YOKOGAWA VigilantPlant mR20000 Operation Manual page 15

IM 04P02B01-02E
Wiring Procedure
A terminal cover is screwed in place on the
measuring input terminal block on the rear panel.
A label indicating the terminal arrangement is
affixed to the cover.
1.
Turn OFF the recorder and remove the
terminal cover.
2.
Connect the signal wires to the terminals.
Note
Input signal wires of diameter less than or equal to 0.3 mm may not be secured firmly for
clamped terminals (/H2). Fold over the conducting section of the wire, for example, to make
sure that the wire is securely connected to the clamped terminal.
3.
Replace the terminal cover and fasten it with screws.
The proper torque for tightening the screws is 0.6 N-m.
Pen Model
b +/A
Channel 1
Channel 2
Channel 3
Channel 4
Screw input terminal
Dot Model
b +/A
Channel 1
Channel 2
Channel 3
Channel 2
Channel 4
Channel 4
Channel 5
Channel 6
Channel 6
Screw input terminal
Measuring Input Wiring
Thermocouple input
b –/B
Extension leadwire
DC voltage input, 1-5V input,
and ON/OFF input
b –/B +/A
–
DC voltage, 1-5V, ON/OFF
Note
RTD input terminals A and B on the dot model are isolated on each channel. Terminal b is
shorted internally across all channels. However, for 3 legs isolated RTDs (/N2 option), input b
is also isolated for each channel.
+/A
Channel 2
b
Channel 4
Clamped input terminal
(/H2 option)
+A +A
b b
Channel 1
Channel 3
Channel 5
Clamped input terminal
(/H2 option)
Resistance temperature detector input
+/A
Leadwire resistance:
10 Ω max./wire. The resistance of the three
wires should be equal.
DC current input
Shunt resistor
Example: For a 4 to 20 mA input,
a shunt resistor of 250 Ω ± 0.1%
can be used to convert to 1-5V input.
+
Installing/Wiring the Recorder
Measuring input
terminal block
Terminal cover
attachment screws
+/A
Channel 1
b
Channel 3
Channel location on the input terminals
Channel Channel
Channel 13 to 18 Channel
1 to 6
7 to 12 19 to 24
b –/B +/A
b
B
A
b –/B +/A
– +
DC current
15