User Control Interface And Lcd Display Circuits - Orban OPTIMOD 6300 Operating Manual

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TECHNICAL DATA

User Control Interface and LCD Display Circuits

The control board contains interface circuitry, the CPU, the Ethernet interface chip,
the flash memory, the DRAM, the RS-232 serial interface circuitry, the GPI/O interface
circuitry, and the real-time clock, which keeps time for the 6300's automation func-
tions. The real-time clock is backed up by a DL2032 battery so that it keeps accurate
time even when the 6300 is powered down. The battery is socketed and can be
readily accessed by removing the 6300's top cover; the battery is located on the con-
trol board.
The user control interface enables the user to control the 6300's functionality. A rear
panel GPI connector allows optically isolated remote control of certain functions,
such as recalling presets, via contact closure. An RS-232 serial port and an Ethernet
port allow you to connect a modem or computer to the 6300. Front panel pushbut-
ton switches select between various operational modes and functions. A rotary en-
coder allows the user to adjust parameters and enter data.
1. Remote Interface and RS-232 Interfaces
Located on control board
A remote interface connector and circuitry implements remote control of certain
operating modes; Optimod 6300 has eight remote contact closure inputs.
A valid remote signal is a momentary pulse of current flowing through remote
signal pins. Current must flow consistently for 50msec for the signal to be inter-
preted as valid. Generally, the 6300 will respond to the most recent control op-
eration, regardless of whether it came from the front panel, remote interface, or
RS-232.
Component-Level Description:
After being current limited by resistors, the GPI control signals are applied to
two quad optoisolators, U17, 19, and then to the control circuitry.
U12 is the RS323 port interface chip. It is socketed for easy field replacement in
the event of overload, lightning damage, etc. All other circuitry is surface-
mount and is not field-repairable.
2. Switch Matrix and LED Indicators
Located on display board
Eleven front panel pushbutton switches are arranged in a matrix, configured as
three columns and four rows. These switches are the primary element of the
physical user interface to the 6300 control software. The host microprocessor
controls the system setup and function of the DSP according to the switch / ro-
tary encoder entered commands, the AES status bits from the digital input signal,
the RS-232, and the remote control interface status. The microprocessor updates
the LED control status indicators accordingly.
ORBAN MODEL 6300