2-6
Checks and Preparation
2.5
Connecting the Signal Input Cables
This section describes how to connect the signal input cables.
Terminal Configuration and Signal Types
Connection diagram
Direct voltage input
Thermocouple input
Resistance temperature detector input
Direct current input
+
......................................... 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.
CH1
CH20
＋
−
b
Direct voltage
＋
−
＋
−
Compensation
copper wire
Item
Description
Input configuration
Isolated input, scanning
Analog voltage
20, 50, 100, 200, 500 mV/F.S.; 1, 2, 5, 10, 20, 50 V/F.S.; 1-5V
Thermocouples
K, J, E, T, R, S, B, N, W (WRe 5-26)
Resistance temperature detector
PT100, JPT100, PT1000 (IEC751)
A/D resolution
16-bit
Filter
Off, 2, 5, 10, 20, 40
Filter operation is on a moving average basis.
The average value of the set sampling count is used.
A
B
b
＋
−
b
Lead wire resistance should be 10
Ω
or below
per wire, and equivalent among the three wires.
＋
−
Direct current
Shunt resistance
Ex: for current in the 4 to 20 mA range,
apply a resistance of 250
Ω
(
±
0.1%) and
perform measurement in the 1 to 5 V range.
