I. Basic Information

Model: A58948-001

Manufacturer: MOOG Inc. (USA)

Weight: 0.43 kg

Application: MOOG's old servo controller, electro-hydraulic control system, hydraulic test bench, aerospace/industrial servo control unit

Current status: Long停产 by the original factory， no official replacement model， relying on the spare parts market

II. Function positioning (same series as A58227-001)

A58948-001 is the core digital logic board in MOOG's early servo/hydraulic controllers. Its functions belong to the "buffer/register/control logic" family as you just checked for A58227-001：

System timing and control logic： servo closed-loop control， PID calculation， timing generation， state machine management

I/O signal buffering and driving： digital input/output latches， level conversion， long-distance driving

Data registers and bus interfaces： exchanging data with the main control CPU， analog board， communication board

Fault monitoring and protection： overcurrent， overvoltage， temperature， servo valve break-line diagnosis and protection

Typically used in： MOOG D072， D791， 7000 series servo controllers， electro-hydraulic test systems， material testing machines， aerospace engine control.

III. Specifications (general industrial grade， common to the same series)

Power supply： ±15VDC， +5VDC (backplane power supply)

Logic level： TTL/CMOS

Channels： 16/32-bit parallel data， multiple DI/DO

Operating temperature： 0℃ ~ +55℃

Size： standard Eurocard / rack-mounted card

Interface： gold fingers / socket， compatible with MOOG's dedicated backplane

IV. Market and price (2026 reference， CAD)

New original factory inventory (very few)： approximately 5，300 CAD

New pieces (surplus)： approximately 4，600 CAD

Refurbished / tested qualified： approximately 4，200 CAD

Dismantled second-hand (no warranty)： lower price， high risk

V. Differences from A58227-001 (quick distinction)

A58227-001：偏向缓冲寄存器 (Buffer Register)， focusing on data latching / bus interface

A58948-001：偏向控制逻辑 (Control Logic)， focusing on servo closed-loop and timing control

Both are often used together in the same controller.

VI. Alternative suggestions

There is no direct replacement model. You can only：

Search for refurbished / dismantled spare parts for replacement

Upgrade the controller as a whole (such as MOOG D792， G392 or third-party servo)

Prioritize selecting refurbished items with warranty， which offers the highest cost-effectiveness.