Description
The GPIB-120B is a GPIB Bus Expander/Isolator designed to enhance the functionality and compatibility of your GPIB system. This device supports a wide range of part numbers including 779651-01, 779651-04, 779651-06, and 779651-07, making it a versatile addition to any setup.
It adheres to the IEEE 488.1 and IEEE 488.2 standards, ensuring seamless integration and compatibility with existing systems. The GPIB-120B allows for the connection of up to 28 devices on the GPIB bus, significantly expanding the potential of your network. Each unit supports 14 additional devices, allowing for extensive network expansion without sacrificing performance.
One of the key features of the GPIB-120B is its ability to provide isolation voltage up to 2,500 VDC (non-continuous), offering protection against voltage spikes and enhancing the reliability of your GPIB network. It also boasts bi-directional expansion, supporting talkers, listeners, and controllers on either side of the bus. This flexibility ensures that the GPIB-120B can meet a wide range of application requirements.
The device excels in noise elimination, effectively reducing induced common-mode and ground loop noise. This feature is crucial for maintaining the integrity of data transfer across the network. The GPIB-120B operates transparently and offers two data transfer modes: buffered mode and unbuffered mode (default). This gives users the ability to choose the mode that best suits their specific needs.
Additionally, the GPIB-120B is equipped with a configuration switch located on the back of the unit, allowing for easy configuration changes as required. It supports a range of data lines, including DIO1, DIO2, DIO3, DIO4, DIO5, DIO6, DIO7, DIO8, and features three hardware handshake lines, enhancing its functionality and versatility.
In conclusion, the GPIB-120B is an essential device for anyone looking to expand
| Feature | Description |
|---|---|
| Part Numbers | 779651-01, 779651-04, 779651-06, 779651-07 |
| Category | GPIB |
| Model | GPIB-120B |
| Compatibility | IEEE 488.1 and IEEE 488.2 standards |
| Function | GPIB Bus Expander/Isolator |
| Maximum Devices Supported | 28 devices on the GPIB bus |
| Isolation Voltage | Up to 2,500 VDC (non-continuous) |
| Bi-directional Expansion | Yes, supports talkers, listeners, and controllers on either side |
| Noise Elimination | Induced common-mode and ground loop noise |
| Additional Devices Supported per Unit | 14 additional devices |
| Operation Mode | Operates transparently |
| Data Transfer Modes | Buffered mode, Unbuffered mode (default) |
| Configuration Switch | Yes, on the back of the unit |
| Data Lines | DIO1, DIO2, DIO3, DIO4, DIO5, DIO6, DIO7, DIO8 |
| Hardware Handshake Lines | Three lines |
Question 1: What standards does the GPIB-120B adhere to?
Answer 1: IEEE 488.1 and IEEE 488.2
Question 2: How many devices can the GPIB-120B support?
Answer 2: Up to 28 devices
Question 3: What is the isolation voltage of the GPIB-120B?
Answer 3: Up to 2,500 VDC (non-continuous)
Question 4: Does the GPIB-120B support bi-directional expansion?
Answer 4: Yes, it supports bi-directional expansion.
Question 5: Can the GPIB-120B operate in buffered mode?
Answer 5: Yes, it has buffered and unbuffered modes.




