ABB SNAT609TAI 61073779 Tachometer and I/O Interface Board

The ABB SNAT609TAI 61073779 is a dedicated tachometer and I/O interface board for ABB DCS800 DC drive systems. It collects tachometer speed feedback and discrete field signals, and establishes high‑speed data links between the SNAT602TAC terminal board and SNAT603CNT main control board inside the drive cabinet.

This plug‑in PCB adopts flat‑cable interconnection and optical communication design to resist industrial electromagnetic interference. Original production has been discontinued. It is widely supplied as aftermarket spare parts for paper machinery, metallurgical rolling equipment and heavy‑duty DC drive cabinet maintenance and renovation.

Main Specifications

1. Brand:ABB; Model:SNAT609TAI, Part No:61073779; Type:Tachometer & I/O Interface PCB
2. Compatible Equipment:ABB DCS800 digital DC variable‑speed drive series
3. Signal Function:Tachometer speed signal acquisition and digital I/O signal transmission
4. Internal Connection:40‑pin and 36‑pin flat cables for linking matched ABB drive boards
5. Anti‑interference Design:Fiber‑optic communication interface for noise‑free data transmission
6. Installation Mode:Plug‑in type, installed in the inner slot of DCS800 drive control cabinet
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Receive pulse signals from the motor tachometer and convert them into accurate real‑time speed data.
2. Transmit field digital interlock and fault signals from the terminal board to the main drive controller.
3. Realize optical isolation data transmission to eliminate electromagnetic interference from high‑power circuits.
4. Coordinate signal interaction between SNAT602TAC and SNAT603CNT to form a complete closed‑loop speed‑regulation system.
5. Detect abnormal tachometer circuit and I/O channel failures and feed fault information back to the drive system.
6. Serve as the intermediate speed‑feedback and signal transfer bridge of the DCS800 DC drive unit.

Application Scenarios

1. Metallurgical rolling lines, paper making machines, mine hoists and heavy‑load DC motor speed‑regulating equipment.
2. Spare interface board replacement and daily maintenance of existing ABB DCS800 drive control racks.
3. Technical transformation and signal stability improvement of aging large‑power DC drive control cabinets.
4. On‑site troubleshooting and replacement of faulty tachometer interface boards on continuous heavy industrial production lines.
5. Spare‑parts stocking for system integrators and professional ABB DC drive automation maintenance contractors.
6. Global aftermarket spare supply for technicians maintaining obsolete ABB legacy DC drive hardware.

FAQ

1. Q:What is the relationship between SNAT609TAI and 61073779?
   A:SNAT609TAI is the circuit board model, while 61073779 represents the official ABB spare part code.
2. Q:Can this board work independently without other SNAT series boards?
   A:No, it must cooperate with SNAT602TAC and SNAT603CNT to complete the whole drive control loop.

3. Q:Is this tachometer interface board still in original production?
   A:ABB has stopped manufacturing this model, only tested surplus and refurbished spare units are available.