Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 441)

<Appendix C Standard Specifi cations>
App.C-4
IM 11B08A01-01E
Data to be received:
Operation requests (stream sequence
setting, stream setting, run, stop,
pause, and range change)
External I/O Cutoff Output:
Number of outputs: 1 or 2
Function: Monitoring the purge air pressure
in the electronics section,
applying power (24 V DC) to the
communication converter/the signal
interrupter when the state is normal.
Signal interrupter (Rack-mounted type:
K9806AE):
FM-X, ATEX, IECEx, TIIS:
Additionally required.
RS-422 is outputed 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.
Communication converter (Rack-mounted type:
K9806AS, Desktop type: K9806AT):
RS-422/232C communication
converter with signal interrupter
function.
Signal is interrupted by power supply
OFF signals from the external I/O
cutoff output.
Note: Two units are required for 2 channel communication.
Note: For installation in hazardous area, an explosionproof
structure authenticated by a relevant certifi ed body
shall be prepared by customer.
4.1.3 Connection to GCCU MarkII (GC Computing Unit)
Both Ethernet and Serial communication are
available.
Note: Applicable only to 1GCM
Note: Analog hold output in the analog output function
cannot coexist with the GCCU communication.
(1) Ethernet communication
The same port as analyzer network is used.
Refer to 4.1.1 Connection to Analyzer network.
Communication standard: Ethernet
Protocol: Modbus over TCP
Communication speed: 100Mbps
Note: SHDSL interface (K9802PB) is provided as an
option (1 channel only).
(2) Serial communication (Option)
Channel: 1
Communication standard:
RS-422
Transmission: Full duplex (4-wire system)
Protocol: Modbus
Start-stop (asynchronous) communication:
Start bit 1, Data bits 7, Parity bit 1, Stop
bit 1
Parity check: Even
Communication speed: 9600 bps
Data format: ASCII
Communication control: None
Terminal: Terminal connection (Phoenix terminal)
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
communication converter when the
state is normal.
Communication converter (Rack-mounted type:
K9806AS, Desktop type: K9806AT):
RS-422/232C communication
converter with signal interrupter
function.
Signal is interrupted by power supply
OFF signals from the external I/O
cutoff output.
Note: For installation in hazardous area, an explosionproof
structure authenticated by a relevant certifi ed body
shall be prepared by customer.
4.2 Input/Output
System alarm 1 and Annunciator are provided as
standard contact outputs. Other Input/Output can
be added depending on specifi cations.
Note: Up to 5 optional cards are selectable.
Note: The maximum number of the contact inputs is 32
and outputs is 20, with any combination of contact
input cards, contact output cards, and contact I/O
cards.
4.2.1 Contact Output for System Alarm 1
Number of contact outputs: 1
Function: Starting operation when System alarm
1 occurs.
Contact specifi cation:
Relay contact output, c-contact (NC/
NO/COM)
Contact rating: 30 V DC, 100 mA
Contact operation: Open/Close
Contact
System alarm
Between NC and
COM terminals
Between NO and
COM terminals
On operation Open Close
Off operation Close Open
Power supply: OFF Open Close
4.2.2 Contact Output for Annunciator
Number of contact outputs: 1
Function: Outputting the state of the purge air
pressure in the isothermal oven and
the electronics section (State 1 or
State 2)
State 1: Outputting the states of override
mode ON, power supply of the
analyzer OFF, purging, or insuffi cient
pressure
State 2: Outputting the state after the purge
Contact specifi cation:
Relay contact output, c-contact (NC/
NO/COM)
Contact rating: 30 V DC, 100 mA
2nd Edition : May 11, 2012-00