Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 442)

App.C-5
IM 11B08A01-01E
Contact operation: Open/Close
Contact
Annunciator Output
Between NC and
COM terminals
Between NO and
COM terminals
State 1 Open Close
State 2 Close Open
Power supply: OFF Open Close
4.2.3 Analog Output (Option, Up to 4 cards)
Number of outputs:
8 per card, maximum of 32
Signal type: 4 to 20 mA DC
Isolation: Channel isolation, system isolation
(selectable)
Load: 300 Ω or less
Output Types:
Analysis results (analog hold output)/
Chromatogram output
The maximum number of outputs
is 32 analog hold outputs, and 8
chromatogram outputs even in multi-
analog output card.
Note: The analog hold output cannot coexist with GCCU
communication (but the chromatogram output can
coexist with GCCU communication).
Output range: Any setting is possible within the
measuring range. Auto gain can be set
for chromatogram output.
4.2.4 Analog Input (Option, Up to 4 cards)
Number of inputs: 4 per card, maximum of 16
Signal types: 1 to 5 V DC, 4 to 20 mA DC
Isolation: Channel isolation
Accuracy: ±0.5% of full scale (–10 to 50°C)
Input types: Analysis results (e.g. other
analyzers), temperature (e.g. ambient
temperature), pressure, etc.
Function: The following values can be output
by Modbus protocol in the DCS
communication after computing input
values.
Average value:
The one-second average of analog
values measured at every 200 msec
and fi ltered by a predetermined
constant
Current value:
The value at the time set in a cycle
time
External I/O Cutoff Output:
Number of outputs: 1
Function: Monitoring the purge air pressure
in the electronics section, applying
power (24 V DC) to the signal
interrupter when the state is normal.
Signal interrupter (Rack-mounted type:
K9806AE):
FM-X, ATEX, IECEx, TIIS:
Additionally required. Signal is
interrupted by power supply OFF
signals from the external I/O cutoff
output.
FM-Y: Not required
Note: For installation in hazardous area, an explosionproof
structure authenticated by a relevant certifi ed body
shall be prepared by customer.
The same number unit of the signal interrupter as
input card is required.
4.2.5 Contact Output (Option, Up to 4 cards)
Number of contacts: 5 per card, maximum of 20
Function: The following settings are possible at
each contact point.
Stream sequence:
Outputs when the specifi ed stream
sequence is operated.
Stream: Outputs when the specifi ed stream is
operated.
Operation mode:
Outputs when the specifi ed operation
mode is operated.
Alarm:
System alarm:
Outputs when the system alarm
occurs.
Composition Alarm:
Outputs when the concentration
alarm or the retention time alarm
occurs.
Timing: Outputs at the time to be set.
Calibration/Validation:
Outputs when the specifi ed
calibration or validation is operated.
Stream valve selection:
Output for the external sampling
equipment, up to 31.
Stream identifying:
Output for the analog hold output, up
to 5 points per 1 GCM (5 bits, up to 31
streams)
Contact specifi cations:
SSR or Relay contact output, c-contact
(NO, NC, COM)
Contact rating:
SSR contact output:
100 to 240 V AC, max. 2 A (Load),
Relay contact output:
24 V AC, max. 2A (Load)
Contact operation: ON/OFF operation
Contact state: Selectable from Open or Close on
operation (Open when power supply is
turned off.)
External I/O Cutoff Output:
Number of outputs: 1
Function: Monitoring the purge air pressure
in the electronics section, applying
power (24 V DC) to the signal
interrupter when the state is normal.
Signal interrupter (Rack-mounted type, AC:
K9806AN, DC:K9806AJ):
FM-X, ATEX, IECEx, TIIS:
Additionally required. Signal is
interrupted by power supply OFF
signals from the external I/O cutoff
output.
2nd Edition : May 11, 2012-00
App.C