Connection Procedures
A
B
b
b
Voltage input
CH1...................................................CH20.
Thermocouple input
Resistance temperature detector input Current input
+
-
b
+
-
Compensation wire is
used if it is required.
+
-
DC voltage input
+
-
+
-
Orange with red dotted line : 1
Orange with black dotted line : 2
Grey with red dotted line : 3
Grey with black dotted line : 4
White with red dotted line : 1
White with black dotted line : 2
Yellow with red dotted line : 3
Yellow with black dotted line : 4
Pink with red dotted line : Trigger input/
external sampling input
Shielded
GND
Logic/pulse
input
Alarm output
< Signal assignment >
Pink with black dotted line
Connecting the AC Adapter
Connect the DC output of the AC adapter to the
connector indicated as "DC LINE" on the GL840.
Connecting the Grounding Cable
Use a flathead screwdriver to push the button above
the GND terminal while connecting the grounding
cable to the GL840. Connect the other end of the
cable to ground.
Lead wire resistance should be
10 Ω or less per wire, three
wires need to be same length.
Shunt resister
Ex: The current is converted to the voltage in the
shunt register.
For 4 to 20mA current input, installing 250 ohms
(0.1%) resister for converting 1 to 5V.
Note: 250 Ω shunt register is the option B-551.
Making Connections to the Analog Input Terminals
CAUTION: Connect wires to the specified channel, the channel number is shown on top of the terminal block.
Making Connections to the External Input/Output Terminals
* The B-513 input/output cable for GL (sold separately) is required for connecting input/output signals.
(For logic/pulse input, alarm output, trigger input, external sampling pulse input)
3
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