Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 92)

IM 11M12D01-01E 5-12
5.2.7 Wiring for Individual and Average Concentration Analog Outputs
For the signal wiring to analog outputs, use shielded PVC insulated PVC sheathed
control cables. The number of cores is determined by the number of outputs. If a cable
gland is not installed on the wiring hole of the averaging converter, use a wire with an
outside diameter of 17 mm or smaller. If installed, use a wire with an outside diameter
of 6 to 12 mm. Like the signal wiring to detectors, the shields should be connected to
cable shield ground terminals on the case of the averaging converter.
The load resistance from the averaging converter, including the wiring resistance, should
be 550
Ω
or less.
1
2
3
4
5
6
7 7 7 7
8 8 8 8
Receiver
Control Card
CH1 CH2 CH4
Averaging Converter
Shield
Shield
Ave-a
Ave-b
Ave-c
Channel Card
Averaged Analog Output
Individual Analog output
CH3
ϩ
Ϫ
ϩ
Ϫ
ϩ
Ϫ
ϩ
Ϫ
ϩ
Ϫ
ϩ
Ϫ
ϩ
Ϫ
ϩ
Ϫ
Figure 5.11 Wiring for Individual and Average Concentration Analog Outputs
5.2.8 Wiring for Solenoid Valve for Automatic Calibration
This wiring is for operating the solenoid valve to switch zero and span calibration gases
during calibration in the automatic calibration system and for operating the solenoid
valve installed on the calibration gas line to the detector of each channel. The contact
output for solenoid valve is also used for operating the solenoid valve on the blowback
piping. For the wiring and piping of the system, refer to Section 5.3, Wiring and Piping
Examples.
Use shielded PVC insulated PVC sheathed control cables for the wiring for solenoid
valves. The shields should be connected to cable shield ground terminals on the case of
the averaging converter.
If a cable gland is not installed on the wiring hole of the averaging converter, use a wire
with an outside diameter of 17 mm or smaller. If installed, use a wire with an outside
diameter of 6 to 12 mm. Like the signal wiring to detectors, the shields should be
connected to cable shield ground terminals on the case of the averaging converter.
All contact outputs for solenoid valves are voltage free, dry contacts (mechanical relay
contact outputs). The contacts are open under normal conditions (when deenergized).
The contact rating is 250 VAC, 1A or 30 VDC, 1A.
If optional 24 V outputs are specified for solenoid valves (Option Code "/24"), no
external power supply for solenoid valves is required. The solenoid valves are powered
from the AV550G Averaging Converter. The maximum current that can be supplied to
the solenoid valve is 50 mA. Use solenoid valves that consume not more than 1.2 W to
operate.