Product Summary
The 1746-IA16 is a critical SLC 500 component for industrial automation. This module provides sixteen discrete AC input channels. It accepts a standard voltage range from 85 to 132 Volts AC. Engineers use this module to monitor real-world device states. It translates those signals for the PLC processor to execute logic. This specific model occupies just one single slot in the chassis.
Theme Option A: Product Procurement & Buyer Guide
Why Choose the 1746-IA16 for Your System?
Procurement managers need a reliable AC input solution for legacy systems. The 1746-IA16 fits perfectly into an existing SLC 500 chassis. It offers a straightforward upgrade path without major rewiring. This module uses a removable terminal block for quick swaps. You can replace the module without disconnecting field wiring. This feature drastically reduces downtime during maintenance events.
Voltage Compatibility and System Planning
This module operates on a standard 100-120VAC industrial power category. You must ensure your input signals fall within the 85-132V AC range. For 200/240VAC applications, you need the specific counterpart model. That alternative part number is the 1746-OM16. The 1746-IA16 has no internal protection circuitry for surges. Any external device connected must match the SLC 500 inrush current specs.
Key Technical Specifications for Engineers
The module draws only 85 milliamps from the 5V DC backplane. It consumes zero current from the 24V DC supply. Each of the 16 input points uses about 0.27 watts. The total power dissipation for the whole module is 4.8 Watts. The nominal input current at 120V AC is just 12 milliamps. This low power draw makes it efficient for dense chassis configurations.
Signal Timing and Response Characteristics
The module has a maximum ON-delay signal time of 35 milliseconds. The OFF-delay signal has a maximum time of 45 milliseconds. The step response is 100 milliseconds for input and 2.5 milliseconds for output. You must account for these delays in your logic program. The maximum OFF-state voltage is 50V AC. The OFF-state current is only 2 milliamps to prevent false readings.
Installation Flexibility and Chassis Options
You can install this module in a fixed or modular hardware controller. It works locally in the main rack or in an expansion rack. There is no limit on the number of modules you can install. The only constraint is the number of available slots in your chassis. The module weighs just 0.34 kg for easy handling. Its dimensions are 5 x 2 x 6 inches for a compact footprint.
Theme Option B: Step-by-Step User & Installation Guide
Step 1: Pre-Installation Safety Check
Always disconnect all power sources before installing the module. Verify that your input voltage matches the specified range. The operating frequency must be between 47 and 63 Hz. Ensure your field devices are compatible with the input circuit. The inrush current can reach a maximum of 0.8 mA. The time duration for this inrush current is up to 500 microseconds.
Step 2: Mechanical Mounting into the Chassis
Select an available slot in your SLC 500 chassis. Align the module with the chassis guide rails carefully. Slide the 1746-IA16 firmly into the slot until it seats. Secure the module using the top and bottom retention screws. Tighten the screws to ensure a solid backplane connection. This prevents intermittent communication errors during operation.
Step 3: Wiring the Removable Terminal Block
The module has a total of 20 terminals for connection. Terminals 18 and 19 serve as internally connected commons. Use the specified I/O connection cables for wiring. The recommended cables are the 1746-HT and 1746-HCA models. Connect your AC input devices to the appropriate input terminals. The removable design allows you to pre-wire the block offline.
Step 4: Configuring Module Parameters
You can adjust the module’s parameters to fine-tune its operation. Set the signal delay times to match your application needs. The ON delay is configurable up to 35 ms maximum. The OFF delay is configurable up to 45 ms maximum. These adjustments help filter out electrical noise from the input signals. Proper configuration ensures accurate state detection for the PLC.
Step 5: System Integration and Testing
Power up the system after all connections are secure. Perform a full input scan to verify each channel works. The PLC uses this scan as the primary phase for program execution. If the module does not detect input signals, the program has no reference. Check the status indicators on the module face for each channel. Verify that the PLC logic responds correctly to each input state.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1746-IA16 Digital AC Input Module
- One (1) Removable Terminal Block for wiring connections
- Standard anti-static packaging for safe shipping
- We offer express delivery shipping for urgent orders
- We ship via FedEx, UPS, and DHL for fast transit
