2-39
CHAPTER 2 Checks and Preparation
Each input terminal
The connecting procedure of the signal input cable is described.
During wiring, conrm 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.
1. Voltage input
Thermocouple
+ .....................................High-voltage terminal (terminal input on the input signal’s high-voltage side)
- ......................................Low-voltage terminal (terminal input on the input signal’s low-voltage side)
2. Thermocouple input
Connect thermocouple to the + and – terminals.
3. Current input
Shunt resistance
E.g.: For 4-20mA, add 250Ω (±0.1%) resistance and
measure with a 1-5V range.
* For shunt resistance, use the B-551 (option).
Attach shunt resistance when measuring the current input.
4. Logic / pulse input
When inserting the cable, insert it while pressing here.
No. 1 to 4: High-voltage terminal (terminal input on the input signal’s high-voltage side)
G: Low-voltage terminal (terminal input on the input signal’s low-voltage side)
+3.3V
+3.3V
10kΩ
100kΩ
180kΩ
GND
LOGIC/PULSE
Comparator
•
G is the GND terminal for this GL840.
•
For the maximum input voltage, refer to "Regarding Maximum Input Voltage" in the next page.
To Next Page
Loading...
