GPIB‑140A

National Instruments GPIB Bus Extender (IEEE 488.1/488.2 / HS488)

General Description

Part Numbers

• Model: GPIB‑140A (1 km) / GPIB‑140A/2 (2 km)

• NI PN: 777997‑01 / ‑02 / ‑03 / ‑04 / ‑05 / ‑06 (variants)

• Alternate: 186135G‑01

Key Specifications

• Max Distance: 1 km (GPIB‑140A) / 2 km (GPIB‑140A/2)

• Max Devices: 31 (up from 15 standard)

• Data Rate:

  • IEEE 488.1: 1.1 Mb/s

  • HS488: 2.8 Mb/s (GPIB‑140A/2 up to 7.2 Mb/s)

• Compatibility: IEEE 488.1, IEEE 488.2, HS488

• Connectors:

  • GPIB: 24‑pin IEEE 488 male

  • Power: DC jack

• Power: +5 VDC, 500 mA max

• Operating Temp: ‑20 °C to +55 °C

• Dimensions: 141 × 102 × 25 mm (5.56 × 4.02 × 0.98 in)

• Weight: 0.2 kg (0.44 lb)

Main Features

• Transparent extension: No software changes; works with existing NI‑488.2 / LabVIEW code

• Buffered architecture: Regenerates signals for long‑distance, noise‑immune operation

• HS488 high speed: Supports fastest GPIB transfers for high‑throughput test systems

• Device expansion: Doubles instrument count to 31 for large test benches

• Compact rugged metal case: For lab and industrial environments

• LED indicators: Power and activity for quick diagnostics

Applications

• Large test systems: Long‑distance GPIB control in R&D/manufacturing labs

• Distributed instrumentation: Control oscilloscopes, DMMs, power supplies, spectrum analyzers over 1–2 km

• Production ATE: High‑speed, multi‑instrument automated test equipment

• Legacy system upgrades: Extend life of existing GPIB test setups

Compatibility

• Works with all NI GPIB controllers (PCIe‑GPIB, USB‑GPIB, etc.)

• Software: NI‑488.2 driver, LabVIEW, LabWindows/CVI

Replacement Note