The ABB SPQRS22 SPNPM22 SPNIS21 SPIIT13 SPIIL02 L SPIET800 collection represents a comprehensive suite of high performance I/O, communication, and processing modules purpose built for ABB Symphony Plus and Bailey INFI 90 distributed control systems (DCS). As a global leader in industrial automation, ABB designs each of these modules to deliver exceptional reliability, precision signal conditioning, and seamless data exchange across the most demanding process environments. Together, these components support critical applications including power generation steam turbine control, oil and gas pipeline monitoring, chemical reactor sequencing, and water treatment plant automation.

The ABB SPQRS22 is a Quick Response Module combining four analog input channels and three digital input channels in a single compact unit. This hybrid module is engineered for high speed data acquisition where rapid detection of process changes is essential. The four analog inputs accept standard 4-20 mA or 0-10 V signals with 12 bit resolution, while the three digital inputs are optically isolated and rated at 24 V DC with configurable debounce filtering. The ABB SPQRS22 excels in fast loop control applications such as burner management and compressor anti surge where milliseconds matter.

The ABB SPNPM22 is a Network Processor Module serving as the intelligence gateway between field I/O and the higher level INFI NET control network. Based on a 32 bit processor, this module executes peer to peer communication, data concentration, and diagnostic reporting for up to 64 I/O modules in a single cabinet. The ABB SPNPM22 supports redundant configuration for fault tolerant applications and includes front panel LEDs for instantaneous status checking.

The ABB SPNIS21 is a high density analog input card providing 16 differential or 32 single ended channels for voltage or current measurement. Each channel includes programmable gain amplifiers and anti aliasing filters, delivering 16 bit resolution with 0.1 percent accuracy. The ABB SPNIS21 is widely deployed for temperature monitoring via thermocouples and RTDs, pressure transmitter reading, and flowmeter signal conditioning. Its autocalibration feature compensates for drift over temperature, maintaining precision without manual intervention.

The ABB SPIIT13 is a communication interface card that provides a direct connection to INFI NET, ABB’s proprietary high speed deterministic control network. Operating at up to 10 Mbps over coaxial or fiber optic media, the ABB SPIIT13 bridges I/O subsystems to multiple controller nodes. It supports up to 250 m segment lengths for copper and 2 km for fiber, enabling geographically distributed cabinets to share real time data.

For local interconnection between multiple INFI NET segments, the ABB SPIIL02 L (Infi Net to Infi Net Local Interface) enables extended system expansion. This module links separate INFI NET subnetworks without requiring a network router, preserving deterministic timing while expanding total node count. The ABB SPIIL02 L is particularly valuable in large power plants and refinery complexes where control cabinets are spread across hundreds of meters.

Finally, the ABB SPIET800 is a high speed Ethernet communication module that bridges INFI NET to standard TCP IP networks. This module supports Modbus TCP, OPC, and ABB’s proprietary S+ Engineering protocols, allowing Symphony Plus DCS to exchange data with third party PLCs, historians, and enterprise resource planning systems. The ABB SPIET800 includes a built in web server for remote diagnostics and supports redundant Ethernet ports for network resilience.

When integrated as a system, the ABB SPQRS22, SPNPM22, SPNIS21, SPIIT13, SPIIL02 L, and SPIET800 deliver a complete and scalable architecture. Field signals enter the ABB SPNIS21 (analog) and ABB SPQRS22 (combined analog and digital) for high integrity signal conditioning. The ABB SPNPM22 aggregates this data and passes it via the ABB SPIIT13 onto the INFI NET backbone. Multiple cabinets communicate using the ABB SPIIL02 L for local expansion or the ABB SPIET800 for long distance Ethernet integration. All modules mount in standard Symphony Plus I/O racks, share common backplane power, and are configured using ABB’s Control Builder or Harmony engineering tools.

For plant maintenance teams and system integrators, these genuine ABB spare parts are essential for sustaining legacy INFI 90 installations or extending modern Symphony Plus systems. Each module is backed by ABB’s global quality certification including CE and UL, with full technical documentation available. Whether replacing a failed analog input card or expanding network connectivity, the ABB SPNIS21, ABB SPIIT13, and the full set provide the reliability and performance that ABB automation solutions are known for worldwide. Contact your ABB authorized distributor to confirm firmware revisions and compatibility before ordering these modules for your specific DCS configuration.