1290 Infinity II High-Speed Pumps User Manual 256
11 Hardware Information
Interfaces
Remote (ERI)
The ERI (Enhanced Remote Interface) connector may be used in combination
with other analytical instruments from Agilent Technologies if you want to use
features as common shut down, prepare, and so on.
It allows easy connection between single instruments or systems to ensure
coordinated analysis with simple coupling requirements.
The subminiature D connector is used. The module provides one remote
connector which is inputs/outputs (wired- or technique).
To provide maximum safety within a distributed analysis system, one line is
dedicated to SHUT DOWN the system’s critical parts in case any module detects
a serious problem. To detect whether all participating modules are switched on
or properly powered, one line is defined to summarize the POWER ON state of all
connected modules. Control of analysis is maintained by signal readiness READY
for next analysis, followed by START of run and optional STOP of run triggered on
the respective lines. In addition PREPARE and START REQUEST may be issued.
The signal levels are defined as:
• standard TTL levels (0 V is logic true, + 5.0 V is false),
• fan-out is 10,
• 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" 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).
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