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 temperature detector input
Lead wire resistance should be 10Ω or
less per wire, three wires need to be
same length.
+ .....................................High-voltage terminal (terminal for high-voltage input signals)
- ......................................Low-voltage terminal (terminal for low-voltage input signals)
b .....................................Dedicated terminal when connecting resistance temperature detector
* Resistance temperature detector input terminals A (+) and B (-) are isolated within each channel.
Terminal b is shorted within all channels.
Input configuration
Measurement range
Thermocouples
Resistance temperature detector
2-6
CH20
+
-
A
+
B
-
b
b
Item
Isolated input, scanning
20, 50, 100, 200, 500 mV/F.S.; 1, 2, 5, 10, 20, 50, 100 V/F.S.; 1-5V
K, J, E, T, R, S, B, N, W (WRe 5-26)
Pt100, JPt100, Pt1000 (IEC751)
Thermocouple input
Compensationcopper wire
Current input
+
DC current
-
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.
* 250 ohms shunt register is the option B551.
Description
+
-