Contact Signal Line Contact Signal Line
1
DIO
1
14
DIO5
2
DIO2
15
D1O
6
3
DIO3
16
DIO 7
4
DIO4
17
DIO8
5 REN 18
Gnd (REN)
6 EOI 19
Gnd (EOI)
7
DAV
20
Gnd
(DAV)
8
NRFD
21
Gnd (NRFD)
9
NDAC
22
Gnd (NDAC)
10
IFC
23
Gnd (IFC)
11
SRO 24
Gnd (SRO)
12
ATN
25
Gnd
(ATN)
13 Shield
Recommended Cable:
24
core,
12
of
which
are
twisted
pairs, and one shield
Max. Cable Length Between Instruments: 4 m
Max.
Total
Cable Length:
20
m
800
177/ 1
Table
3.
Interface Connector Contact Assignments
5.3. CONNECTING EXTERNAL DEVICES TO THE 2512 VIA THE IEC INTERFACE BUS
It is possible to connect a variety of other instruments to one
or
a number
of
2512s via the in-
terface bus. As the 2512 is only a talker, the instruments most usually connected to the 2512
will be recorders such as the Alpanumeric Printer Type 2312
or
the Digital Cassette Recorder
Type
7400.
This will be referred to in this chapter as the manual mode. If an external controller,
e.g. a desk-top calculator or mini-computer is used, the instruments will normally be ad-
dressed individually by the controller. This will be referred to as the addressable mode. The
procedures for using the interface bus are described in the following sections.
5.3.1. Manual Mode
Connecting a Number of Instruments to a Single 2512 via the IEC Interface Bus
44
Fig.5.1. shows an arrangement for printing out measurements on an Alphnumeric Printer Type
2312 for immediate investigation and for recording onto a cassette using the Digital Cassette
Recorder Type 7
400
for further analysis at a later date. The procedure is as follows:
1.
Connect the instruments as shown in Fig.5.1. using the interface cable AO 0194 if the
instrument is a newer model,
or
AO 0184 if the instrument is
an
earlier model (prior to
serial number 920925).
·:·
1·'.
c::;:mo
I
:
--.
-·-
- •
..::
\.
;~--
• -
000
-
Human-Response
Vibr
ation Meter
Type 2512
AO
0194
or
AO
0184 (Earlier models)
Alph
anumeric Printer
Type 2312
Digital Cassette Recorder
Type 7400
8 1
0433
Fig.
5.1.
Using the Alphanumeric Printer Type 2312 and the Digital Cas-
sette Recorder Type
7400
to record data from a 2512
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