include Fedex, UPS, or DHL. Handle the module with care to avoid damage.