38
Data transfer to a computer occur via a built-in serial RS-232C interface.
Data transfer to
a
printer may occur via a built-in RS-232.C inregace or via a parallel centronics interbace.
Interface hardware specification for RS-232C interface
cifications of the interface are as follows:
The configuration
is
specified as for data terminal equipment
(DTE).
The baud rate (speed af whish data is changed between an external computer and the instrument) is
selected by the
DL
switches at the rear of the instrument. The following baud rates are available: 150,
400,600, 1200,2400,4800,9600 and 19200. The baud rate
9600
is set bv the manufacturer.
Character format
ts
10 bits with
1
start bit, 8 data bits, 1 stop bit and no parity The fomat cannot
changed.
SR
handshake
is
recommended to use. Handshake
used
is
set
by
the
mandacturer. The
desired alternative
is
selected by a
DTL
switch at the rear of the instmment.
TransmiUreceive pin configuration: pin
2
transmits and pin
3
receives or vise versa. The desired
configuration is selected by the DIL switches at the
rcar
of the instrument. The following'co~t~ration
is set bv the manufacturer: oin
2
transmits and
in
3
receives.
The following signals are connected to the DB-25 connector
at
the rear of the instrument:
RS-232C PORT
BB-25 CONMECTOR
PINNO
SIGNAL
N
*--ee--**----*--om--*----*--*---.--
-
2 TxD or
W
3
RUD
or
TxD
6
D
7
G
20
---v-------m------o*-<-"--ea
2.
TxD,
Transmit Data output (or
BuD,
Receive Data input)
Receive
Data
input (or TxD, Transmit Data output)
Data Set Ready. The input tells Multiskan
EX
that the printer or computer
is
ready
Ready.
BTR
is in the high state when Muitiskac~
EX
is
ready to receive a command
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