Measurement Computing Isolator488 - Manual (Page 7)

Section 1 Introduction
1.1
Introduction
1.1 GENERAL DESCRIPTION
The Isolator488 increases the number of IEEE instruments and devices allowable
on the bus from 15, including the controller, to 28 while also providing optical
isolation between the system controller and devices on the isolated bus. Since the
Isolator488 does not occupy a bus address, its operation is entirely transparent to the
IEEE controller. The IEEE standard defines 31 valid primary bus addresses.
Therefore, no special software or bank switching is necessary to access the additional
devices allowed by the Isolator488. The Isolator488 and has no effect on bus data
transfer rates.
Two IEEE ports are provided. One connects directly to the controller's IEEE bus,
the other to an additional 14 instruments, printers, plotters and specialized peripherals
which may need to be optically isolated from the system controller.
1.2 AVAILABLE ACCESSORIES
Additional accessories that can be ordered for the Isolator488 include:
123-0900 Instruction Manual
CA-7-1 1.5 foot IEEE 488 cable
CA-7-2 6 foot IEEE 488 cable
CA-7-3 6 foot Shielded IEEE 488 cable
CA-7-4 Reverse entry 6 foot IEEE 488 cable
CN-20 Right Angle IEEE 488 adapter, male and female
CN-21 IEEE 488 connector Extender, male and female
CN-22 IEEE 488 multi-tap bus strip, four female
connectors wired in parallel.
CN-23 IEEE 488 panel mount feed-through connector,
male and female