Connection Procedures - GRAPHTEC GL840 Quick Start Up Manual

Connect the AC Adapter
Connect the DC output of the AC adapter to the
connector marked as "DC LINE" on the GL840.
CH1...................................................CH20.
CAUTION: Connect wires to the specified channel, the channel number is shown on top of the terminal block.
Connect the External Input/Output Cable
* 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 and external sampling pulse input)
3

Connection Procedures

Connect to the Analog Input Terminals
Resistance temperature detector input
+
-
b
< Signal assignment >
Connect the Grounding Cable
Use a flathead screwdriver to push the button above
the GND terminal while connecting the ground
cable to the GL840. Connect the other end of the
cable to ground.
Voltage input
+
DC voltage input
-
A
+
B
-
b
b
Lead wire resistance should be
10 or less per wire, three
wires need to be same length.
Thermocouple input
Compensation wire is
used if it is required.
Current input
+
-
Shunt resister
Ex: Current signal is converted to voltage using a
shunt register.
For 4 to 20mA current input, install the 250ohms
(0.1%)shunt resister to convert the signal to 1 to
5V.Note: Graphtec offers B-551 250ohm.
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
Pink with black dotted line
Shielded
+
-
Logic/pulse
input
Alarm output
GND