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Product Overview
The Schneider Electric ASB817116 is a 16-channel digital input module designed for the Modicon 800 Series I/O platform. This module is specifically engineered to interface with 115 VAC field signals, providing reliable discrete sensing for industrial automation environments such as power utilities, petrochemical processing, and heavy manufacturing. By utilizing robust signal conditioning, the module ensures that high-voltage inputs from field devices—such as limit switches, pushbuttons, and auxiliary contacts—are accurately captured while filtering out electrical noise and transient spikes.
Features
- 16 discrete input channels with high-voltage 115 VAC capacity.
- Integrated optical isolation for superior protection between field wiring and internal backplane circuitry.
- Passive RC filtering to mitigate contact bounce and high-frequency interference.
- Designed for seamless integration into standard Modicon 800 Series chassis configurations.
- Robust construction to withstand demanding industrial temperature and humidity conditions.
Applications
This module is ideal for monitoring status signals in AC-powered control systems. Typical applications include monitoring motor control center (MCC) status, tracking safety switch states, and detecting proximity sensor triggers within distributed I/O architectures.
Technical Specifications
| Model | ASB817116 |
| Channels | 16 |
| Input Voltage (Nominal) | 115 VAC |
| Input Voltage Range | 85 to 130 VAC |
| Frequency Range | 47 to 63 Hz |
| ON-State Threshold | 85 VAC minimum |
| OFF-State Threshold | 40 VAC maximum |
| Input Impedance | 12 kOhm at 60 Hz |
| Isolation | 1500 VAC (channel-to-bus) |
| Backplane Current | 250 mA at 5 VDC |
| Operating Temperature | 0 to 60 deg C |
| Storage Temperature | -40 to 85 deg C |
| Humidity | 5 to 95% non-condensing |
Installation Guidelines
- Ensure the chassis backplane power is disconnected before installing or removing the module to prevent electrical damage.
- Verify that the field wiring is correctly terminated according to the local electrical code and the Modicon 800 Series wiring diagrams.
- Use shielded cabling for long-distance field runs to maintain signal integrity and reduce EMI susceptibility.
- Maintain proper module seating in the rack to ensure reliable connection to the parallel data bus.
- Ensure adequate ventilation in the cabinet to maintain the specified operating temperature range.
FAQ
What is the primary function of the ASB817116 module?
This module acts as a bridge between 115 VAC field devices and the PLC, converting high-voltage status signals into digital logic levels for the controller.
Does this module require external power for the inputs?
The module is designed to monitor 115 VAC field signals; however, it draws its internal logic power from the 5 VDC backplane rail of the 800 Series chassis.
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