4−4
CHAPTER 4 Specifications
Input Unit Specifications
Item Description
Number of input channels 20 channels (maximum 200 channels with extension unit)
Input terminal type M3 screw type terminals
Input method Photo MOS relay scanning system
All channels isolated, balanced input
Terminal b to be used to connect the resistance temperature detector is short-
ed within all channels.
Scan speed 10 ms/1 ch maximum
Measurement ranges Voltage: 20, 50, 100, 200, 500 mV; 1, 2, 5, 10, 20, 50 V; 1-5 V F.S.
Temperature
• Thermocouples : K, J, E, T, R, S, B, N, W (WRe5-26)
• Resistance temperature detector: Pt100, JPt100, Pt1000 (IEC751)
Humidity: 0 to 100% (voltage 0 V to 1 V scaling conversion) *with B-530 (op-
tion)
Measurement accuracy*
1
(23°C ±5°C)
• When 30 minutes or more
have elapsed after power
was switched on
• Sampling 1 s/20 ch
• Filter ON (10)
• GND connected
Voltage: 0.1% of F.S.
Temperature
• Thermocouple
Thermo
couple
Measurement Temperature
Range (°C)
Measurement Accuracy
R/S 0
≤
TS
≤
100
100 < TS
≤
300
R : 300 < TS
≤
1600°C
S : 300 < TS
≤
1760°C
±5.2°C
±3.0°C
±(0.05% of rdg +2.0°C)
±(0.05% of rdg +2.0°C)
B 400
≤
TS
≤
600
600 < TS
≤
1820°C
±3.5°C
±(0.05% of rdg +2.0°C)
K – 200
≤
TS
≤
–100
– 100 < TS
≤
1370°C
±(0.05% of rdg +2.0°C)
±(0.05% of rdg +1.0°C)
E – 200
≤
TS
≤
–100
– 100 < TS
≤
800°C
±(0.05% of rdg +2.0°C)
±(0.05% of rdg +1.0°C)
T – 200
≤
TS
≤
–100
– 100 < TS
≤
400°C
±(0.1% of rdg +1.5°C)
±(0.1% of rdg +0.5°C)
J – 200
≤
TS
≤
–100
– 100 < TS
≤
100
100 < TS
≤
1100°C
±2.7°C
±1.7°C
±(0.05% of rdg +1.0°C)
N 0
≤
TS
≤
1300°C ±(0.1% of rdg +1.0°C)
W 0
≤
TS
≤
2000°C ±(0.1% of rdg +1.5°C)
Reference contact compensation accuracy ±0.5°C
*1: Thermocouple diameters T: 0.32
φ
, others: 0.65
φ
• Resistance temperature detector
Type Measurement Temperature
Range (°C)
Applied current Measurement
Accuracy
Pt100 -200 to 850°C (FS=1050°C) 1mA ±1.0°C
JPt100 -200 to 500°C (FS=700°C) 1mA ±0.8°C
Pt1000 -200 to 500°C (FS=700°C) 0.2mA ±0.8°C
Reference contact compensa-
tion accuracy
Internal/External switching
A/D converter Method :∆∑ method
Resolution :16-bit (Effective resolution: About 1/40000 of the +/- range)
Temperature coefficient Gain : 0.01% of F.S./°C
Zero : 0.02% of F.S./°C
* Zero occurs at the sampling intervals of 10, 20, and 50 ms.
Input resistance 1 M Ω ±5%
Allowable signal source
resistance
Within 300 Ω
Maximum permissible input
voltage
Between +/– terminals :60 Vp-p
Between input terminal/input terminal :60 Vp-p
Between input terminal/GND :60 Vp-p
Withstand voltage Between input terminal/input terminal :1 minute at 350 Vp-p
Between input terminal/GND :1 minute at 350 Vp-p
Insulation resistance Between input terminal/GND: At least 50 MΩ (at 500 VDC)
Common mode rejection ratio At least 90 dB (50/60 Hz; signal source 300 Ω or less)
Noise At least 48 dB (with +/– terminals shorted)
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.
If the sample interval exceeds 30 seconds, the average value of data obtained
in a sub-sample (30 seconds) is used.
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