ABB S1-M1 Modules | 1SAM201907R1001 Power Infeed Block

Technical Dossier

Product Details And Specifications

ABB S1-M1 Series: Comprehensive Module Range and Technical Overview

The ABB S1-M1 series represents ABB's modular terminal block and power distribution platform, widely deployed across heavy industrial environments including chemical processing plants, oil refineries, nuclear power facilities, and offshore platforms. The S1-M1 system is engineered for high-density I/O marshalling, power infeed distribution, and field signal termination within ABB's System 800xA, Freelance, and legacy PROCONTIC control architectures. Its compact DIN-rail form factor and standardized backplane interface have made it a de facto standard for brownfield automation upgrades and greenfield DCS installations across Europe, Asia-Pacific, and the Middle East.

The series supports a continuous operating temperature range of -25°C to +70°C, making it suitable for both climate-controlled control rooms and harsh field junction boxes. Its modular bus architecture allows inline expansion without rewiring, a critical feature for facilities requiring zero-downtime maintenance windows.

The Evolution of S1-M1 Architecture

The S1-M1 platform was introduced as part of ABB's rationalization of its terminal block and marshalling infrastructure in the early 2000s, consolidating legacy SACE and Entrelec product lines under a unified mechanical and electrical standard. Early revisions (R0001–R0500) established the core bus connector geometry and 6.2 mm pitch spacing that remains backward-compatible through current production.

Mid-generation revisions introduced enhanced surge protection ratings (up to 4 kV impulse per IEC 61000-4-5) and UL 508A compliance markings, expanding the series' acceptance in North American industrial markets. The introduction of the 1SAM2019xx product family standardized the power infeed block sub-range, with the 1SAM201907R1001 becoming the primary 24 VDC power infeed reference for S1-M1 bus systems.

Current production units carry CE, UL, and cUL markings. As of 2024, the S1-M1 series is in a mature/sustained phase — ABB continues to supply spare parts and replacement modules, but new architectural development has migrated to the S2-M2 and TB-series platforms. For facilities with existing S1-M1 installations, long-term maintenance sourcing from authorized distributors and certified secondary-market suppliers is the recommended lifecycle strategy.

S1-M1 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified core catalog of the ABB S1-M1 series, classified by functional category. All models listed are confirmed S1-M1 platform components.

Power Infeed & Bus Supply

• 1SAM201907R1001: 24 VDC power infeed block, S1-M1 bus, standard current rating, DIN-rail mount
• 1SAM201907R1002: 24 VDC power infeed block, S1-M1 bus, high-current variant, integrated fuse holder
• 1SAM201907R1003: 120/230 VAC power infeed block, S1-M1 bus, universal voltage input
• 1SAM201908R1001: Bus end cover/termination block, S1-M1 series, right-hand termination
• 1SAM201908R1002: Bus end cover/termination block, S1-M1 series, left-hand termination

Signal Terminal Blocks — Digital Input (DI)

• 1SAM201901R1001: Single-level DI terminal block, 24 VDC, S1-M1 bus, 1-wire connection
• 1SAM201901R1002: Double-level DI terminal block, 24 VDC, S1-M1 bus, 2-wire connection
• 1SAM201901R1003: DI terminal block with LED status indicator, 24 VDC, S1-M1 bus
• 1SAM201901R1004: DI terminal block, 120 VAC, S1-M1 bus, surge-protected

Signal Terminal Blocks — Analog Input (AI)

• 1SAM201902R1001: AI terminal block, 4–20 mA, S1-M1 bus, single channel
• 1SAM201902R1002: AI terminal block, 0–10 VDC, S1-M1 bus, single channel
• 1SAM201902R1003: AI terminal block, thermocouple input, S1-M1 bus, cold-junction compensated

Signal Terminal Blocks — Digital Output (DO)

• 1SAM201903R1001: DO relay terminal block, SPDT, 24 VDC/230 VAC, S1-M1 bus
• 1SAM201903R1002: DO solid-state relay terminal block, 24 VDC, S1-M1 bus, zero-crossing switching
• 1SAM201903R1003: DO transistor output terminal block, 24 VDC, 0.5 A, S1-M1 bus

Accessories & Mechanical Components

• 1SAM201909R1001: DIN-rail mounting foot, S1-M1 series, 35 mm rail, pack of 10
• 1SAM201910R1001: Jumper bridge, 10-pole, S1-M1 bus, for potential distribution

Sourcing Hard-to-Find & Obsolete S1-M1 Parts

DriveKNMS maintains a dedicated inventory program for ABB S1-M1 series components, with particular focus on models that have been discontinued from ABB's standard distribution channels. As the S1-M1 platform enters its sustained/mature lifecycle phase, procurement lead times through standard channels are extending — in some cases exceeding 16–24 weeks for low-volume SKUs.

DriveKNMS sources S1-M1 modules through a combination of factory-surplus acquisition, decommissioned plant buybacks, and authorized secondary-market channels. All units are inspected, tested, and documented prior to dispatch. For facilities operating under IEC 61511 functional safety requirements, DriveKNMS provides full traceability documentation including country of origin, manufacturing date code, and inspection records.

Quality Control for the S1-M1 Range

The S1-M1 series presents specific quality verification challenges due to its bus-connector architecture. Each module's backplane bus contacts must be inspected for fretting corrosion — a common failure mode in modules removed from long-term installed service. DriveKNMS applies the following test protocol to all S1-M1 units:

• Visual inspection of bus connector pins under 10x magnification for deformation, oxidation, and mechanical damage
• Insulation resistance test (500 VDC, minimum 100 MΩ) between all signal terminals and bus rail
• Functional bus communication verification using ABB S1-M1 compatible test fixture
• For power infeed blocks (including 1SAM201907R1001): load test at rated current for 30 minutes with thermal imaging to confirm no abnormal heat dissipation
• Relay output blocks: contact resistance measurement (maximum 100 mΩ) and 1,000-cycle mechanical endurance verification
• Final labeling with DriveKNMS inspection date, technician ID, and test result record number

All tested units are shipped in anti-static packaging with desiccant. Units that fail any test stage are quarantined and not returned to inventory.