YOKOGAWA UTAdvanced UT55A, User Manual

Page: 459 / 476

19-6
IM 05P01C31-01EN
19.1.10 Transistor Contact Output Specifications
• Number of outputs: See the table of Model and Suffix Codes.
• Output type: Open collector (SINK current)
• Output contact rating: Max. 24 V DC, 50 mA
• Output time resolution: Min. 50 ms
19.1.11 Heater Break Alarm Specifications
• Number of inputs: 2
• Number of outputs: 2 (transistor contact output)
• Use: Measures the heater current using an external current transformer (CT) and
generates a heater break alarm when the measured value is less than the break
detection value.
• Current transformer input resistance: About 9.4 Ω
• Current transformer input range: 0.0 to 0.1 Arms (0.12 Arms or more cannot be
applied.)
• Heater current setting range: OFF, 0.1 to 300.0 Arms
Heater current measured value display range: 0.0 to 360.0 Arms
Note: The CT ratio can be set. CT ratio setting range: 1 to 3300
• Recommended CT: CT from U.R.D., Ltd.
CTL-6-S-H: CT ratio 800, measurable current range: 0.1 to 80.0 Arms
CTL-12L-30: CT ratio 3000, measurable current range: 0.1 to 180.0 Arms
• Heater current measurement period: 200 ms
• Heater current measurement accuracy: ±5% of current transformer input range span ±
1 digit (CT error is not included.)
Ex.: CTL-12L-30
0.1 (Max. of current transformer input range) × 3000 (CT ratio) × ±0.05 (±
5%) ±
1digit = ±15 Arms ± 1 digit
• Heater current detection resolution: Within 1/250 of current transformer input range
span
Ex.: CTL-12L-30
0.1 (Max. of current transformer input range) × 3000 (CT ratio) / 250 = 1.2 Arms
• Break detection On-time: Min. 0.2 second. (for time proportional output)
19.1.12 24 V DC Loop Power Supply Specifications
• Use: Power is supplied to a 2-wire transmitter.
• Power supply: 21.6 to 28.0 V DC
• Rated current: 4 to 20 mA DC
• Maximum power supply: About 30 mA (with short circuit current limiting circuit)
19.1 Hardware Specifications