Metrohm 711 Liquino - Manual (Page 16)

2.5 Connections
711 Liquino, Instructions for use 10
2.5.1 Remote connections
The remote control of instruments within a Metrohm automated system can
(apart from data communication via RS232 interfaces) be carried out in a
simple manner with the help of parallel-switched signal leads, the remote
lines (or I/O lines). Signals can be set statically or transmitted as a signal
pulse (usually approx. 200 ms duration); see SCAN and CONTROL com-
mands, (page 91ff). The signal level is +5 volt (TTL-level) in each case.
The functions which can be used for remote control or monitoring tasks
each occupy a particular remote lead. The remote socket of a Metrohm in-
strument has input leads (Input0…7, for the control of certain functions, e.g.
START or STOP) and output leads (Output0…8, to display instrument condi-
tions, e.g. 'ready' or 'End of Determination').
The remote connection is normally a 25-pin socket. Different connection ca-
bles are available for different types of instrument. The suitable remote cable
is listed in the ‘Instructions for use’ of the corresponding instrument. Special
connection cables can also be made according to the customers’ particular
requirements.
Remote lead occupancy for 711 Liquino:
Remote lead Pin Function
Input 0 21 START
Input 1 9 STOP
Input 2 22 HOLD / CONTINUE
Input 3 10 External ready
Input 4 23 Sample Changer ready
Input 5 11 not used
Input 6 24 PIP continue
Input 7 12 not used
Output 0 5 Ready
Output 1 18 Upper limit
Output 2 4 Lower limit
Output 3 17 EOD (End of Determination)
Output 4 3 Activate 1
Output 5 16 Activate 2
Output 6 1 External start
Output 7 2 Start Sample Changer
Output leads 8…13 cannot be used.
In the SEQ mode remote leads Input3…7 and Output4…7 can be freely
used with the commands SCAN and CONTROL (see page 91ff).