The Allen-Bradley 1746-IO12DC is a combination digital I/O module designed for the SLC 500 programmable controller platform. This module integrates six 24V DC sinking inputs and six relay contact outputs into a single-slot footprint. By combining both input and output capabilities, it provides an efficient solution for small-scale control applications or distributed I/O systems, reducing the required chassis space and overall system cost.
Features
Six 24V DC sinking inputs with a 10 to 30V DC operating range.
Six flexible relay contact outputs capable of switching AC or DC loads.
Single-slot module design for SLC 500 chassis.
Optimized for mixed-signal field device interfacing.
Integrated status indicators for individual I/O points.
Applications
This module is suitable for various industrial control tasks, including interfacing with DC-based proximity sensors, limit switches, and photoelectric sensors. The relay outputs allow for the direct control of AC motor starters, solenoid valves, and various DC-operated actuators, making it a versatile choice for compact machine control panels.
Technical Specifications
Parameter
Specification
Model
1746-IO12DC
Inputs
6 (24V DC Sinking)
Outputs
6 (Relay Contacts)
Input Voltage Range
10 to 30V DC
Output Voltage (AC)
5 to 265V AC (47-63 Hz)
Output Voltage (DC)
5 to 125V DC
Input Signal Delay
8 ms (Nominal)
Output Signal Delay
35 ms (ON) / 45 ms (OFF)
Backplane Current (5V)
80 mA
Backplane Current (24V)
60 mA
Operating Temperature
0 to 60 degC (32 to 140 degF)
Installation Guidelines
Ensure the SLC 500 chassis power is disconnected before installing or removing the module.
Insert the module into an available slot in the SLC 500 chassis and secure it using the integrated locking tab.
Use appropriate wire gauges for terminal block connections and ensure all connections are tightened to the manufacturer's specified torque.
Maintain proper cable routing to separate signal wiring from high-voltage AC or high-EMI sources to prevent signal interference.
Ensure adequate ventilation within the enclosure to maintain the operating temperature within the specified 0 to 60 degC range.
FAQ
Is this module compatible with all SLC 500 chassis?
Yes, the 1746-IO12DC is designed for the standard SLC 500 chassis and occupies a single slot. Ensure your power supply has sufficient capacity to handle the backplane current requirements of the module.
Can the relay outputs switch both AC and DC loads?
Yes, the relay outputs are highly flexible and can handle AC loads from 5 to 265V and DC loads from 5 to 125V, provided the continuous current ratings are not exceeded.
