Description

The Schneider Electric ASB817116 (AS-B817-116) is a robust 16-channel digital input module designed for integration within the Modicon 800 Series I/O architecture. This module is specifically engineered to interface with 115 VAC discrete field signals, making it a reliable solution for monitoring status from motor starters, limit switches, and proximity sensors in industrial environments. By utilizing internal RC filtering and optical isolation, the module effectively manages high-voltage signals while protecting the controller backplane from electrical transients and potential ground loops.

Features

• 16 discrete input channels for high-density signal monitoring.
• Nominal input voltage of 115 VAC, suitable for standard industrial control circuits.
• Integrated RC filtering to mitigate contact bounce and transient noise.
• Optical isolation providing 1500 VAC dielectric protection between field inputs and the controller bus.
• Designed for seamless mounting in standard Modicon 800 Series chassis slots.

Applications

This module is widely deployed in demanding industrial sectors, including power utility generation, chemical processing, oil and gas refining, and heavy-duty mining. Its ability to handle line-voltage signals directly allows for simplified circuit design in applications where monitoring safety interlocks and motor control center (MCC) states is critical.

Technical Specifications

Installation Guidelines

• Ensure power is removed from the chassis backplane before inserting or removing the module to prevent electrical damage.
• Verify that the field wiring is properly shielded and routed away from high-power AC lines to minimize electromagnetic interference (EMI).
• Ensure the module is fully seated in the chassis slot and that the locking mechanism is engaged to maintain a secure electrical connection.
• Follow standard ESD handling practices when touching the module circuitry to prevent static discharge damage.
• Verify that the field supply voltage remains within the specified 85-130 VAC range to ensure reliable switching logic.

FAQ

What is the primary function of the ASB817116?
This module serves as a digital input interface that converts 115 VAC field signals into logic levels compatible with the Modicon 800 Series controller backplane.

Does this module require external power?
The module draws its internal logic power (250 mA at 5 VDC) directly from the chassis backplane, while the inputs are powered by the 115 VAC field signal source.

How are the channels isolated?
The module uses optical isolators for each channel, providing a 1500 VAC barrier that protects the internal controller logic from field-side voltage spikes.