Agilent Technologies 1260 Infinity VL User Manual page 184

12
Hardware Information
Interfaces
• input load is 2.2 kOhm against + 5.0 V, and
• output are open collector type, inputs/outputs (wired- or technique).
All common TTL circuits operate with a 5 V power supply. A TTL signal is defined as "low"
N O T E
or L when between 0 V and 0.8 V and "high" or H when between 2.0 V and 5.0 V (with
respect to the ground terminal).
Table 12
Pin
1
2
3
4
5
6
7
8
9
Special Interfaces
Some modules have module specific interfaces/connectors. They are described
in the module documentation.
184
Remote Signal Distribution
Signal Description
DGND Digital ground
PREPARE (L) Request to prepare for analysis (for example, calibration, detector
lamp on). Receiver is any module performing pre-analysis activities.
START (L) Request to start run / timetable. Receiver is any module
performing run-time controlled activities.
SHUT DOWN (L) System has serious problem (for example, leak: stops pump).
Receiver is any module capable to reduce safety risk.
Not used
POWER ON (H) All modules connected to system are switched on. Receiver is any
module relying on operation of others.
READY (H) System is ready for next analysis. Receiver is any sequence
controller.
STOP (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.
START REQUEST (L) Request to start injection cycle (for example, by start key on any
module). Receiver is the autosampler.
1260 Infinity QuatPump VL User Manual