Technical information

2.4.8 IBQ01 Controller
The IBQ01 is a DMA controller that interfaces a Q22-bus system to RS–485
industrial control and measurement devices.
Functional Information
Communication protocol Modified SDLC
Supported functions Single multidrop interconnect
250 BITBUS compatible devices
Ordering Information
IBQ01–SF Field-installed kit
Cables User-supplied RS–485 BITBUS standard
Performance
Transfer mode Programmed I/O transfers with interrupt DMA
data transfer
Data transfer rate Up to 2.4 Mbits/second at BITBUS length of 30 m
375 Kbits/second at BITBUS length of 300 m
62.5 Kbits/second at BITBUS length of 13,200 m
Configuration Information
Form factor Quad height
Power requirements +5 Vdc, 5.0 A; +12 Vdc, 0.3 A
Power consumption 28.6 W
Bus loads 4.6 ac; 1.0 dc
Related Documentation
EK–IBQ01–UG DECscan BITBUS Controller User’s Guide
EK–IBQ01–IN DECscan BITBUS Controller Installation
Manual
EK–IBQ01–TM DECscan BITBUS Controller Technical
Manual
EK–JQ52A–TN DECscan BITBUS Controller Software
Installation
Option Specifications 2–69