The Allen-Bradley 1794-IC16 Flex I/O digital module provides sixteen nonisolated sinking inputs. This unit directly expands your system’s capacity for monitoring discrete signals. Engineers use it to reliably detect switch or sensor states. The module supports a wide DC voltage range for flexible integration.
Product Procurement & Buyer Guide
The 1794-IC16 operates with an on-state voltage between 30V DC and 60V DC. This range suits many industrial 48V DC control systems. The module draws only 25mA from the 5V DC FlexBus. Its maximum power dissipation is just 6.4W at 60V DC.
This module requires a compatible terminal base unit for operation. The 1794-IC16 works with the Allen-Bradley 1794-TB3 or 1794-TB3S terminal bases. These bases provide the physical connection points for field wiring. You must select the correct base for your installation environment.
The module’s nominal input impedance is 11 kΩ. This impedance ensures proper signal detection from most standard sensors. The off-state voltage must remain below 10V DC for reliable logic recognition. This specification prevents false triggering from leakage currents.
The unit weighs only 0.13 lbs (0.06 kg) and has compact dimensions. Its size is 46 x 94 x 53 millimeters. This small footprint allows for dense panel layouts. The module supports both screw mounting and DIN rail mounting.
You must use a surge protector to guard against power imbalances. This practice enhances the module’s longevity in harsh electrical environments. The 1794-IC16 can withstand 1900V DC of isolation voltage. This high isolation protects the backplane from voltage transients.
Step-by-Step Installation & Wiring Guide
First, mount the 1794-TB3 terminal base onto the DIN rail. Hook the base over the top of the rail. Push the base down until it locks securely into place. Ensure the FlexBus connector engages with the adjacent adapter.
Second, position the 1794-IC16 module onto the mounted terminal base. Align the module’s key switch with the base’s keying mechanism. Press the module firmly until it seats completely. The T3 temperature code indicates the module’s operating environment.
Third, connect your field wiring to the terminal base strips. Use a screwdriver to tighten the screw clamp terminals. Apply a torque between 0.56 and 0.79 Nm for secure connections. Match each input wire to its assigned terminal number.
Fourth, connect the power supply to the designated common and voltage terminals. The -V common is located at terminals B-16 and B-33. The +V supply connects to terminals C-34 and C-51. You can daisy-chain power to adjacent terminal bases.
Fifth, configure the input filter time to match your process requirements. This adjustment helps filter out electrical noise. The module provides 16 logic-driven status indicators for troubleshooting. These LEDs show the real-time state of each input channel.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1794-IC16 Flex I/O digital input module
- The module ships in an anti-static protective bag
- Product packaging includes a label with the part number and UPC
- Express shipping is available via FedEx, UPS, and DHL
