ABB SPNPM22 Profibus DP Dual Redundant Fieldbus Communication Module for AC 800M Controller

Product Description

SPNPM22 is a high-performance Profibus DP bus communication expansion module under ABB SPNPM series, mainly matched with AC 800M (PM891/PEC985) controller and also compatible 

with Symphony Plus Harmony rack DCS system.

It acts as protocol bridge to realize bidirectional data conversion between the controller internal Peer bus and external Profibus DP fieldbus, connecting remote S800 I/O stations, frequency converters, 

intelligent instruments, soft starters and third-party DP slave devices. It supports A/B dual-channel bus redundant hot backup, DP-V1 acyclic data access and isochronous real-time communication, 

with full galvanic isolation between backplane and field bus, conformal coated PCB, online hot-swap without system shutdown. Widely used as replacement spare for power plant, petrochemical, 

pulp & paper, metallurgy large-scale DCS distributed control systems.

Technical Specifications

Model: SPNPM22, Brand: ABB, Origin: Switzerland

Compatible Controller: AC 800M PM891/PEC985, Symphony Plus rack

Bus Protocol: PROFIBUS DP-V0 / DP-V1, compliant with EN 50170 standard

Physical Interface: 2× isolated RS485 DB9 female connectors (Channel A/Channel B redundancy)

Baud Rate Range: 9.6kbps ~ 12Mbps auto-adaptive, minimum control cycle 1ms

Max Process Data: 244 bytes input + 244 bytes output per communication cycle

Electrical Isolation: 500VDC isolation between field bus and controller backplane

Power Supply: Powered by AC800M rack backplane 24VDC bus

Power Consumption: Max 5W

Hot Swap: Support online hot plug replacement during system operation

Diagnostic Function: Bus conflict detection, slave node status monitoring, communication error counting, front LED status indication

Operating Temperature: -20℃ ~ +60℃ full load continuous operation

Storage Temperature: -40℃ ~ +85℃

Humidity: 5%–95% non-condensing, anti-corrosion conformal coated circuit board

Protection Class: IP20 (only cabinet internal rack installation)

Mounting: Standard single-slot plug-in installation on the right expansion slot of AC800M CPU

Net Weight: Approx. 0.3kg

Certifications: CE, UL Class 1 Div 2, IEC 61131-2 industrial EMC compliance

Core Key Features

Dual-channel Profibus DP redundancy design: Two independent RS485 channels automatic master/standby switching, single bus cable failure will not cause communication interruption, 

greatly improving field bus system reliability.

DP-V1 extended function support: Realize non-cyclic parameter reading/writing of intelligent instruments and drives, convenient for remote device parameter debugging and fault diagnosis.

Isochronous MSAC_CYC synchronous mode, suitable for high-precision motion control, closed-loop speed regulation and other high real-time requirement control loops.

Large-capacity bidirectional data mapping area, flexible address offset and byte swap configuration, compatible with different brand DP slave equipment address definition differences.

Complete continuous self-diagnosis mechanism, real-time upload bus fault, slave offline and module abnormality to controller for alarm interlock processing.

Electrical isolation circuit effectively eliminates long-distance field cable ground loop interference and surge voltage impact, protecting the main controller backplane.

Standard pluggable rack structure, power-off one-to-one direct replacement, simple commissioning for old DCS system maintenance and renovation.

Mature industrial hardware, vibration-resistant and moisture-proof coating, stable 24/7 long-term uninterrupted operation in high-temperature, dusty central control room environments.