ABB 07 DC 91 Digital Input Output Module | CS31 I/O Controller

Overview

The ABB 07 DC 91 is a digital input/output module designed for precise control and monitoring within distributed automation systems. This unit offers a combination of fixed and configurable channels, supporting efficient signal processing and communication in both process and machine control environments. Its robust electrical design, diagnostic indicators, and wide operating range ensure dependable performance in demanding industrial applications.

Technical Specifications

General Information

• Model Number: 07 DC 91

• Manufacturer: ABB

• Product Type: Digital Input/Output Module

• Rated Supply Voltage: 24 V DC

• Rated Signal Voltage: 24 V DC

• Maximum Current Consumption (No Load): 0.15 A

• Maximum Load Current at Supply Terminals: 4.0 A

• Power Dissipation:

• Without load: 5 W

• Under load: 10 W

• Protection: Reverse polarity protection included

• Mounting: DIN rail, per DIN EN 50022-35 standard

• Dimensions (W x H x D): 120 × 140 × 85 mm

• Weight: 0.45 kg

Digital Inputs

• Number of Channels: 16

• Input Delay: Approx. 7 ms

• Input Voltage: 24 V DC

• Typical Input Current per Channel:

• +24 V: 7.0 mA

• +13 V: >2.0 mA

• +5 V: >1.0 mA

• +30 V: <9.0 mA

• Channel Indication: Green LED per input

Digital Outputs

• Number of Channels: 8 (transistor type)

• Nominal Output Current: 500 mA at 24 V DC

• Maximum Total Output Current: 4 A (per group)

• Leakage Current (Off-State): <0.5 mA

• Channel Indication: Yellow LED per output

Configurable I/O Channels

• Number of Configurable Channels: 8

• Signal Voltage: 24 V DC

• Input Characteristics: Same as standard input channels

Environmental Conditions

• Operating Temperature: 0°C to +55°C

• Storage Temperature: −25°C to +75°C

• Protection Class: IP20 (suitable for control cabinet use)

Key Features

• 32 total channels including configurable I/O options

• High-speed transistor outputs for responsive switching

• LED indication for each input and output channel

• Integrated diagnostics for operational and fault monitoring

• CS31 system bus interface for seamless ABB network integration

• Compact DIN-rail mountable housing for easy installation

Application Scenarios

The 07DC91 module is ideally suited for:

• Machine control systems requiring mixed input and output configurations

• Process automation setups with distributed I/O needs

• Integration with ABB Advant Controller 31 and AC31 control systems

• High-reliability digital control tasks in factory automation environments

FAQ

Q: How many digital channels does the 07DC91 provide?
A: It provides 16 digital inputs, 8 transistor outputs, and 8 configurable input/output channels.

Q: What type of diagnostic indication is included?
A: The module includes 33 LEDs—green for inputs, yellow for outputs, and additional indicators for system status and errors.

Q: Can it handle both sourcing and sinking signals?
A: Yes. Each digital channel can be configured for typical 24 V DC logic levels compatible with ABB system standards.

Q: How is it mounted?
A: The module mounts directly onto a DIN rail (EN 50022-35), simplifying installation and maintenance.