Woodward 505HT, Инструкция по установке и эксплуатации

Страница: 36 / 199

Manual 35116 505HT for Pelton Turbines
Woodward 34
Hardware - Analog Outputs (4-20 mA)
This control provides an isolated group of (6) 4-20 mA outputs for customer use. Each output can drive up
to 600 ohm loads and provides fault monitoring of individual source and return currents.
Features
•
(6) Analog Output channels (4-20 mA)
•
Source and return current monitors
•
Group isolated from other circuits
•
Capable of driving higher impedance loads up to 600 ohms
•
Woodward GAP block, diagnostics, and configuration support
•
GAP configurable update rates of 5 ms to 160 ms
Table 2-12. Specifications (AO)
Number of Channels: 6 (each with readback)
AO Output Range: 0 to 24 mA, 0 mA during shutdown
AO Output Isolation: 0 V channel to channel
500 Vrms to EARTH and all other I/O
AO Accuracy (@ 25 °C): ≤ 0.024 mA (0.1% of FS=24 mA)
AO Accuracy (–40, +70 °C): ≤ 0.120 mA (0.5% of FS=24 mA)
AO Resolution: ~14 bits of full scale
AO Hardware filter (max): 3 poles @ 250 µ s
AO Load Capability: 600 Ω at 20 mA
AO Output Readbacks: (0 to 24) mA, source and return
AO Readback Accuracy: < 1% at 25°C, < 3% over full temperature range
AO Readback HW Filter: ~0.5 ms nominal
IOLOCK state AO circuits are driven to 0 mA during power-up, powerdown, core
voltage failures, and watchdog failures
Figure 2-9. Analog Output Block Diagram
Released