Emerson SP2401

Technical Dossier

Product Details And Specifications

Emerson SP Series Technical Notes

The Emerson SP Series represents a family of programmable logic controller (PLC) and safety instrumented system (SIS) I/O and control modules deployed extensively across global heavy industry. Installations span petrochemical complexes, offshore platforms, nuclear power facilities, LNG terminals, and continuous-process refineries. The SP Series is recognized for its deterministic scan-cycle performance, redundant backplane architecture, and compatibility with Emerson's broader DeltaV and PROVOX control ecosystems. Its modular form factor allows field engineers to replace individual I/O cards without full rack shutdown, a critical requirement in facilities operating under 24/7 uptime mandates.

The Evolution of SP Series Architecture

The SP Series originated as a discrete I/O expansion platform for Emerson's legacy PROVOX distributed control system, introduced in the late 1980s. Early modules operated on a proprietary parallel backplane bus with fixed-address slot assignment. Through the 1990s, Emerson migrated the series toward a serialized backplane protocol, enabling hot-swap capability and online diagnostics — features that became standard with the SP2000-generation hardware.

SP Series Full Catalog & Functionalities (SKU List)

Digital Output (DO) Modules

• SP2401: 24-channel 24 VDC digital output module, solid-state switching, 0.5 A per channel
• SP2402: 16-channel 120 VAC digital output module, triac output, isolated commons
• SP2403: 8-channel relay output module, Form C contacts, 2 A @ 30 VDC / 0.5 A @ 120 VAC
• SP2404: 32-channel 24 VDC digital output, high-density, grouped commons, diagnostic per channel

Digital Input (DI) Modules

• SP2201: 32-channel 24 VDC digital input module, sink/source configurable, 3 ms filter
• SP2202: 16-channel 120 VAC digital input module, optical isolation, 10 ms filter
• SP2203: 16-channel 24 VDC digital input, high-speed, 0.1 ms filter, counter-capable
• SP2204: 32-channel 48 VDC digital input module, grouped commons, LED status per channel

Analog Input (AI) Modules

• SP3101: 8-channel 4–20 mA analog input, 12-bit resolution, HART pass-through per channel
• SP3102: 16-channel 4–20 mA analog input, 13-bit resolution, multiplexed HART
• SP3103: 8-channel thermocouple/RTD input, universal sensor type, 16-bit resolution
• SP3104: 4-channel high-speed analog input, 16-bit, 1 kHz sample rate, differential input

Analog Output (AO) Modules

• SP3201: 8-channel 4–20 mA analog output, 12-bit resolution, HART pass-through
• SP3202: 4-channel 4–20 mA analog output, 16-bit resolution, loop-powered diagnostics

CPU / Controller Modules

• SP5101: Single-slot CPU module, 32 MB RAM, Ethernet + serial ports, IEC 61131-3 runtime
• SP5102: Redundant CPU module pair, hot-standby switchover <10 ms, 64 MB RAM

Communication Adapter Modules

• SP6101: PROFIBUS DP master/slave adapter, up to 12 Mbps, 125 node support
• SP6102: Modbus RTU/TCP gateway module, dual-port Ethernet, 247 slave address range

Power Supply Modules

• SP7101: 24 VDC rack power supply, 10 A output, redundancy-capable, active current sharing
• SP7102: 120/240 VAC universal input power supply, 15 A, hot-swap with SP7101 in redundant pair

Quality Control for the SP Series Range

SP Series modules present specific test challenges due to their multi-layer backplane connector interface and serialized bus communication protocol. DriveKNMS applies the following test procedures to all SP Series units prior to shipment: