Description
Product Overview
The ABB 07DC91C is a distributed digital I/O module designed for the ABB Advant Controller 31 (AC31) and System 800xA with CS31 fieldbus. As a CS31 slave, it expands the controller’s I/O capacity in a distributed control system.
This module features a versatile mixed-signal configuration with 16 digital inputs and 8 configurable I/O points, suitable for interfacing with both sensors and actuators. It is built for standard DIN-rail mounting in control cabinets and is ideal for expanding I/O in process skids, machinery control panels, and plant floor equipment.
Parameter Values
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Product Model: ABB 07DC91C
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Brand: ABB
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Warranty: One Year
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Input Voltage: 24 V DC (nominal), 10–30 V DC (range)
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Output Voltage: 24 V DC
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Number of Input Channels: 16
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Number of Output Channels: 8 (24 V DC, transistor, 0.5 A max. per channel)
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Configurable I/O Channels: 8
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Communication Interface: CS31 bus (RS-485), 1 × slave port
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Supported Protocol: ABB CS31
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Operating Temperature: 0 to +55 °C
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Storage Temperature: -25 to +75 °C
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Protection Class: IP20 (front panel)
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Mounting: 35 mm DIN rail (TH35-7.5 / TH35-15) or panel screw mounting
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Dimensions (W × H × D): Approx. 120 mm × 140 mm × 85 mm
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Weight: Approx. 1.07 kg
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Maximum Altitude: 2000 m
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Overload Capacity: Short-circuit and overload protected per channel
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Response Time: Millisecond-level typical switching
Key Functions
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Distributed I/O Expansion: Serves as a remote I/O station on the CS31 bus, enabling scalable and cost-effective expansion of the AC31/800xA control system.
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Flexible Mixed I/O: Combines 16 digital inputs with 8 configurable channels, allowing adaptation to diverse field wiring schemes and mixed sensor/actuator applications.
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High-Density Channel Count: Provides a compact solution for acquiring numerous on/off signals and controlling multiple small loads from a single module.
Application Scenarios
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Process Control: Connecting on/off valves, motor starters, interlocks, and limit switches in industries like oil & gas, chemicals, and power.
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Manufacturing Automation: Used in conveyor control, robot I/O interfaces, and packaging machinery for sensor monitoring and actuator driving.
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Water & Wastewater Treatment: Suitable for pump start/stop control, valve positioning, and status monitoring of flow switches and level sensors.
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Building & Infrastructure: Applicable in HVAC systems, lighting control, and access control systems for reliable digital signal handling.
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Power Distribution: Integrates into substation control cabinets for status monitoring of breakers, isolators, and alarm points.
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