Yokogawa Low Concentration (ppm) Zirconia Oxygen Analyzer OX400 - Manual (Page 30)

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4. Piping and Wiring>
4-3
IM 11M10B01-01E
MS1
MS2
MS3
MSI1
MSI2
MSICOM
MSCOM
1st flow path
2nd flow path
3rd flow path
OX400 Rear Terminal (M3 screw)
The following terminals are added for the multi-selector “/MS” option.
The customer needs to supply a switching device and carry out the necessary wiring.
Contact output
for switching of
measurement flow
path
Contact output
for measurement
flow path data
Common
Common
Common
PUMP
OFF
mA
G
V
RC2
RC3
RCCOM
RC1
FAIL
DO
Pump ON/OFF
Contact input
(available when suffix code of
with built-in pump “-P” specified)
Secondry output
(0-1/0-5/0-10 V DC)
Power cord (two-pole plug with earthing contact)
Primary output
(4 to 20 mA DC)
+
-
+
-
Alarm
(Oxygen concentration high/low)
Contact output
Error (Fail)
Contact output
Range marker
Contact output
(Note 2) (Note 3)
(Note 1)
Note 1: Use the earthing contact of power cord to ground to earth.
Use the supplied power cord only.
Note 2: Ground the measurement output signal line shield on the receiving side.
The G-terminal is connected to a ground pin. Use this if the line shield cannot be grounded on the receiving side.
Be very careful not to ground the line at two points.
Note 3: The signal output and contact input cable must be no longer than 30 m for CE marking. RS232 cable must be no longer than 3 m.
(NOT using)
Figure 4.3 External Wiring Diagram
4.2.2 Signal Wiring
Table 4.1 shows the signal assignments of terminals on the rear panel. Perform wiring as necessary.
It is recommended to use an insulation sleeve crimp terminal (for M3 screws) for cable termination.
Table 4.1 List of Input and Output Signals
Type of Signal Terminal Marking Description Screw Wiring Limit
Primary output terminal mA + - 4-20 mA current output M3 (Note)
Secondary output terminal V + - 0-1, 0-5, 0-10 V DC voltage output M3 (Note)
Range marker terminal RC1, RC2, RC3,
RCCOM
For auto range recognition
M3
Contact input terminal PUMP OFF For pump remote ON/OFF M3 (Note)
Error contact output terminal FAIL Output in the event of an error (ERR) M3
Alarm contact output terminal DO Output in the event of an oxygen
concentration alarm (ALM7)
M3
Contact output terminal for
multi-selector
MS1, MS2, MS3,
MSCOM
MSI1, MSI2,
MSICOM
For measurement flow path switching
(1 to 3)
For information on flow path under
measurement
M3
(Note) The current or voltage signal output cable length must be no longer than 30 m for CE use.