Description
IOtech IEZ11-A2 SCSI 488/D Bus Controller IEEE 488 GPIB 105-250V Rev 4.5
The IOtech IEZ11-A2 is a standalone SCSI-to-IEEE 488 (GPIB) bus controller that bridges a SCSI host bus with an IEEE 488 instrument bus, allowing a computer with a SCSI interface to control IEEE 488-compatible test and measurement instruments. It connects to the host computer via SCSI and presents a transparent interface to the GPIB instrument bus, eliminating the need for a dedicated GPIB interface card inside the host. The unit is housed in a compact 1U desktop/rack-mountable enclosure and operates from a universal AC input.
Specifications & What's Included
- Manufacturer: IOtech, Inc.
- Model / Part Number: IEZ11-A2
- Secondary Model: SCSI488/X
- Hardware Revision: Rev 4.5
- Bus Interface: SCSI (host side) to IEEE 488 / GPIB (instrument side)
- SCSI Connectors: 2 × 50-pin Centronics SCSI connectors (rear panel)
- IEEE 488 / GPIB Connector: 1 × standard 24-pin IEEE 488 connector (rear panel)
- SCSI Address: User-selectable via front-panel DIP switch (positions 0–7 visible)
- Input Voltage: 105–125V / 210–250V AC (universal, switch-selectable)
- Input Current: 0.25A @ 105–125V / 0.125A @ 210–250V
- Frequency: 50–60 Hz
- Power: 20 VA max
- Power Connection: IEC C14 inlet (rear panel)
- Front Panel Indicators: TALK, LISTEN, SRQ (IEEE 488 bus status); SEND, RECEIVE, ERROR, POWER (SCSI bus status)
- Certifications: UL Listed LR 88899; FTZ C-037/90; SCSI488/X (LA-44)
- Country of Manufacture: United States
- Form Factor: 1U desktop / rackmount chassis
- Included: Unit only — no cables included
Applications
The IEZ11-A2 was designed for laboratory and test environments where a host workstation or computer equipped with a SCSI interface needed to control one or more IEEE 488 (GPIB) instruments — such as oscilloscopes, signal generators, power supplies, multimeters, and spectrum analyzers — without installing an internal GPIB card. This type of external bus controller was particularly common in the late 1980s and early 1990s, when SCSI was a standard high-speed peripheral interface on engineering workstations (Sun, HP, Apollo, NeXT) and minicomputers that lacked ISA or PC-bus slots for conventional GPIB cards. The SCSI 488/D approach let engineers add GPIB capability to any SCSI-equipped host and daisy-chain multiple instruments on the IEEE 488 bus. The IEZ11-A2 is still sought after today for legacy test-bench automation setups and vintage instrument control applications where SCSI-based hosts remain in service.
This IOtech IEZ11-A2 SCSI 488/D Bus Controller has been inspected and appears to be in good used condition. It was pulled from a working environment where it was previously in service. The unit shows normal cosmetic wear consistent with prior use — the black enclosure has minor scuffs and surface marks, and the front panel LEDs and labeling are intact and legible. The rear connectors, including the IEC power inlet, IEEE 488 GPIB port, and dual 50-pin SCSI Centronics connectors, all appear clean and undamaged. The front-panel SCSI address DIP switches are present and accessible. The unit has not been powered up or bench-tested at our facility. Please review our photos and contact us with any questions before purchasing.
Warranty Information
Additional Information
Brand: |
IOtech |
Model: |
IEZ11-A2 |
MPN: |
IEZ11-A2 |
Secondary Model: |
SCSI488/X |
Type: |
SCSI to IEEE 488 / GPIB Bus Controller |
SKU: |
35894 |
Revision: |
Rev 4.5 |
Interface Type: |
SCSI and IEEE 488 (GPIB) |
Number of SCSI Ports: |
2 (dual 50-pin Centronics SCSI connectors) |
IEEE 488 Connector: |
1 x IEEE 488 / GPIB (24-pin) |
Power Requirements: |
105-125V / 210-250V AC, 50-60Hz, 0.25/0.125A, 20VA max |
SCSI Address: |
User-selectable via front DIP switch |
Front Panel Indicators: |
TALK, LISTEN, SRQ (IEEE 488); SEND, RECEIVE, ERROR, POWER (SCSI) |
Form Factor: |
1U Rackmount / Desktop |
Certifications: |
UL Listed (LR 88899), FTZ C-037/90, SCSI488/X (LA-44) |
Country/Region of Manufacture: |
United States |
Seller Notes: |
Unit only; no cables included. SCSI address selectable via front DIP switch. |
Condition Notes: |
This IOtech IEZ11-A2 SCSI 488/D Bus Controller is in good used condition, pulled from a working environment. Connectors and front panel LEDs appear intact. Not powered or tested at our facility. Please contact us with any questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
