Description
| Parameter | Specification |
| Product Model | Foxboro AD908AE |
| Module Type | Discrete Input Interface (FBM242) |
| Channel Count | 16-Channel Isolated Inputs |
| Input Voltage | 120 V AC / 125 V DC (Nominal) |
| Isolation | Channel-to-Channel & Channel-to-Ground |
| Communication | Fieldbus Cluster Bus Interface |
| Response Time | < 20 ms (Typical) |
| Operating Temp | -20 to +70°C |
| Mounting | Baseplate / DIN Rail |
The Foxboro AD908AE (associated with the FBM242 series) is a high-density discrete input module designed for the I/A Series distributed control system. This module provides 16 isolated channels, allowing for the direct monitoring of status signals from field devices such as limit switches, motor starters, and pushbuttons operating at high voltage levels. Its robust electrical isolation protects the control system from field-side surges and noise, ensuring high signal integrity for critical interlocking and status-monitoring logic. The AD908AE is engineered for long-term reliability in demanding industrial environments, featuring plug-and-play integration with Foxboro baseplates for rapid deployment and maintenance.

FOXBORO AD908AE

FOXBORO AD908AE
Model Comparisons
The AD908AE is primarily distinguished from the AD908AC by its voltage handling and isolation characteristics. While the AC variant often handles lower-voltage DC signals (such as 24V), the AE model is specifically rated for 120V AC / 125V DC applications, making it suitable for utility and heavy power infrastructure. Furthermore, compared to the FBM201 (Analog Input), the AD908AE is a purely digital (On/Off) interface, lacking the A/D conversion circuitry found in analog modules. Unlike newer FCP270-linked modules, the AD908AE maintains the classic I/A Series form factor, providing a cost-effective path for maintaining legacy system status-monitoring without requiring a full control-processor overhaul.
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