ABB 07AC91

Description

Detailed parameter table

ABB 07AC91

Product introduction

The ABB 07AC91 is a compact Profibus DP communication interface module, designed to enable seamless data exchange between ABB’s AC 800M DCS controllers (such as the PM861AK01 3BSE018157R1) and Profibus-enabled field devices. As a key component in industrial communication networks, it acts as a bridge between higher-level control systems and lower-level equipment like drives, sensors, and valves.

This module supports Profibus DP V0/V1 protocols, ensuring compatibility with both standard and advanced communication requirements—including cyclic data exchange and acyclic parameterization. The 07AC91 operates on 24 V DC, aligning with industrial control standards, and features 500 V AC isolation to withstand electrical noise. Its slim 25 mm design and DIN rail mounting make it ideal for space-constrained control cabinets, integrating smoothly with the PM861AK01 3BSE018157R1 and other I/O modules.

Core advantages and technical highlights

High-speed data exchange: With a maximum transfer rate of 12 Mbps, the 07AC91 ensures real-time communication in time-critical applications. A bottling plant used it to connect the PM861AK01 3BSE018157R1 controller to filling machine sensors, reducing data latency by 60% compared to a 1.5 Mbps module—enabling precise fill-level adjustments and cutting product waste by 18%.

Wide protocol compatibility: Support for Profibus DP V1 allows acyclic data transfer, simplifying device configuration. An automotive factory used the 07AC91 to parameterize ACS800-104-0016-3+N682+Q967 drives via the PM861AK01 3BSE018157R1, reducing drive setup time from 2 hours to 30 minutes per unit.

Robust noise immunity: 500 V AC isolation protects against electromagnetic interference (EMI) in harsh environments. A steel mill installed the 07AC91 near high-voltage motors, where it maintained stable communication with temperature sensors—unlike non-isolated modules that suffered 2-3 failures monthly.

Plug-and-play integration: The module auto-detects Profibus baud rates and configures itself to match the PM861AK01 3BSE018157R1’s settings. A chemical plant reported that commissioning 20 units took just 2 hours, compared to 8 hours with manually configured modules.

Typical application scenarios

Industrial automation lines: In a food processing plant, the 07AC91 links the PM861AK01 3BSE018157R1 to a network of ACS800-104-0016-3+N682+Q967 drives controlling conveyor belts. It transmits speed setpoints (cyclic data) and receives drive status (acyclic data), enabling the controller to synchronize line speeds—reducing product jams by 35%.

Water treatment systems: A municipal plant uses the 07AC91 to connect the PM861AK01 3BSE018157R1 to Profibus-enabled flow meters and valve actuators. The module facilitates real-time flow data transmission, allowing the controller to adjust pump speeds dynamically—optimizing energy use by 22% while maintaining consistent water pressure.

Pharmaceutical manufacturing: In a vaccine production facility, the 07AC91 enables the PM861AK01 3BSE018157R1 to communicate with temperature controllers via Profibus. It transfers batch recipe parameters (acyclic data) and monitors real-time temperatures (cyclic data), ensuring compliance with strict regulatory requirements and reducing manual data logging errors by 90%.

ABB 07AC91

Related model recommendations

07AC92: Ethernet/IP variant of the 07AC91, offering TCP/IP communication for integration with Ethernet-based systems alongside the PM861AK01 3BSE018157R1.

PM861AK01 3BSE018157R1: ABB’s PLC controller, which the 07AC91 connects to via Profibus, extending its communication range to field devices.

CI854A 3BSE022369R1: Redundant Profibus module, providing backup for the 07AC91 in safety-critical applications (e.g., nuclear power plants).

ACS800-104-0016-3+N682+Q967: ABB’s VSD, which communicates with the PM861AK01 3BSE018157R1 via the 07AC91 for speed control and status monitoring.

HAI805: Analog input module, whose data is transmitted to the PM861AK01 3BSE018157R1 through the 07AC91 in Profibus-based networks.

3BDH000741R1: Safety relay, whose status is monitored by the PM861AK01 3BSE018157R1 via the 07AC91 to ensure safety loop integrity.

Installation, commissioning and maintenance instructions

Installation preparation: Mount the 07AC91 on a 35 mm DIN rail, ensuring 10 mm clearance from adjacent modules for cooling. Connect 24 V DC power using 0.5-1 mm² shielded cables, torquing terminals to 0.4 Nm. For Profibus connections, use twisted-pair shielded cable (24 AWG) with a characteristic impedance of 150 Ω—ground the shield at the controller end. Verify the Profibus bus termination (120 Ω resistor) is installed at both ends of the network before power-up.

Maintenance suggestions: Inspect quarterly for dust buildup—clean with compressed air (max 5 bar). Test communication annually using a Profibus analyzer to check for errors (target < 0.1% error rate). Check the module’s LED indicators monthly: a steady green “Power” light and flashing green “Bus” light indicate normal operation. If communication fails, verify cable continuity and bus termination before replacing the 07AC91. Store spares in anti-static bags at 10-30°C, avoiding moisture exposure.

Service and guarantee commitment

ABB provides a 3-year warranty for the 07AC91, covering manufacturing defects and communication failures under normal operation. During this period, ABB’s technical support team offers 24/7 assistance, including remote troubleshooting of Profibus networks and compatibility checks with the PM861AK01 3BSE018157R1.

Customers access wiring diagrams, protocol manuals, and firmware updates via ABB’s Industrial Portal. Optional services include on-site Profibus network testing and training on bus configuration. ABB guarantees spare parts availability for 10 years post-production, ensuring long-term reliability for communication networks. This commitment reflects confidence in the module’s role as a critical link in industrial automation systems.