Description
Product Description
The National Instruments (NI) GPIB-140A is a high-speed fiber-optic bus extender designed to extend IEEE-488 / GPIB instrument communication over long distances. It converts electrical GPIB signals into optical signals, enabling point-to-point communication over fiber-optic cable without requiring changes to the existing GPIB software. The GPIB-140A supports transmission distances of up to 1 km and provides buffered and unbuffered operating modes, including HS488 high-speed transfer. It is suitable for automated test equipment, laboratory instrumentation, industrial measurement systems, and applications where electrical isolation between equipment locations is beneficial. The assembly number for this unit is 186135H-01L; confirm the label and power-supply configuration before ordering.
GPIB-140A 186135H-01L
Product Parameters and Datasheet
Brand: National Instruments (NI)
Model: GPIB-140A
Assembly Number: 186135H-01L
Series: GPIB Bus Extension Products
Product Name: Fiber-Optic GPIB Bus Extender
Product Type: IEEE-488 Communication Extension Interface
Communication Standard: IEEE-488 / IEEE-488.2
Transmission Method: Duplex fiber-optic communication
Maximum Extension Distance: Up to 1 km
Fiber Type: 62.5/125 μm multimode fiber
Optical Wavelength: 850 nm
Optical Connector: ST-style duplex fiber connectors
Maximum Transfer Rate: Greater than 1.1 MB/s in buffered non-HS488 mode; greater than 2.8 MB/s with HS488
Architecture: Point-to-point
Operating Modes: Buffered or unbuffered; HS488 enabled or disabled
GPIB Device Capacity: Up to 28 devices in the extension system, including the extenders, subject to system configuration
AC Input Voltage: 100–120 VAC or 220–240 VAC
Input Frequency: 50–60 Hz
Maximum Input Current: 135 mA at 100–120 VAC; 100 mA at 220–240 VAC
Operating Temperature: 0°C to 40°C
Storage Temperature: -20°C to 70°C
Relative Humidity: 10%–90%, non-condensing
Dimensions: Approximately 88.9 × 143.5 × 41.1 mm
Weight: Approximately 0.25 kg
Enclosure: Metal
Place of Manufacture: Not confirmed for the individual unit
Product Status: Legacy product; confirm availability
Country of Origin: Verify the unit label and shipping documentation
Discontinued: Confirm current lifecycle status with NI or the supplier
Recommended NI Models
1. GPIB-140A/2 – Fiber-optic GPIB extender variant supporting distances up to 2 km.
2. GPIB-130 – GPIB bus extender for compatible instrument systems.
3. GPIB-120A – GPIB bus isolator and expander.
4. GPIB-120B – GPIB bus isolator and expander for electrical isolation.
5. GPIB-ENET/100 – Ethernet-to-GPIB interface for networked instrument control.
6. GPIB-ENET/1000 – Gigabit Ethernet-to-GPIB interface.
7. GPIB-USB-HS – High-speed USB-to-GPIB interface.
8. GPIB-USB-B – USB-to-GPIB interface.
9. PCI-GPIB – PCI-based GPIB controller interface.
10. PCI-GPIB+ – PCI GPIB interface with analyzer functionality.
11. PXI-GPIB – PXI-based GPIB controller interface.
12. PCIe-GPIB – PCI Express GPIB controller interface.
13. PCIe-GPIB+ – PCI Express GPIB interface with analyzer functionality.
14. GPIB-232CV-A – GPIB-to-RS-232 interface converter.
15. GPIB-485CT-A – GPIB-to-RS-485 interface converter.
Compatibility Note: The GPIB-140A is a fiber-optic extender, not a standalone computer GPIB controller. A compatible extender is required at the other end of the optical link. Verify the optical cable type, connector style, AC power configuration, and exact assembly number before installation.
