Yokogawa DA100 - Manual (Page 28)

IM DA100-01E 2-7
2
Installation and Wiring
2.4 Connecting the Interface Cables
This section describes the connection between the communication module of the data acquisition
unit DA100 and a personal computer using a communication interface.
GP-IB
The GP-IB connector of the GP-IB communication module is a 24-pin connector of IEEE St’d
488-1978. Only use cables that conform to IEEE St’d 488-1978 as a communication cable.
Connection Procedure
Connect the cable as shown in the figure below.
GP-IB module
Ferrite core
Personal
computer
DA100
Ferrite core
Function grounding terminal
CAUTION
When (dis)connecting the GP-IB cable, turn OFF the power of both the
personal computer and the data acquisition unit DA100. If the power is not
turned OFF, malfunctions may occur and the internal circuitry may be
damaged.
• When connecting the cable, take note of the following.
· Tighten the screws which fasten the GP-IB connector firmly.
· To eliminate noise, we recommend to apply two ferrite cores (as shown above) at both ends of the
cable (e.g. ZCAT 3035-1330 from TDK). Use a shielded interface cable and ground equipment
together at one point.
· Although more than one equipment can be connected to a GP-IB system, only one
communication module can be connected to a single personal computer. To prevent trouble when
using the accessory software, we recommend not to connect any other equipment with this
DA100 system.
· In case several equipment are connected (although this situation is not recommended), make sure
that to each a different address is assigned.
· Use only cables of 2m or less for connections between equipment.
How to Assign an Address
The address can be assigned easily by turning the rotary dipswitch as shown in the figure below.
Any address can be set from “0” to “15”; the characters “A” to “F” on the dipswitch correspond to
the address “10” to “15” respectively.
0 12
3
4
5
678
9
F E
D
C
B A
0 12 3 4 5 678 9
F E D C B A
Set-up of the Personal Computer (when using the DAQ software 32 accessory)
1 A GP-IB board should be installed in the personal computer. Only the following GP-IB boards
(made by National Instruments Co.) are supported.
AT-GPIB
2 Install the accessory software for the GP-IB board (from National Instruments). The device
driver must be registered as CONFIG.SYS [device=(drive:directory)GPIB.COM].