Allen-Bradley 1746-IV8 SLC 500 DC Input Module 8 Channel

Allen-Bradley 1746-IV8 SLC 500 DC Input Module

Allen-Bradley 1746-IV8 is an 8-channel sourcing DC input module for SLC 500 systems. Operates on 10-30V DC with 8mA nominal input current. Single slot module with 8ms signal delay and LED status indicators. Weight: 0.3 kg (0.66 lbs).

Technical Specifications

Key Features

• 8 sourcing DC input channels for field device interfacing
• 10-30V DC wide input voltage range
• 8ms signal delay for both ON and OFF transitions
• Single slot module for SLC 500 chassis
• LED indicators for each input channel
• No external power supply required
• Compatible with auxiliary contacts, limit switches, and sensors

Installation Guidelines (Field Engineer Notes)

Chassis Installation: Insert module into any vacant slot in SLC 500 chassis. Power must be removed before installation to prevent electrical arcing.

Wiring: Use 14 AWG (2 mm) cables for signal termination. Connect sourcing field devices to input terminals. Common terminal is shared for all 8 channels.

Voltage Check: Verify 10-30V DC between input and common. Off-state voltage must be below 5V DC to be recognized as OFF.

Arcing Prevention: Do not remove or insert module with power applied. Electrical arcing can cause personal injury and damage contacts.

FAQs

Q1. What type of input does the 1746-IV8 support?
A1. The module supports sourcing DC inputs with 10-30V DC range. Compatible with auxiliary contacts, limit switches, and sensors.

Q2. What is the signal delay of this module?
A2. Both OFF to ON and ON to OFF transitions have an 8ms signal delay.

Q3. Does the module require external power?
A3. No. The module draws 50 mA from the backplane at 5V DC. No external power supply is required.