Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL Status Module RFL Electronics Inc.
July 15, 2007 12 (973)
334-3100
CIRCUIT DESCRIPTION
Status Module Overview
The Status Module is a channel card for the IMUX 2000 system. It transmits and receives data via the
T1/E1 serial link and generates and receives status commands via an adapter module. Sixteen total
status inputs and outputs can be supported. Setup and remote interrogation normally takes place via
the SCB of the IMUX but an additional RS232 port is also available. Front panel LEDs indicate the
status of the inputs and outputs.
The module consists of three major sections. The microcontroller section contains an 80C320
embedded microcontroller and associated support devices. The status FPGA and its associated circuits
handles all T1/E1 communication and status I/O. The SCB FPGA connects the processor to the SCB
of the IMUX. Miscellaneous other circuits are present to handle other functions
Microcontroller Circuits
The heart of the processor circuit is an 80C320 8-bit embedded microcontroller. It controls the setup
and interrogation of the cards active circuits. It does not do any processing of the actual T1/E1 data or
status signals. RAM and ROM provide memory and a related device provides port reconstruction for
the 80C320. A watchdog timer circuit provides a processor reset pulse on power up and monitors
processor timing. A TTL level converter provides an interface for the RS232 port.
Status FPGA Circuit
The status FPGA interfaces directly with the T1/E1 busses of the IMUX chassis. It is also connected
to the status inputs and outputs. The FPGA has a general purpose processor interface to allow the
processor to set up and interrogate the device.
SCB FPGA Circuit
This circuit is used to communicate with a common module (CM3 or CM6) over the SCB. The device
has been set up for eight Config bytes and four Status bytes. A type ID of 120 has been encoded into
the device.
Miscellaneous Circuits
The module has 16 LEDs on the front edge (DS1 to DS16) to indicate the condition of the status
inputs and outputs. These LEDs are driven by latches which are memory mapped off the processor. A
single LED (DS17) indicates an alarm condition which is driven directly off the processor. A five
position DIP switch is present to allow the user to set the SCB address. The processor reads this
switch to setup the SCB ACTEL.
A toggle switch enables a user to disable the changing of the status. The switch disables the outputs by
interrupting the data OK signal in the ACTEL.
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