MOELLER PS416 Modules: PS416-INP-401

Technical Dossier

Product Details And Specifications

MOELLER PS416 Series: Comprehensive Module Range and Technical Overview

The Moeller PS416 (now under the Eaton brand following the 2008 acquisition) is a modular programmable logic controller platform that achieved significant installed base across heavy industrial sectors including chemical processing plants, oil refineries, nuclear auxiliary systems, and continuous manufacturing lines throughout Europe, Asia, and the Americas. Its rack-based architecture, deterministic scan cycle, and broad I/O density made it a preferred control platform for process automation projects from the mid-1990s through the 2010s. Many PS416-based systems remain in active service, creating sustained demand for spare modules, particularly digital and analog I/O cards, CPU units, and communication adapters.

The Evolution of PS416 Architecture

The PS416 platform was introduced by Moeller Electric in the mid-1990s as a successor to earlier relay-logic and first-generation PLC systems. The architecture is built around a passive backplane bus that supports hot-swap-capable I/O modules in most configurations. Early generations used proprietary Suconet K fieldbus for distributed I/O expansion; later revisions added PROFIBUS-DP and Ethernet-based communication options, extending the platform's integration capability into modern SCADA and DCS environments.

The CPU modules evolved from the PS416-CPU-100 series (limited memory, fixed scan) to the PS416-CPU-400 series (expanded program memory, floating-point arithmetic, online change capability). I/O density increased across generations, with later analog modules offering 16-channel configurations versus the 4- and 8-channel cards of earlier revisions. As of 2015, Eaton formally transitioned PS416 to end-of-life status for new project design, though repair, replacement, and spare parts support continued through authorized channels and specialist distributors.

Compatibility note: PS416 modules are slot-addressed and backplane-specific. Modules from different sub-generations may share physical form factors but differ in firmware handshake requirements. Always verify CPU firmware version against module compatibility matrices before substitution.

PS416 Full Catalog & Functionalities (SKU List)

CPU / Controller Modules

• PS416-CPU-100: Base CPU, 16 KB program memory, fixed scan cycle, Suconet K master
• PS416-CPU-200: Mid-range CPU, 64 KB program memory, expanded data memory, IEC 61131-3 compliant
• PS416-CPU-300: Enhanced CPU, 128 KB program memory, floating-point support, online change
• PS416-CPU-400: High-performance CPU, 512 KB program memory, multi-tasking, Ethernet-ready

Digital Input Modules

• PS416-INP-401: 16-channel 24 VDC digital input module, sink/source configurable, diagnostic per channel
• PS416-INP-402: 32-channel 24 VDC digital input module, high-density rack format
• PS416-INP-410: 16-channel 120 VAC digital input module, optically isolated inputs
• PS416-INP-420: 16-channel 230 VAC digital input module, CE-rated, panel-mount compatible

Digital Output Modules

• PS416-OUT-401: 16-channel 24 VDC transistor output, 0.5 A per channel, short-circuit protected
• PS416-OUT-402: 32-channel 24 VDC transistor output, high-density, group fusing
• PS416-OUT-410: 8-channel relay output module, 2 A per channel, NO contacts
• PS416-OUT-420: 16-channel relay output module, mixed NO/NC, 230 VAC rated

Analog I/O Modules

• PS416-AIN-401: 8-channel analog input, 4–20 mA / 0–10 V selectable, 12-bit resolution
• PS416-AIN-402: 16-channel analog input, 4–20 mA, 14-bit resolution, HART-transparent option
• PS416-AOU-401: 4-channel analog output, 4–20 mA / 0–10 V, 12-bit DAC
• PS416-AOU-402: 8-channel analog output, 4–20 mA, 14-bit DAC, short-circuit protected

Communication & Network Adapters

• PS416-COM-100: Suconet K master adapter, up to 31 remote I/O stations
• PS416-COM-200: PROFIBUS-DP master/slave module, 12 Mbit/s, GSD file supported
• PS416-COM-300: Modbus RTU/TCP gateway module, RS-485 and RJ45 ports

Power Supply Modules

• PS416-POW-100: 24 VDC rack power supply, 5 A output, redundancy-capable
• PS416-POW-200: 24 VDC redundant power supply module, hot-swap, status LED

Sourcing Hard-to-Find & Obsolete PS416 Parts

Eaton's formal end-of-life declaration for the PS416 platform has created a supply gap for facilities that cannot justify a full control system migration within current capital budgets. DriveKNMS maintains a dedicated inventory of new-surplus, refurbished, and tested-used PS416 modules sourced through decommissioned plant equipment, authorized distributor overstock, and direct OEM channel partnerships.

For obsolete CPU variants (PS416-CPU-100, PS416-CPU-200) and legacy communication adapters (PS416-COM-100 Suconet K), DriveKNMS provides cross-reference verification, firmware version matching, and compatibility documentation to ensure drop-in replacement without reprogramming. Long-term maintenance contracts covering annual inspection, spare pool management, and emergency dispatch are available for facilities with multi-rack PS416 installations.

Quality Control for the PS416 Range

PS416 modules present specific test challenges due to their backplane bus communication protocol and slot-addressed firmware initialization. DriveKNMS employs a dedicated PS416 test rack replicating the original Moeller backplane environment. Each module undergoes the following verification sequence:

• Visual inspection: PCB condition, connector pin integrity, capacitor health, conformal coating assessment
• Power-on self-test: Module firmware boot verification against known-good CPU handshake
• Functional I/O test: All channels exercised at rated voltage and current; analog modules calibrated against traceable reference standards
• Communication bus test: Backplane data exchange verified at full scan rate under simulated load
• Burn-in: 48-hour continuous operation at rated conditions prior to shipment
• Documentation: Test report issued with each unit, including channel-by-channel pass/fail data