Product Summary
The 1794-IC16 is a 16-point, non-isolated sinking input module. It operates reliably within a 30 to 60V DC range. This unit integrates seamlessly into the Rockwell Automation Flex I/O platform. It manages up to 7.0mA per channel at its max voltage. This module delivers precise signal acquisition for critical field devices.
Theme A: Product Procurement & Buyer Guide
Verifying Electrical Compatibility for Your Application
This module accepts a sinking input of 48 Volts DC. The 1794-IC16 requires a power supply that matches its on-state voltage. You must keep the voltage between 30V DC and 60V DC. The module draws a minimal 25mA from the FlexBus at 5V DC. This low current draw simplifies overall system power budgeting.
Analyzing On-State and Off-State Characteristics
Input signals must reach a minimum of 30V DC to register as on. The module recognizes an on-state current as low as 2.0mA. It handles a maximum on-state current of 7.0mA @ 60V DC. For off-state signals, the voltage must drop below 10V DC. The off-state current must remain under 1.5mA for proper noise immunity.
Selecting the Correct Terminal Base
You must install this module onto a compatible terminal base unit. The 1794-IC16 works with the 1794-TB3S or 1794-TB3SK blocks. These bases provide the physical connection for field wiring. They also help manage the module’s power dissipation requirements. This pairing ensures a secure and stable electrical interface.
Understanding Power and Thermal Management
The maximum power dissipation for this unit is 6.4 Watts. This translates to a heat output of roughly 22 BTU per hour. Your control cabinet must handle this thermal load effectively. Proper ventilation ensures the module stays within its T3 temperature code. Always use a surge protector to guard against power imbalances.
Enhancing System Capacity and Isolation
The 16 inputs expand the capacity of your existing Flex I/O setup. The unit supports running more processes simultaneously without issues. It withstands 1900 Volts DC of isolation voltage. This high isolation protects sensitive controller electronics from surges. You can also configure the input filter time for your specific process needs.
Theme B: Step-by-Step User & Installation Guide
Preparing for Mechanical Installation
The module has a compact footprint of 46 x 94 x 53 millimeters. This small size makes it easy to transport and install. The unit supports both screw mounting and DIN rail mounting options. For DIN rail, hook the base over the top rail first. Then push the base down until it locks securely into place.
Wiring Inputs to the Terminal Block
Connect individual inputs to their assigned terminal numbers exactly. Use the 1794-TB3 terminal base with its screw clamp connections. The top strip holds the I/O terminals for your field devices. The middle strip provides the voltage common connection. The bottom strip supplies the positive voltage to the module.
Configuring the Module on the Network
Use the appropriate communication media for the remote interface. The module connects to the FlexBus backplane via the adapter. It draws its communication power directly from this backplane. The 16 logic-driven LEDs show the status of each input. This visual feedback helps you verify wiring during commissioning.
Finalizing the Setup and Safety Checks
Ensure the module is compatible with an open-style enclosure. Check that all wire gauges meet the specified requirements. The system uses a 2-key switch position for proper identification. Always install a surge protector on the power lines. This step prevents damage from sudden voltage spikes in the field.
