Agilent Technologies 1100 Series Reference Manual page 280

8 Theory of Operation
• outputs are open collector type, inputs/outputs (wired-or technique).
Table 47
1
2
3
4
5
Table 47
6
7
8
9
RS-232C
The RS-232C connector is used to control the instrument from a computer through RS-
232C connection, using the appropriate software. This connector can be activated by
the configuration switch module next to the GPIB connector.
The RS-232C is designed as DCE (Data Communication Equipment) with a 9- pin male
SUB-D type connector. The pins are defined as follows :
280 1100 Series FD Reference Manual
Remote Signal Distribution
Pin Signal
DGND
PREPARE
START
SHUT DOWN
Remote Signal Distribution, continued
Pin Signal
POWER ON
READY
STOP
START REQUEST
Description
Digital ground
(L) Request to prepare for analysis (for example, calibration,
detector lamp on). Receiver is any module performing pre-
analysis activities.
(L) Request to start run / timetable. Receiver is any module
performing run-time controlled activities.
(L) System has serious problem (for example, leak: stops
pump). Receiver is any module capable to reduce safety risk.
Not used
Description
(H) All modules connected to system are switched on.
Receiver is any module relying on operation of others.
(H) System is ready for next analysis. Receiver is any sequence
controller.
(L) Request to reach system ready state as soon as possible
(for example, stop run, abort or finish and stop injection).
Receiver is any module performing run-time controlled
activities.
(L) Request to start injection cycle (for example, by start key
on any module). Receiver is the autosampler.