Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 130)

<2. Installation, Piping, and Wiring>
2-13
IM 11B08A01-01E
CAUTION
• Lay the signal wiring and electrical wiring in separate conduit pipes or ducts.
• Use independent grounding with a grounding resistance of 100 ohms or less.
2.3.1 Types of Wiring and Locations
The following types of wiring are required for the GC8000.
The wiring required varies with the specifi cations.
(A) Electric circuit and heater power
(B) Heater
power
(C) Contact output for system alarm 1
(D) Contact output for annunciator
(E) Analog input (4 to 20 mA)
(F) Contact input (Operation start/stop, mode-selection request, etc.)
(G) Contact output
(H) Communication wiring (RS-422 and analyzer bus)
(J) Analog output (4 to 20 mA), Analog hold output
(K) Grounding
(L) External I/O cutoff output (Power cutoff signal)
(M) Ethernet (twisted-pair cable)
(N) Ethernet
(optic fi ber cable)
B A
K
CD EFGH
JLMN
K
ABCDEFGH
JLMN
Protection system A
Control unit
Protection system B *
* Protection system B is equipped in some specifications.
With protection system Without protection system
Figure 2.11 Cable connection locations
2nd Edition : May 11, 2012-00
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