ABB SNAT604IFS 3AUA0000019968 Relay Interface Board

ABB SNAT604IFS (Order Number: 3AUA0000019968) Relay Interface Board Details
I. Correspondence of Part Numbers
Board card silk-screen model: SNAT604IFS (commonly in hardware version REV B, internal board code 61029052)
ABB official external order / customs declaration part number: 3AUA0000019968
For export PI, customs declaration, customer order, overseas reconciliation, 3AUA0000019968 must be used; SNAT604IFS is the internal model of the board card, and the two are the same component.

 Compatibility with Drive Equipment
DCS600 series DC speed regulators (core application): excitation circuit control, excitation switching, excitation fault signal feedback
ACS600 high-power AC frequency converter: cabinet door interlock, fan failure, emergency stop, internal fault signal isolation and conversion output
⚠️ Not compatible with subsequent new frequency converters / DC speed regulators such as ACS800, ACS510, ACS550, ACS580.

Hardware Structure and Core Functions
Hardware Composition
Board-mounted multiple groups of miniature industrial relays, filter capacitors, European-style plug-in terminals, board-to-board wiring sockets, power taken from the transmission backplane, PCB with three-proof coating, suitable for control cabinet high-temperature and dusty industrial environment.
Main Function
Excitation control (DCS600): control the start and stop of the excitation unit, collect the excitation operation status, immediately feedback the excitation abnormality to the main control board, speed regulator reports excitation failure and prohibits excitation start, protecting the excitation winding of the motor.
Safety interlock isolation (ACS600): through relays perform electrical isolation for cabinet door opening, cooling fan stop, external emergency stop, etc., output passive dry contacts to DCS/PLC, blocking on-site surge interference and breakdown of the main control CPU.
Fault dry contact expansion: external wiring of the internal fault contacts of the frequency converter, convenient for central control remote monitoring of the transmission operation status.

Lifecycle and Spare Parts Status
The DCS600/ACS600 drive platform has already been discontinued by the original factory (EOL);
The new original factory spare parts for 3AUA0000019968 have an extremely long delivery period, and the market circulation mainly consists of disassembled test boards and repair refurbished boards, which are frequent spare parts for maintenance and maintenance of old direct drive systems;
High repairability: relay contacts burnout, capacitor aging and false soldering, terminal oxidation can be replaced with components for repair and reuse, without directly scrapping the entire board.