Novatech Bitronics PowerPlex II, Руководство пользователя

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ML0044B December 1, 2017 Copyright 2017 Bitronics, LLC
Valid decoded IRIG-B information is passed to the PPX II system time process. The
system time process uses the highest precision valid input to regulate system time.
There are no configurable parameters for IRIG-B (signal propagation delay will need to
be added).
3.7.1 IRIG-B Electrical Specifications (Option)
Pulse Width Coded Signal
Absolute Maximum Input Voltage: -25 Volts to +25 Volts
Receiver Input Threshold Low: 0.8 Volts (min)
Receiver Input Threshold High: 2.4 Volts (max)
Receiver Input Hysteresis: 0.6 Volts (typical)
Receiver Input Resistance: 5 kohms (typical)
Amplitude Modulated Signal
Input impedance: >10K ohm
Input Format:
IRIG B000-B007, B120-B127
1kHz modulated sine wave, amplitude 3Vpp – 10Vpp,
modulation ratio 3:1
600 uSec (Program this offset in Configurator)
Connector:
BNC (Standard BNC cable from Master to PPX II)
3.8 Optional Energy Pulse Infrared LED
An Energy Pulse Infrared (IR) LED is located on the PPX II front panel to the top right
side marked as ENERGY. There is also a visible LED behind the IR LED that
illuminates. The visible LED makes it evident to the user that Energy Pulses are
occurring on the Infrared LED. This visual feedback insures that ENERGY pulses are
occurring in agreement with the Energy pulse setting. Energy values entered from the
webpage settings screen determine the trigger setting for pulses to occur on the
ENERGY LED. An infrared receiver is necessary to read the energy pulses
transmitted by the PPX II. Following is some general information on pulse energy
meters:
Pulse output meters are consumption monitoring devices. A pulse output power meter
will indicate the number of kWhs used by the system load. Historically, rotating meters
could report their power information remotely, using a pair of contact closures attached
to a KYZ line. In this scheme, line “K” is attached to two single-pole single-throw
switches “Y” and “Z”. “Y” and “Z” open and close as the meter’s disk rotates. As the
meter rotates in one direction, Y closes, then Z closes, then Y opens, then Z opens.
When it rotates in the opposite direction, showing export of power, the sequence