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 discrete signals, providing reliable sensing for industrial applications such as power generation, petrochemical refining, and heavy-duty manufacturing. By incorporating robust RC filtering, the module effectively mitigates electrical noise, contact bounce, and transient voltage spikes, ensuring consistent and stable data acquisition for the controller.
Hardware Interface Architecture
The ASB817116 utilizes a sophisticated isolation design to protect the controller backplane from high-voltage field-side transients. Each input path is equipped with optical isolation, creating a physical barrier that prevents ground potential shifts or inductive kickback from impacting internal logic circuitry. The module is designed for direct insertion into standard 800 Series chassis slots, utilizing the parallel data bus for efficient communication of real-time channel status.
Technical Specifications
Model
ASB817116
Channels
16 Discrete Inputs
Input Voltage
115 VAC Nominal (85-130 VAC Range)
Frequency
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-side voltage matches the 115 VAC rating of the module to avoid hardware failure or safety hazards.
Use shielded cabling for field inputs to minimize EMI interference in high-noise environments.
Ensure proper grounding of the 800 Series chassis to maintain the integrity of the isolation barrier.
Avoid routing high-voltage field lines alongside sensitive low-voltage communication or signal cables.
FAQ
What is the primary function of the ASB817116 module?
This module is a 16-channel digital input card used to sense 115 VAC signals from field devices like limit switches, proximity sensors, and motor starters within a Modicon 800 Series system.
Does this module provide isolation?
Yes, the ASB817116 features optical isolation between the field inputs and the controller backplane, providing 1500 VAC dielectric protection to safeguard the internal system logic.
What are the input voltage requirements?
The module is rated for 115 VAC nominal, with an operating range of 85 to 130 VAC. It triggers an ON-state at 85 VAC and an OFF-state at 40 VAC.
