Data Sheet

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Tibbit Module

#05

M1S

RS485 port

RS485 port with full-duplex or half-duplex operation.

LINE A

LINE B

LINE C

LINE D

CPU

IO 1

IO 2

IO 3

IO 4

RS485

485+

485-

OUT/IN

Form:M1S

Power:

5V - Consumes 15mA

Mates with:#19, #20, #21

Details

This port has only +/-RX and +/-TX signal pairs. If you are working in the half-duplex mode, connect

+RX to +TX, and -RX to -TX. This will allow your system to communicate over a single twisted pair.

Direction control is through the RTS line — the line shall be LOW for data input and HIGH for

output. Keep the RX and TX pairs separate for the full-duplex mode and set the RTS line HIGH to

keep the TX enabled at all times.

PAGE 1
/4/2019 tibbo.com/datasheets/tibbits/05.html Tibbit Module #05 RS485 port M1S RS485 port with full-duplex or half-duplex operation. 1 IO 1 2 IO 2 3 IO 3 4 IO 4 12 5V 485+ 485- TX RS485 RX OUT/IN 11 LINE A 10 LINE B 9 LINE C 5 8 LINE D 6 7 CPU Form: M1S Power: 5V - Consumes 15mA Mates with: #19, #20, #21 Details This port has only +/-RX and +/-TX signal pairs. If you are working in the half-duplex mode, connect +RX to +TX, and -RX to -TX.
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1/4/2019 tibbo.com/datasheets/tibbits/05.html For "normal" RS485 applications, this Tibbit has to be connected to the TX and RX lines of the CPU's UART (see [SER]). Combine this Tibbit with terminal block devices -- #20 (nine terminal blocks) or #21 (four terminal blocks). The original version of this Tibbit made no use of IO3 and IO4. Revision B of the device now provide 5V power on IO3 and GND on IO4. LEDs There are three LEDs: two red and one green. Red LEDs are connected to TX and OUT/-IN lines.