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Emerson Process Management GmbH & Co. OHG 1-11
X-STREAM X2
Instruction Manual
HASX2E-IM-HS
02/2012
1.3 Interfaces
1.3.3.3 Digital Outputs
Digital outputs can be used for various pur-
poses:
• Issuing concentration alarms: Process
control systems can detect when limits
are exceeded and trigger appropriate
actions.
• Switching external components: For ex-
ample, during automatic calibration, the
necessary valves can be activated directly
by the analyzer.
Digital outputs can be integrated into the units
in groups of 9 or 18 (
1.4, page 1-12).
The relay contacts, which can take a maxi-
mum load of 30 V at 1 A and 30 W, can be
operated as normally open (NO) or normally
closed (NC).
1.3.3.4 Digital Inputs
Digital inputs can:
• trigger calibration procedures, for example
by a process control system
• remotely control valves and the optional
sample gas pump (in concert with correctly
congured digital outputs).
Digital inputs can be integrated into the units
in groups of 7 or 14 (
1.4, page 1-12).
Electrical details
LOW: U
in
≤ 1,5 V
HI2GC: U
in
≥ 4,5 V
Input impedence: 57,5 kΩ
Common ground for all outputs (“IN-GND”)
The inputs are protected against excess
voltages of up to approx. 40 V. An open (not
wired) input has LOW potential.
1
Technical Description