ABB INNIS21 network interface module

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ABB INNIS21 Network Interface Module

Product Description

Key Specs

• Compatible Devices: ABB INNPM11/INNPM21 protection relays; supports connection to INNPM series relay communication ports (via dedicated 10-pin terminal block).
• Supported Protocols:
  • Primary: Modbus RTU (RS485) — for integration with PLCs, SCADA systems, or HMI (e.g., ABB PanelView).
  • Optional: BACnet MS/TP (via firmware upgrade) — for building automation systems (BAS).
• Communication Parameters:
  • Baud rate: 9600/19200/38400/57600/115200 bps (configurable via DIP switches).
  • Parity: None/Even/Odd (selectable); Data bits: 8; Stop bits: 1.
  • Address range: 1-247 (Modbus RTU slave address, set via DIP switches).
• Power Supply: Takes 24V DC from relay’s auxiliary power port (18-30V DC); power consumption ≤2W (no external power required).
• Mechanical & Environmental:
  • Dimensions (W×H×D): 45mm×90mm×60mm (compact, fits relay-mounted enclosures); weight ~100g.
  • Protection degree: IP20 (mounted inside relay cabinets or control panels).
  • Operating temperature: -10°C~+55°C, 5%-95% RH (non-condensing, resistant to industrial humidity).
• Mounting: Directly attached to INNPM series relays via dedicated mounting clips (tool-free installation); optional 35mm DIN rail mounting (with adapter bracket).

Core Functions

1. Data Transmission:
   • Sends real-time relay data to upper-level systems: measured values (current, voltage, power factor), protection status (overcurrent trip, earth fault alarm), and operational status (relay ON/OFF).
   • Receives remote commands: relay reset, parameter modification (e.g., overcurrent trip setting), and remote enable/disable.
2. Protocol Conversion:
   • Converts relay-specific digital signals to Modbus RTU/BACnet MS/TP protocol frames, enabling compatibility with diverse industrial/building automation networks.
3. Fault Logging & Upload:
   • Stores up to 50 recent fault events (with timestamps, fault type, and trigger values) locally; uploads fault logs to SCADA via network for troubleshooting and compliance reporting.
4. Status Indication:
   • Built-in LED indicators: Power (green, ON when powered), Communication (yellow, flashes during data transmission), Fault (red, ON for communication errors or module faults).

Core Advantages

1. Relay-Specific Compatibility: Tailored for INNPM series relays — plug-and-play integration with no additional wiring, eliminating protocol mismatches.
2. Dual-Protocol Flexibility: Supports Modbus RTU (industrial standard) and optional BACnet (building automation standard), adapting to both industrial and commercial applications.
3. Easy Configuration: DIP switches for quick setting of Modbus address/baud rate — no software required for basic setup, reducing commissioning time.
4. Space-Saving Design: Compact size and relay-mounted installation save cabinet space, ideal for dense low-voltage distribution panels (e.g., building electrical rooms).

Applications

1. Building Power Distribution: Integrates INNPM11 relays (protecting 3-phase distribution circuits) with building management systems (BMS) via BACnet — enables centralized monitoring of floor-level power consumption and remote reset of tripped relays.
2. Industrial Low-Voltage Grids: Connects INNPM21 relays (protecting motor feeders) to factory PLCs via Modbus RTU — transmits overcurrent alarm signals to PLCs, triggering production line shutdowns to prevent equipment damage.
3. Infrastructure Power Control: Used in airport or railway station power distribution systems — links INNPM relays (protecting lighting and HVAC circuits) to SCADA, allowing remote status checks and parameter adjustments without on-site visits.
4. Data Center Power Protection: Interfaces INNPM relays (protecting server rack power feeds) with data center infrastructure management (DCIM) systems — monitors real-time current draw and uploads fault logs for predictive maintenance.

Precautions

1. Relay Compatibility: Confirm relay model is INNPM11/INNPM21 — incompatible with other ABB relay series (e.g., REF615), leading to communication failures.
2. Wiring: Use shielded twisted-pair cables (0.5-1mm²) for RS485 communication; ground the cable shield at one end to reduce EMI interference (critical near inverters or high-voltage cables).
3. Address & Baud Rate Matching: Ensure Modbus address and baud rate match upper-level systems (e.g., PLC/SCADA) — mismatched settings cause data loss or communication timeouts.
4. Firmware Upgrade: For BACnet functionality, upgrade module firmware via ABB’s INNIS Configuration Tool (v2.0+); use only ABB-approved firmware to avoid module malfunctions.
5. Environmental Protection: Avoid mounting in dusty or oily areas (IP20 not dustproof); clean the module surface periodically with a dry cloth to prevent dust accumulation on connectors.
6. Load Limit: Do not connect more than 32 modules to a single Modbus RTU bus (due to RS485 bus load limitations); use a repeater for longer networks (over 100m) to maintain signal integrity

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