ABB SPH Series Modules

Technical Dossier

Product Details And Specifications

ABB SPH Series: Comprehensive Module Range and Technical Overview

The ABB SPH series represents a dedicated line of hydraulic servo control modules developed for ABB's DCU (Drive Control Unit) platform, widely deployed across global heavy industries including petrochemical refineries, nuclear power auxiliary systems, steel rolling mills, and offshore hydraulic actuation systems. The SPH series interfaces directly with proportional and servo valves, providing closed-loop position, velocity, and force control in safety-critical hydraulic circuits. Its installed base spans decades of continuous operation in plants where replacement cycles are measured in years, not months, making long-term parts availability a primary procurement concern.

The Evolution of SPH Series Architecture

The SPH series was introduced as part of ABB's broader DCU modular control architecture, designed to standardize hydraulic servo interfacing across diverse actuator topologies. Early-generation SPH modules operated on parallel backplane communication with analog command signals (±10 V reference), targeting single-axis hydraulic servo loops. As industrial fieldbus standards matured, ABB integrated PROFIBUS-DP and later PROFINET compatibility into the DCU platform, with SPH modules retaining backward-compatible analog I/O while gaining digital diagnostic channels.

The series progressed through hardware revisions addressing EMI immunity, extended temperature range operation (−10°C to +55°C ambient), and improved LVDT/resolver signal conditioning. Later variants introduced onboard PID auto-tuning and fault memory logging, reducing commissioning time in multi-axis hydraulic presses and injection molding machines. As the DCU platform reached maturity, ABB transitioned newer hydraulic servo applications toward the AC500 and Symphony Plus ecosystems; however, SPH modules remain the only direct replacement for legacy DCU-based hydraulic control cabinets without full system redesign.

SPH Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified SPH series module range within the ABB DCU hydraulic servo control platform. Each entry reflects a distinct functional role within the control architecture:

SPHSS03: Hydraulic servo signal conditioning module; processes LVDT position feedback and generates ±10 V valve command output for single-axis closed-loop control.
SPHSS01: Basic hydraulic servo interface module; analog command input, single servo valve output, manual/auto mode switching.
SPHSS02: Dual-channel servo signal module; supports two independent servo valve outputs with shared reference input.
SPHSS04: High-resolution servo positioning module; 16-bit DAC output, enhanced LVDT signal filtering for precision hydraulic press applications.
SPHSS05: Servo safety interlock module; integrates hardware enable/disable logic with servo command path for SIL-rated hydraulic circuits.
SPHAS01: Analog servo amplifier module; onboard current amplification stage for direct proportional valve drive without external amplifier.
SPHAS02: Dual-output analog servo amplifier; supports master-slave valve configurations in large-bore hydraulic cylinders.
SPHAS03: High-current servo amplifier module; rated for high-flow servo valves in heavy hydraulic actuators (steel mill, forging press).
SPHDI01: Digital input interface module for SPH rack; 24 V DC discrete inputs for limit switches, position sensors, and safety interlocks.
SPHDI02: Expanded digital input module; 32-channel DI with status LED per channel and group fault reporting to DCU CPU.
SPHDО01: Digital output module for SPH rack; 24 V DC sourcing outputs for solenoid valve pilots and indicator circuits.
SPHDO02: High-current digital output module; relay-contact outputs for hydraulic pump motor starters and emergency dump valve control.
SPHPS01: Rack power supply module for SPH series; 24 V DC regulated backplane power, redundancy-capable with hot-swap support.
SPHPS02: Redundant power supply module; dual-input power feed with automatic switchover for continuous hydraulic control availability.
SPHCM01: Communication adapter module; PROFIBUS-DP slave interface for SPH rack integration into plant-wide DCS/SCADA networks.
SPHCM02: Ethernet communication module; Modbus TCP and PROFINET IO support for SPH series in modernized control architectures.
SPHCPU01: Rack controller module; coordinates multi-axis SPH servo loops, executes sequence programs, manages fault logging and alarm outputs.

Sourcing Hard-to-Find & Obsolete SPH Series Parts

The ABB SPH series has entered the mature-to-end-of-life phase of its product lifecycle. ABB has formally discontinued active production of several SPH module variants, with official support transitioning to newer platform equivalents. For plant operators running DCU-based hydraulic control systems, this creates a critical sourcing gap: full system migration is capital-intensive and operationally disruptive, while individual module failures require immediate like-for-like replacement to restore production.

DriveKNMS maintains a dedicated inventory of SPH series modules sourced through authorized surplus channels, decommissioned plant buybacks, and verified OEM stock. All units are cataloged by part number, hardware revision, and firmware version to ensure compatibility with existing DCU rack configurations. For end-users requiring long-term maintenance contracts or scheduled spare parts kitting for turnaround maintenance, DriveKNMS provides multi-year supply agreements covering the full SPH module range. Obsolete modules with no direct ABB replacement are cross-referenced against compatible third-party equivalents where applicable, with full disclosure of any functional differences.

Quality Control for the SPH Series Range

SPH series modules present specific test challenges due to their mixed analog/digital architecture and direct interface with hydraulic servo valves. DriveKNMS applies a dedicated test protocol for each SPH module prior to shipment:

Backplane communication integrity is verified by installing each module into a reference DCU rack and confirming error-free data exchange at rated cycle times. Analog output channels (servo valve command signals) are calibrated against a precision reference load, with linearity and offset error measured across the full ±10 V output range. LVDT signal conditioning circuits are tested using a calibrated LVDT simulator across the full stroke range, verifying gain, phase, and null-point accuracy. Digital I/O channels are functionally tested under rated load conditions. Power supply modules are load-tested at 100% rated current with input voltage varied across the specified tolerance band. All modules are subjected to a 48-hour burn-in cycle under operational conditions before final inspection and packaging.

For procurement inquiries, technical compatibility questions, or bulk spare parts requirements for the ABB SPH series: