1746-IC16 Allen-Bradley SLC 500 Digital DC Input Module
Product Introduction
The 1746-IC16 module is part of the reliable SLC 500 series from Allen-Bradley. It provides 16 sinking input channels rated for nominal 48V DC operation. You can use this I/O module in non-hazardous industrial locations and hazardous areas with Class 1, Division 2, Groups A, B, C, or D ratings. Its high channel count saves chassis space while handling demanding DC input applications.
Technical Specifications of the 1746-IC16
The Allen-Bradley 1746-IC16 supports a voltage range from 30 to 55V DC at 60°C, or up to 60V DC at 55°C. Each input operates as a sinking type. The module draws only 85 mA (0.085A) from the 5V DC backplane and 0 A from the 24V DC backplane.
Signal delay is very fast at 4 milliseconds for both ON and OFF transitions. The off-state current (leakage) is 1.5 mA, and the off-state voltage loss reaches 10V DC. Nominal input current at 48V DC is 4.1 mA.
Circuit isolation between the backplane and inputs is rated at 1500V AC for 60 seconds. Dielectric withstand voltage is also 1500V AC. The 1746-IC16 uses a Removable Terminal Block (RTB) for easy wiring.
Moreover, this module works with I/O connection accessories 1746-HT and 1746-HCA. Its step response is 100 ms in and 2.5 ms out.
Mechanical and Environmental Ratings
The 1746-IC16 operates reliably between 0°C and 60°C (32°F to 140°F). It handles non-condensing humidity from 5% to 95%. For storage, the temperature range expands from -40°C to 85°C (-40°F to 185°F).
Vibration tolerance reaches 1.0G at 5–200 Hz, and shock resistance is rated at 30G (three directional pulses for 11 ms). These ratings make the 1746-IC16 suitable for demanding industrial environments.
Installation Guidelines for the 1746-IC16
First, ensure the SLC 500 chassis is powered off before inserting the 1746-IC16. Align the module with the card guides and press firmly until the latches click. Next, wire field devices to the Removable Terminal Block (RTB) using proper wire gauges. For easier termination, use 1746-HT or 1746-HCA wiring arms. Then, label each input clearly for future maintenance.
Never insert or remove the 1746-IC16 while power is applied. Additionally, keep the module away from moisture exceeding the specified humidity range.
Packaging List
1 x 1746-IC16 Allen‑Bradley SLC 500 DC input module
1 x Removable Terminal Block (RTB)
1 x quick reference guide
Note: Certificates and warranty documents are not included in this package.
Shipping & Delivery
We ship all orders worldwide via FedEx, UPS, or DHL. Tracking numbers are provided within 24 hours after dispatch.
Frequently Asked Questions (FAQ)
1. Can the 1746-IC16 be used in hazardous locations?
Yes, the 1746-IC16 is approved for Class 1, Division 2, Groups A, B, C, and D hazardous industrial environments under North American standards.
2. What is the signal delay time of the 1746-IC16?
The signal delay is 4 milliseconds for both ON and OFF states. This fast response suits high-speed control applications.
3. Does the 1746-IC16 work with 48V DC sensors only?
It accepts a voltage range from 30 to 55V DC (or up to 60V at 55°C), so 48V DC sensors are ideal. However, sensors within this broader range also operate correctly.
4. How much current does the 1746-IC16 draw from the backplane?
It draws 85 mA from the 5V DC backplane and 0 mA from the 24V DC backplane, making it energy-efficient for a 16-channel module.
5. What wiring accessories are compatible with the 1746-IC16?
You can use 1746-HT or 1746-HCA terminal arms for easier field wiring connections to the 1746-IC16 module. The included Removable Terminal Block (RTB) simplifies installation as well.
