Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 209)

IM 11M12D01-01E 11-15
11. Inspection and Maintenance
11.6 Adding the Expansion Power Supply Unit
To connect more than 4 detectors to a 4-channel base averaging converter (AV550G-A-
), the expansion power supply unit is required to be installed as well as addition of
channel card(s) described in Section 11.5, "Adding Channel Cards.". Follow the proce-
dure below to add the expansion power supply unit.
1) Before the procedure, turn off the power to the averaging converter at the external
breaker.
2) Remove the front cover, and position the power switch to "O (OFF)".
3) The power cable to be connected to the expansion power supply unit is fixed inside
the averaging converter with plastic bands (See figure below). Cut a plastic band
nearest to the connector on the end of the power cable with a nipper or relevant tool.
Take care not to damage the cable sheath.
4) Insert the connector of the power cable into the expansion power supply unit. Fix the
expansion power supply unit to the frame of the averaging converter with the 4
screws supplied. Make sure that the connector in the rear of the expansion power
supply unit is seated properly and firmly and the screws are securely tightened.
5) Connect the heater wiring of the added detector to the corresponding heater terminals,
and attach the protection cover.
DANGER
To work safely, turn off the power to the averaging converter at the external breaker and
position the power switch to "O (OFF)" before the work.
After the work, position the power switch to "I (ON)", attach the front cover, and then
apply the power to the averaging converter.
CAUTION
• The expansion power supply unit cannot be added in the 230 VAC version.
Cable for Expansion Power Supply
Expansion Power Supply
F11.11E.eps
Fig. 11.11