Datum bc632D, Руководство пользователя

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CHAPTER ONE
1-2 bc632D Wall Mount LED Display (Rev A) Datum Inc
1.2 OVERVIEW
The bc632D is a wall-mounted time display designed to read serial time code signals, and digitally
synchronize multiple displays. The bc632D also incorporates a battery-backed real time clock which
maintains time during power loss and can be synchronized to an external time code signal.
The bc632D is programmed using a hand-held infrared remote control keyboard. The keyboard is
used in selecting the display format and time source that the bc632D decodes. It sets and reads the real
time clock, activates event time capture operations, and reads the captured time and status.
The principal performance characteristics are listed in Table 1-1.
Table 1-1
Principal Performance Characteristics
Item Item Description
Time Code Reader Time Code Formats IRIG A, B, NASA 36, 2137.
Carrier Range IRIG A - 10kHz
±
2%.
IRIG B - 1 kHz
±
2%.
NASA 36 - 1 kHz
±
2%.
2137 - 1 kHz
±
2%.
Flywheel Accuracy Less than 3.6 milliseconds per hour.
Modulation Ratio 3:1 to 6:1.
Input Amplitude 100 mVrms to 1 Vrms.
Input Impedance 10K
Ω
(AC coupled).
Real Time Clock Format 24 Hour.
Accuracy
±
10PPM.
Power 7 VAC from provided power supply; 40 W.
TTL/CMOS Input
Signals Event Capture TTL/CMOS, positive or negative edge
triggered, 50 ns min width.
TTL Output Signals 1 Pulse Per Second TTL/CMOS, positive edge on time.
RS-485 Input/Output
Signals Serial Time/Message TX/RX (+), TX/RX (-).
9600 Baud, 8 bits, 1 stop bit, no parity.
TX (-) compatible with most RS-232 devices.
RS-232 Input/Output
Signals Control Bus RS-232 IN, RS-232 OUT.
9600 Baud 8 bits, 1 stop bit, no parity.
Pins selectable as RS-23 or RS-485.
Operating and Storage
Environments The display is intended for indoor use only.