General Description:
The IICS485 "SPIDER" is an automatic repeater that expands an RS-485 serial
communication network by increasing its maximum distance and number of nodes.
The repeater connects TEN RS-485 lines and transfers data in both directions
on each line. On receiving data from one line, the repeater automatically regenerates
and retransmits the data on the other lines. Data is transferred at the bit
level so all formats are supported and with nearly no delays. Each of the 10
lines has it's own set of control jumpers that can be used to manually enable
it's RX and/or TX capabilities, adjust the bias and add termination. Protection
for the overall network is provided through isolation on each of the lines.
In addition the IICS485 has a built-in controller on its own additional line
that can be communicated with in RS485 or RS232. On this channel a microprocessor
adds the ability to fully control the communication capability of any of the
10-RX and 10-TX lines through simple commands. In addition an adjustable watch
dog timer function is available that can reset the lines back to any given state
if communications time-out. The controller also adds the ability to multiplex
the serial lines which can give addressability to non-addressable units or individual
access to duplicate addresses. Because of the unique design of the IICS485,
different makes, models and protocals can be networked and communicated with,
through one comm port. Powerup and timeout settings are jumper selectable and
can be set to restore at fixed settings or settings that have been stored in
the EEPROM. The EEPROM settings are stored in non-volatile ram, through simple
commands. For even greater flexability, Communications on the board can also
be functionally split in half, by removing two jumpers. This turns the unit
into a double, 5 channel repeater. Plus the lines could still be controlled
by the micro-controller. All the repeater lines and controller circuitry can
be powered by a single supply with an output in the range of 9 to 35VDC at 5
watts max.
| Download: | ||
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IICS485.pdf | Multi-repeater schematic |
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IICS485CPU.pdf | CPU schematic |
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IICS485SS.pdf | Physical Drawing |
Click on this image of the IICS485 for full-size (151k) photograph:
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| Contact
Information: R.E. Smith, 4311 R. E. Smith Dr., West Chester, Ohio 45069 513-874-4796 Phone, 513-874-1236 Fax., rs485.com |
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