ABB SPAU140C Numerical Synchro‑Check Relay

• Brand
  ABB
• Model
  SPAU140C
• Product Name
  Numerical Synchro‑Check Relay
• Place of Origin
  Finland
• HS Code
  85372090
• Dimensions
  145 mm × 145 mm × 100 mm
• Weight
  0.80 kg
• Operating Temperature
  -10℃ to +55℃
• Storage Temperature
  -40℃ to +85℃
• Power Supply
  250 V AC/DC
• Warranty
  12 month
• Product Status
  new brand

Compatibility List for ABB SPAU140C Synchro-Check Relay

1. Compatible Items

1.1 Communication Bus Modules

SPA-ZC21 BB: SPA bus optical module with plastic fiber, self-powered by SPAU140C

SPA-ZC21 MM: SPA bus optical module with glass fiber, self-powered by SPAU140C

SPA-ZC17 BB: SPA bus optical module with plastic fiber, external auxiliary power supply required

SPA-ZC17 MM: SPA bus optical module with glass fiber, external auxiliary power supply required

SPA-ZC302: SPA-bus to Profibus-DPV1 protocol gateway

1.2 ABB SPA-Series Protection Relays (SPA Bus Coexistence)

SPAA120C, SPAA121C, SPAC310C, SPAC312C, SPAC315C, SPAD346C, SPAF140C, SPAJ140C, SPAM150C, SPAU110C, SPAU121C, SPAU130C, SPAU320C1, SPAU330C

1.3 Upper-Level Systems & Software Tools

SACO148D4: SPA-bus data communicator and front-end unit

ABB SPACOM software: Legacy configuration tool for parameter setup, fault event reading and device diagnosis

SCADA/RTU systems supporting Modbus-RTU and DNP3 protocols over RS-485

Standard medium-voltage switchgear panels and DIN-rail mounting structures (mechanical dimension compatible)

1.4 Supported Communication Protocols

SPA Bus (ASCII protocol, 4800/9600 baud rate)

Modbus-RTU over RS-485
 DNP3 over RS-485

1.5 Auxiliary Power Supply Range

AC: 80 VAC ~ 265 VAC

DC: 18 VDC ~ 80 VDC

2. Incompatible / Unsupported Items

IEC 61850 MMS/GOOSE: No native hardware support for IEC 61850 process bus communication; a third-party protocol converter is mandatory for interconnection.

REX-series SPA bus modules: SPA-ZC22, SPA-ZC23 and other new-generation REX-series optical modules are incompatible due to mechanical structure and firmware version mismatch.

REX/RET series IEDs: REX615, REX640, RET670 and other modern IEDs cannot operate on the traditional SPA bus. They are only used for equipment retrofit, not plug-and-play compatible with SPAU140C.

Unsupported field buses: No onboard interface and driver support for LON bus, MVB and EtherNet/IP protocols.

Modern configuration software: ABB PCM600 tool does not support SPAU140C; only the legacy SPACOM software is available for configuration and diagnosis.

Direct optical connection with REX/RET devices: Mismatched physical optical layer and communication protocols, data transmission is unavailable without an external gateway.

Non-standard power supply: Power supply beyond 18–80 VDC / 80–265 VAC is unsupported. 24 VDC supply is unstable and not guaranteed if the voltage drops below 18 VDC.

Protocols supported by ABB SPAU140C

SPA Bus (ABB proprietary ASCII protocol, baud rate: 4800 / 9600 bps)

Modbus‑RTU over RS‑485

DNP3 over RS‑485

Notes:

No native IEC 61850 (MMS / GOOSE). Requires external protocol gateway.

No TCP‑IP / Ethernet onboard. All communication is serial‑based.

SPA bus is for inter‑IED communication within SPA‑series protection family.

Modbus‑RTU and DNP3 are used for connection to SCADA / RTU host system.