Optimod-AM 9400 V1.2 Operating Manual - Orban

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TECHNICAL DATA ORBAN MODEL 9400
pared to convey this fact to Orban customer service if you call for technical assistance.
The control board is divided into two assemblies: a “base board,” which has interface
circuitry, and a “CPU controller module,” which plugs into the base board and
which contains the CPU, the Ethernet interface chip, the flash memory, the DRAM,
and the real-time clock, which keeps time for the 9400’s automation functions. The
real-time clock is backed up by a DL2032 battery so that it keeps accurate time even
when the 9400 is powered down. The battery is socketed and can be readily accessed
by removing the 9400’s top cover; the battery is located on the foil (top) side
of the CPU controller module.
User Control Interface and LCD Display Circuits
The user control interface enables the user to control the 9400’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 9400. Front panel pushbutton
switches select between various operational modes and functions. A rotary encoder
allows the user to adjust parameters and enter data.
1. Remote Interface and RS-232 Interfaces
Located on base board
A remote interface connector and circuitry implements remote control of certain
operating modes; OPTIMOD-AM 9400 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 50 msec for the signal to be interpreted
as valid. Generally, the 9400 will respond to the most recent control operation,
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, U10, 12, and then to the control circuitry.
Octal driver U1 buffers the RS-232 port, which is located on a small daughter
board.
U10, 12 and U1 are socketed for easy field replacement in the event of overload,
lightning damage, etc. All other circuitry is surface-mount and is not
field-repairable.