PLCs, Power Supplies & Others

Technical Specifications Overview

Functional Overview and Network Connectivity

This interface module connects ABB control systems to MODBUS RTU networks as a slave device. It enables data exchange between ABB controllers and third-party automation equipment. The INNIS11 operates as a reliable communication bridge for distributed I/O architectures. Furthermore, the module supports both standard MODBUS and ABB-specific protocols for flexibility. This dual capability simplifies integration with existing ABB installations. The module also includes a dedicated service port for local configuration and diagnostics.

Communication Protocols and Data Exchange

The ABB INNIS11 implements the MODBUS RTU protocol for universal connectivity. It operates exclusively in slave mode, responding to master device requests. The module also supports the ABB proprietary INN protocol for seamless system integration. Additionally, the unit handles function codes for reading and writing discrete I/O, analog values, and registers. You can configure the baud rate across a wide range from 2400 to 115.2 kbps. This flexibility matches various network speeds and device capabilities. The module also supports parity, data bits, and stop bits configurations.

Physical Architecture and Mounting Specifications

The module features a robust design with dimensions of 45 mm x 130 mm x 105 mm (1.8″ x 5.1″ x 4.1″) . Its weight of approximately 0.25 kg ensures easy handling during installation. The front panel provides a removable 9-pin terminal block for RS-485 field wiring. This terminal accepts wire sizes from 0.5 to 1.5 mm². The service port uses a 3-pin Phoenix connector for RS-232 connectivity. The module mounts onto standard DIN rails using an integrated latch mechanism. The rear housing provides ample clearance for heat dissipation.

Electrical Interface and Transmission Characteristics

The RS-485 port supports multi-drop networks with up to 31 additional devices. This allows a single master to communicate with multiple slaves simultaneously. The maximum cable length extends to 1200 meters at lower data rates. The module includes software-selectable termination resistors for network integrity. These resistors prevent signal reflections on long cable runs. The RS-232 service port provides a direct connection for commissioning and troubleshooting. This port uses standard serial settings with hardware handshaking support. The module also features transient protection on both communication ports.

Status Indication and Diagnostic Features

The module incorporates four front-panel LEDs for comprehensive status monitoring. A green Power LED indicates correct supply voltage. A Run LED shows the module’s operational state. The Error LED alerts users to communication faults or configuration issues. An additional LED indicates TX/RX activity on the RS-485 port. The service port also provides detailed diagnostic information through terminal software. Additionally, the module logs communication errors and timeouts internally. You can retrieve these logs through the service interface.

Power Requirements and Energy Storage

The module draws 80 mA from a 24 VDC external power supply. This modest current consumption suits power-constrained installations. The internal 220 µF capacitor provides energy storage for brief interruptions. This capacitance ensures the module maintains operation during momentary voltage dips. The module also includes reverse-polarity protection on the power input terminals. This safeguard prevents damage from accidental wiring reversal.

Environmental Conditions and Certifications

The module operates in temperatures from 0°C to +60°C. Storage temperatures range from -40°C to +85°C. The unit meets CE, UL, and CSA standards for global deployment. The module carries an IP20 protection rating for indoor panel installation. Install the module in a clean, dry environment free from corrosive gases. The unit also complies with IEC 61131-2 for programmable controller equipment.

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