The Allen-Bradley 1746-IV16 is a high-density discrete input module for the SLC 500 programmable controller family. This module provides a reliable interface between field devices and the processor. It converts incoming DC signals into logic levels that the CPU can understand. Additionally, the 1746-IV16 supports a sourcing wiring configuration and operates across a wide voltage range. Therefore, it serves as a fundamental building block for many industrial control systems.
The 1746-IV16 module integrates sixteen (16) input channels into a single group. Each channel accepts a nominal input voltage of 24VDC. Moreover, the module operates reliably across a broad range of 10 to 30VDC, ensuring compatibility with many power sources.
Each channel draws a nominal input current of 8 mA at 24VDC. The module also features a maximum off-state voltage of 5VDC and a maximum off-state current of 1.0 mA. This design effectively prevents false triggers from stray voltages. Furthermore, the signal delay time reaches a maximum of 8 milliseconds for both On and Off transitions, guaranteeing timely data updates for your control programs.
The Allen-Bradley 1746-IV16 draws 0.085 A (85 mA) at 5 Volts DC from the backplane. Additionally, the module dissipates up to 3.6 Watts of power. This value plays a key role in system thermal planning.
Installing the 1746-IV16 module requires only a few minutes. First, power down the chassis completely. Next, align the module with the card guides inside the chassis. Then, slide the unit firmly into the slot until the backplane connector seats properly. Finally, secure the module by tightening the top and bottom retaining screws. The module occupies a single slot in any 1746 chassis.
The 1746-IV16 employs a source wiring configuration. In this arrangement, the module supplies voltage to the input circuit. This feature proves especially useful for connecting dry contact switches or devices without internal power sources. For instance, you can wire a simple limit switch between the external power supply and the module input. Additionally, the module includes a removable terminal block (RTB). This RTB allows you to perform all wiring outside the chassis. After wiring, you simply attach the RTB to the front of the module. Consequently, module replacement becomes quick and hassle-free.
The 1746-IV16 features sixteen (16) LED status indicators on its front panel. Each LED corresponds to a specific input channel and lights up when that channel activates. This visual feedback enables operators to diagnose issues rapidly. For example, you can verify sensor operation without connecting a programming terminal.
The Allen-Bradley 1746-IV16 operates dependably in demanding industrial conditions. It supports an ambient temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit). Furthermore, the module tolerates relative humidity from 5 to 95% noncondensing. The SLC 500 platform, including this module, withstands vibration and shock commonly found in factory environments.
Allen-Bradley 1746-IV16 Discrete Input Module (1 unit)
Removable Terminal Block (RTB) (Pre-installed)
User Manual (Quick Start Guide)
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1. What is the difference between a sourcing and sinking input module?
A sourcing module like the 1746-IV16 provides voltage to the connected device. Conversely, a sinking module receives voltage from the device. The 1746-IV16 works with devices that complete a path to ground.
2. Can the Allen-Bradley 1746-IV16 handle a 120VAC signal?
No, you cannot use this module with AC signals. The 1746-IV16 accepts only DC inputs from 10 to 30VDC. Applying 120VAC will permanently damage the module. For AC applications, consider a module such as the 1746-IA16.
3. Can I replace the 1746-IV16 while the system is running?
We strongly advise against hot-swapping. Always power down the entire SLC 500 chassis before installing or removing the 1746-IV16. This practice prevents electrical damage and ensures operator safety.
4. What types of field devices work with the 1746-IV16?
The 1746-IV16 connects to a wide range of DC-powered devices. Common examples include proximity sensors, photoelectric sensors, limit switches, pushbuttons, and selector switches. Ensure that your device's output matches the module's sourcing configuration.
5. How can I verify that the 1746-IV16 module functions correctly?
You have two effective methods. First, observe the LED indicators on the front panel. Second, monitor the corresponding input bits in the processor's data table using your ladder logic program.
| Brand Name | |
| Model No. | 1746-IV16 |
| Product Type | Discrete Input Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
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