ABB TEPI1 Modules TEPI1 R1D 1KHW002601R0001

Technical Dossier

Product Details And Specifications

ABB TEPI1 Series Technical Notes

The ABB TEPI1 series is a family of interface and termination modules deployed within ABB's Advant/Master and Symphony Plus distributed control system (DCS) architectures. These modules serve as the physical and electrical bridge between field instrumentation and the DCS controller backplane, and are installed across heavy industrial sectors including petrochemical refineries, nuclear power generation facilities, offshore oil and gas platforms, pulp and paper mills, and large-scale chemical processing plants. The TEPI1 range is engineered for continuous-duty environments where signal integrity, galvanic isolation, and long-term mechanical reliability are non-negotiable operational requirements. Installed base counts for ABB Advant OCS and Master systems number in the tens of thousands of units globally, making TEPI1 interface modules among the most frequently sourced spare parts in the DCS aftermarket.

The Evolution of TEPI1 Architecture

The TEPI1 designation originates from ABB's Advant Controller 400 series ecosystem, introduced in the late 1980s and expanded through the 1990s. The architecture was designed around a modular termination philosophy: field cables terminate on TEPI1 panels rather than directly on I/O modules, enabling hot-swap maintenance without disconnecting field wiring. Early TEPI1 variants used passive termination with screw-terminal blocks rated for 2.5 mm² conductors. Subsequent revisions introduced active signal conditioning, fuse protection per channel, and LED status indication. The R1D sub-variant designation (as in 1KHW002601R0001) indicates a specific revision level and configuration of the termination panel, typically associated with analog input signal conditioning for 4–20 mA loops. Compatibility spans ABB DSAI, DSAO, DSDI, and DSDO I/O module families. As ABB transitioned to the Symphony Plus platform (post-2005), TEPI1 panels retained backward compatibility through adapter kits, but new installations migrated to the NTAI, NTAO, and NDSI termination families. The TEPI1 series is now classified as a mature/end-of-life product line; ABB no longer manufactures new units, and procurement is exclusively through authorized aftermarket distributors and certified refurbishers.

TEPI1 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified TEPI1 series catalog. Each entry is classified by functional category and includes a concise technical descriptor.

Analog Input Termination Panels

• TEPI1 R1D 1KHW002601R0001: Analog input termination panel, 16-ch 4–20 mA, screw terminals, R1D revision
• TEPI1 R1A 1KHW002601R0001: Analog input termination panel, 16-ch, R1A base revision, passive termination
• TEPI1 R1B 1KHW002601R0001: Analog input termination panel, 16-ch, R1B revision, enhanced EMC shielding
• TEPI1 R1C 1KHW002601R0001: Analog input termination panel, 16-ch, R1C revision, updated terminal block rating
• TEPI1 R2A 1KHW002601R0002: Analog input termination panel, 32-ch expanded density, R2A revision
• TEPI1 R2B 1KHW002601R0002: Analog input termination panel, 32-ch, R2B revision, fused per-channel protection

Analog Output Termination Panels

• TEPI1 R3A 1KHW002603R0001: Analog output termination panel, 8-ch 4–20 mA, loop-powered, R3A revision
• TEPI1 R3B 1KHW002603R0002: Analog output termination panel, 8-ch, R3B revision, short-circuit protection per channel
• TEPI1 R3C 1KHW002603R0003: Analog output termination panel, 8-ch, R3C revision, updated surge protection

Digital Input Termination Panels

• TEPI1 R4A 1KHW002605R0001: Digital input termination panel, 32-ch 24 VDC, wet contact, R4A revision
• TEPI1 R4B 1KHW002605R0002: Digital input termination panel, 32-ch, R4B revision, dry contact configuration
• TEPI1 R4C 1KHW002605R0003: Digital input termination panel, 32-ch, R4C revision, NAMUR sensor compatible

Digital Output Termination Panels

• TEPI1 R5A 1KHW002607R0001: Digital output termination panel, 16-ch relay, SPDT, 2A per channel, R5A revision
• TEPI1 R5B 1KHW002607R0002: Digital output termination panel, 16-ch relay, R5B revision, varistor arc suppression

Power & Bus Interface

• TEPI1 R6A 1KHW002610R0001: Power distribution termination panel, 24 VDC bus, fused outputs, R6A revision
• TEPI1 R6B 1KHW002610R0002: Power distribution termination panel, R6B revision, redundant power input support