Description
Product Description
The National Instruments GPIB-140A (186135F-31) is a fiber-optic bus extender designed to extend IEEE 488 GPIB communication over long distances while maintaining electrical isolation between connected systems. It supports buffered and unbuffered operation and is suitable for automated test systems, laboratory instrumentation, and remote instrument control. A pair of compatible units is typically used to establish the fiber-optic link.
GPIB-140A
Product Parameters and Datasheet
| Parameter | Details |
|—|—|
| Brand | National Instruments (NI) |
| Model | GPIB-140A |
| Part Number | 186135F-31 |
| Series | GPIB Bus Extension |
| Product Name | Fiber-Optic GPIB Bus Extender |
| Interface | IEEE 488 / IEEE 488.2 GPIB |
| Maximum Extension Distance | Up to 1 km per extension |
| Maximum Transfer Rate | Over 1.1 MB/s in buffered non-HS488 mode; over 2.8 MB/s with HS488 |
| Fiber Connector | ST-style optical connectors |
| Power Requirements | 100–120 VAC or 220–240 VAC, 50/60 Hz; regional unit dependent |
| Dimensions | Approx. 88.9 × 143.5 × 41.1 mm |
| Weight | Approx. 0.25 kg |
| Place of Manufacture / Country of Origin | Not confirmed; check product label |
| Product Status | Legacy product; confirm unit condition |
| Discontinued | Legacy / limited support; confirm current availability |
Recommended Related NI Models
1. GPIB-140A/2 — Fiber-optic GPIB extender with a longer specified extension range.
2. GPIB-120A — GPIB bus isolator and expander.
3. GPIB-130 — GPIB bus extender.
4. GPIB-USB-HS — USB-to-GPIB interface.
5. GPIB-USB-B — USB-to-GPIB interface.
6. PCI-GPIB — PCI GPIB instrument-control interface.
7. PCI-GPIB+ — PCI GPIB interface with analyzer functionality.
8. PCIe-GPIB — PCI Express GPIB interface.
9. PCIe-GPIB+ — PCI Express GPIB interface with analyzer functionality.
10. PXI-GPIB — PXI GPIB instrument-control interface.
11. PXI-8232 — PXI Ethernet interface for test systems.
12. GPIB-ENET/100 — Ethernet-to-GPIB controller.
13. GPIB-ENET/1000 — Gigabit Ethernet-to-GPIB controller.
14. GPIB-232CV-A — Serial-to-GPIB controller.
15. GPIB-485CT-A — RS-485-to-GPIB controller.
Compatibility Note
Confirm the full assembly number, optical connector type, power-supply version, and fiber specifications before ordering. The GPIB-140A and GPIB-140A/2 are different variants and should not be treated as interchangeable without checking the system requirements.
