Connection Procedures - GRAPHTEC GL840 Quick Start Manual

Connecting the AC Adapter
Connect the DC output of the AC adapter to the
connector indicated as "DC LINE" on the GL840.
Making Connections to the Analog Input Terminals
CH1...................................................CH20.
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

Connection Procedures

Resistance temperature detector input
+
-
b
Lead wire resistance should be
10 Ω or less per wire, three
wires need to be same length.
< Signal assignment >
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.
Voltage input
+
DC voltage input
-
A
+
B
-
b
b
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.
Orange with red dotted line
Orange with black dotted line : 2
Grey with red dotted line
Grey with black dotted line
White with red dotted line
White with black dotted line
Yellow with red dotted line
Yellow with black dotted line : 4
Pink with red dotted line
Pink with black dotted line
Shielded
Thermocouple input
+
-
Compensation wire is
used if it is required.
Current input
+
-
: 1
Logic/pulse
: 3
input
: 4
: 1
: 2
Alarm output
: 3
: Trigger input/
external sampling input
GND