<Toc> <1. Installation>
1-7
IM 05D01D02-41E 4th Edition: May 31, 2006-00
1.4 Hardware Specifications
PV Input Signals
• Number of inputs: 1 (terminals
11
-
12
-
13
)
• Input type: Universal input system. The input type can be selected with the software.
• Sampling period: 250 ms
• Burnout detection: Functions at TC, RTD, standard signal (0.4 to 2 V or 1 to 5 V)
Upscale, downscale, and off can be specified.
For standard signal, burnout is determined to have occurred if it is 0.1 V or less.
• Input bias current: 0.05 A (for TC or RTD b-terminal)
• Measurement current (RTD): About 0.13 mA
• Input resistance: 1 M or more for thermocouple or mV input
About 1 M for DC voltage input
• Allowable signal source resistance: 250 or less for thermocouple or mV input
Effects of signal source resistance: 0.1 V/ or less
2 k or less for DC voltage input
Effects of signal source resistance: About 0.01%/100
• Allowable wiring resistance: for RTD input
Maximum 150 /wire: Conductor resistance between three wires should be equal
However, 10 /wire for a maximum range of -150.0 to 150.0C.
Wire resistance effect: 0.1C/10
• Allowable input voltage: 10 V DC for thermocouple, mV, or RTD input
20 V DC for DC voltage input
• Noise rejection ratio: 40 dB (50/60 Hz) or more in normal mode
120 dB (50/60 Hz) or more in common mode
• Reference junction compensation error: 1.0C (15 to 35C)
1.5C (0 to 15C, 35 to 50C)
• Applicable standards: JIS, IEC, DIN (ITS-90) for thermocouples and RTD
Loop Power Supply
Supplies power to a two-wire transmitter.
(15 V DC: terminals
14
-
15
; 24 V DC: terminals
21
-
22
)
A resistor (10 to 250 ) connected between the controller and transmitter converts a
current signal into a voltage signal, which is then read via the PV input terminal.
Supply voltage: 14.5 to 18.0 V DC, max. 21 mA (provided with a protection circuit
against a field short-circuit); 21.6 to 28.0 V DC, max. 30 mA (only for models with 24 V
DC loop power supply)
When using the 24 V DC loop power supply of the UT320, keep the operating ambient
temperature between 0C and 40C.
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