NI GPIB‑140A

Maximum Supported GPIB‑device Quantity: 28 units (including two extenders) Compatible Standard: IEEE 488.1, IEEE 488.2, HS488 high‑speed‑protocol Sustained Data Throughput: 1.5 MB/s, HS488 up to 8 MB/s Transmission‑medium: Multimode optical‑fiber Power‑supply: External DC power‑supply for each‑unit

Functional Features:

Fully‑software‑transparent for upper‑layer application‑programs, no modification needed for existing GPIB‑software. Optical‑fiber transmission completely eliminates ground‑loop‑interference and common‑mode‑electrical‑noise. Breaks the 20‑meter distance‑limitation of original IEEE‑488 electrical‑cable. Supports parallel‑poll GPIB‑bus‑functions. Pair‑operation requirement: one transmitter‑unit matches one receiver‑unit.

Application Scenarios:

Automatic‑test‑equipment (ATE) systems, aerospace‑component‑test‑laboratories, long‑distance distributed‑instrument‑measurement‑systems, high‑electromagnetic‑interference industrial‑test‑sites, remote‑control‑laboratory‑instrument‑systems, production‑line‑calibration‑test‑stations.

Working Principle:

Local‑side GPIB‑140A monitors all GPIB‑bus‑signals, converts electrical‑GPIB‑signal‑data into optical‑signal and transmits over multimode‑fiber. Remote‑side matching‑GPIB‑140A converts optical‑signal back to standard IEEE‑488 electrical‑bus‑signal. Bidirectional‑optical‑transmission realizes fully‑transparent long‑distance‑extension of GPIB‑bus.

Material Composition:

Metal‑enclosed‑housing, optical‑transceiver‑module, high‑speed‑digital‑logic‑circuit‑board, GPIB‑bus‑connector, optical‑fiber‑interface‑connector, power‑input‑terminal‑block.

Structural Characteristics:

Desktop‑metal‑enclosed‑box‑structure, rear‑panel GPIB‑IEEE‑488‑connector, optical‑fiber‑port, power‑supply‑input‑interface, front‑panel bus‑status‑indicator‑LEDs.

Installation Requirements:

Use in matched‑pair configuration. Deploy multimode‑optical‑fiber‑cable within 1000‑meter‑limit. Complete optical‑fiber‑connector‑clean‑before‑connection. Supply regulated‑DC‑power‑supply for each‑extender‑unit. Connect local‑side GPIB‑bus‑to controller‑system, remote‑side‑to‑instrument‑group‑bus.

Usage Notes:

Do not exceed maximum 1000‑meter‑fiber‑transmission‑distance. Avoid optical‑fiber‑connector‑surface‑contamination. Maintain total‑device‑quantity within 28‑unit limit. Existing GPIB‑application‑software runs without modification, but system‑configuration must treat paired‑extenders as two‑bus‑devices on extended‑bus‑segment.