Connecting The Signal Input Cables - GRAPHTEC GL840 User Manual

CHAPTER 2 Checks and Preparation

2.5 Connecting the Signal Input Cables

This section describes how to connect the signal input cables.
During wiring, confirm that the signal's supply source is turned OFF to prevent electrical shocks.
Also, position the GL840 input cable away from any power lines and ground cables.
Terminal Configuration and Signal Types
Terminal assignment of standard terminal and Withstand high-voltage high-precision terminal is common.
CH1
+
-
b
Connection diagram
DC voltage input
Voltage input
Resistance bulb input
The lead wire resistance per line should
be 10Ω or less, and the resistance values
of the three lines should be equal.
+ .....................................High-voltage terminal (terminal for high-voltage input signals)
- ......................................Low-voltage terminal (terminal for low-voltage input signals)
b .....................................Dedicated terminal when connecting resistance bulb
* Resistance bulb input terminals A (+) and B (-) are isolated within each channel. Terminal b is shorted
within all channels.
Input configuration
Measurement range
2-6
CH20
(Standard terminal: B-564, Withstand high-voltage high-precision terminal: B-565)
+
-
A
+
B
-
b
b
Item
Isolated input, scanning
20, 50, 100, 200, 500 mV/F.S.; 1, 2, 5, 10, 20, 50, 100 V; 1-5V/F.S.
(Standard terminal: B-564, Withstand high-voltage high-precision terminal: B-565)
Thermocouple input
Compensation wire
DC current input
+
DC current
-
Shunt resister
Ex: For 4-20mA, add 250Ω (±0.1%) and measure in the 1-5V
range.
* Use B-551 (option) for the shunt resistor.
Description
+
-