National Instruments
National Instruments GPIB-120A
Bus Expander / Isolator
GPIB Bus Extender / Isolator Function
IEEE 488.1 / IEEE 488.2 Compatible Interface Standard
2 (one system-side, one instrument-side) Number of GPIB Ports
Up to 1.5 MB/s (HS488 compatible) Maximum Data Transfer Rate
Up to 500 V DC (channel-to-channel isolation) Isolation Voltage
| Attribute | Value |
|---|---|
| Function | GPIB Bus Extender / Isolator |
| Interface Standard | IEEE 488.1 / IEEE 488.2 Compatible |
| Number of GPIB Ports | 2 (one system-side, one instrument-side) |
| Maximum Data Transfer Rate | Up to 1.5 MB/s (HS488 compatible) |
| Isolation Voltage | Up to 500 V DC (channel-to-channel isolation) |
| Maximum Number of Instruments Supported | Up to 14 instruments per GPIB bus segment |
| Cable Length Extension | Extends GPIB cable length beyond standard 20-meter limit |
| Power Requirements | Powered via GPIB bus (no external power supply required) |
| Operating Temperature Range | 0°C to 55°C (32°F to 131°F) |
| Connector Type | Standard 24-pin Amphenol GPIB connectors |
National Instruments GPIB-120A Options:
- GPIB-120A - Single Rack-Mount Kit - Single Rack-Mount Kit for GPIB-120A
- GPIB-120A - Dual Rack-Mount Kit - Dual Rack-Mount Kit for GPIB-120A
- GPIB-120A - Type X1 (1 m) - Type X1 single-shielded GPIB cable, 1 m
- GPIB-120A - Type X1 (2 m) - Type X1 single-shielded GPIB cable, 2 m
- GPIB-120A - Type X1 (4 m) - Type X1 single-shielded GPIB cable, 4 m
- GPIB-120A - Type X2 (1 m) - Type X2 double-shielded GPIB cable, 1 m
- GPIB-120A - Type X2 (2 m) - Type X2 double-shielded GPIB cable, 2 m
- GPIB-120A - Type X2 (4 m) - Type X2 double-shielded GPIB cable, 4 m
| Model | GPIB-120A |
|---|
The National Instruments GPIB-120A is a GPIB expander / isolator. The IEEE 488.1 standard prescribes a maximum of 15 electrical device interface loads in a GPI system. The National Instruments GPIB-120A increases the maximum number of GPIB system devices from 15 to 28. The GPIB-120A is also useful in test and measurement systems because it provides an electrically isolated interface to one or more devices. The GPIB-120A is software transparent; you do not need to rewrite your application software.
Features of the NI GPIB-120A include:
- Expands the number of GPIB devices to 28
- Bidirectional expansion - Controllers, Talkers, and Listeners can exist on either side of the expansion
- 400 Vrms electrical isolation between GPIB systems for 1 minute
- Software transpa €“ no software modifications required
- Signal buffering extends the maximum GPIB cable limit to 40 m (device load every 2 m of bus cable)
- Built-in 120 or 240 VAC power supply
- Meets FCC Class A electromagnetic noise emission requirements
- UL listed
