FBM09 digital input module

The FBM09 is a digital input module developed by Foxboro for its I/A Series Distributed Control System (DCS). It is specialized in collecting and transmitting on-site digital switching signals, serving as a key front-end component for real-time monitoring of device status in industrial automation scenarios. Below is its detailed information:

1. Core Functions

Digital Signal Acquisition: Primarily collects dry contact signals or low-voltage DC digital signals from on-site devices (such as emergency stop buttons, limit switches, and status indicators) to reflect the "on/off" or "normal/fault" status of equipment.
Signal Conditioning & Transmission: Filters and isolates the acquired digital signals to eliminate interference from industrial environments. It then converts the signals into a format recognizable by the I/A Series DCS and transmits them to the upper-level control system for logic judgment and interlock control.
Fault Monitoring: Integrates basic self-diagnostic functions to monitor the module’s power supply status and channel circuit integrity. If abnormalities (such as open input lines) occur, it sends fault prompts to the DCS to facilitate timely troubleshooting.

2. Technical Specifications

Category	Specific Parameters
Number of Input Channels	16 independent digital input channels (supports simultaneous signal collection).
Supported Signal Types	- Dry contact signals (normally open/NO or normally closed/NC)- Low-voltage DC signals (typically 24VDC, with an effective threshold of 18–30VDC for "on" and 0–5VDC for "off")
Input Response Time	≤1ms (ensures rapid capture of transient switching signals, such as emergency stop triggers).
Isolation Performance	- Channel-to-channel isolation: ≥1000V AC (1 minute)- Module-to-system backplane isolation: ≥2500V AC (1 minute)
Power Supply	24VDC ±10% (typical power consumption: ≤3W)
Operating Temperature	-40°C to 70°C (suitable for harsh industrial environments like petrochemical plants and power stations)
Storage Temperature	-40°C to 85°C