Technical information

2.4.9 IEQ11 Controller
The IEQ11 option is a DMA controller that interfaces a Q22-bus system to
two independent instrument buses (IEC/IEEE).
Functional Information
Supported interfaces IEEE–488–1978
IEC 625–1
Supported interface functions Automatic source handshake
Automatic acceptor handshake
Talker and extended talker (includes serial poll)
Listener and extended listener
Service request
Remote local
Parallel poll
Device clear/Device trigger
Controller
Ordering Information
IEQ11–SF Field-installed kit for IEC connection
Performance
Transfer mode Programmed I/O transfers with interrupt DMA
data transfers
Data transfer rate 150 Kbytes/s during a DMA block transfer
Configuration Information
Form factor Quad height
Power requirements +5 Vdc, 3.5 A (typ); +12 Vdc, 0.0 A
Power consumption 17.5 W
Bus loads 2.0 A ac; 1.0 A dc
Module connectors Standard 24-pin IEEE 488 connector (IEQAA–AC)
Standard 25-pin IEC 625 connector (IEQ11–AD)
Related Documentation
EK–IEUQ1–UG IEU11–A/IEQ11–A User’s Guide
2–70 VAX 4000 Model 200 Technical Information