5.
READING DATA FROM THE 2512 OVER THE IEC INTERFACE
The digital interface
of
the 2512 is designed according
to
the standard IEC 625-1 "Interface
for
Programmable Measuring Apparatus Byte-Serial Bit parallel". Since the only significant differ-
ence between this and the IEEE Standard 488-1978/ANSI MC1.1-1975 is the type
of
connector
· used, compatiblity with these standards is only a question
of
which connecting cable is used.
Connection
of
the 2512 to an IEC 625-1 interface bus system is made from the INTERFACE
BUS connector on the rear panel
of
the instrument using B & K cable AO 0194. Connection to
an
IEEE/ANSI interface bus system is made from the same connector using cable AO 0194
and the adaptor AO 0195. Connection
to
an
earlier B & K instrument fitted with a female, slide-
lock connector is made using cable AO 0184. For further details
of
instrument
interconnections, refer to the Bruel and Kjrer publication "INTERFACING
BROEL
&
KJJER
INSTRUMENTS".
It is important to note that although the 2512 interface is designed according to the IEC
standard, absolute compatibility with IEC
or
IEEE/ ANSI interfaces designed by other manufac-
turers cannot be unconditionally guaranteed, since differences can occur within the limits
of
the specifications. Any problems encountered, however, will be
of
a software rather than a
hardware nature. Where compatiblity is in doubt, contact our local representative
for
details.
5.1.
IEC FUNTIONS IMPLEMENTED
The interface of the 2512 is primarily designed
to
output data to a recording device
or
calculator, and implements the following functions. The clauses referred to are the relevant
sections
of
the IEC publication specifying the functions. The equivalent sections in the
IEEE/ ANSI standard are given in parentheses.
Clause
6,
Source Handshake Interface (SH) Function, (Section 2.3.),
SH
1 - Complete Compatability
Clause
7,
Acceptor Handshake Interface (AH) Function, (Section 2.4.),
AH
1 - Complete Compatibility
Clause
8,
Talker Interface (T) Function, (Section 2.5.)
T3 - Basic Talker - Talk Only
For further details
of
the above functions, refer
to
the relevant section
of
the IEC publication
or
the IEEE/ ANSI Standard.
5.2. INTERFACE BUS
PIN
CONNECTIONS
The pin connections
of
the INTERFACE BUS SOCKET on the rear panel
of
the 2512 are given
in Table
3.
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