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Motto

Which serial cable to use? M-Bus, GSM, Mark, WALL

  WALL (Wago) (connector F) Mark (markMX, mark320, ...) (connector M)

GSM modem
(connector F)

nullmodem (crossed) cable M-M *

modem (direct) cable

(usually supplied with the modem)

R095, R096
(M-Bus)
(connector M)

modem (direct) cable

(usually supplied with the modem)

nullmodem (crossed) cable F-F

IMP-5000, IMP-6000
(M-Bus)
(screw terminals)

cable A100 (Domat)

+ gender changer M-M

+ swap the Rx, Tx wires on screw terminals (Rx = white, Tx = green)

 cable A100 (Domat)

(standard connection: Tx = white, Rx = green)

A modem cable is not the same as a nullmodem cable + gender changer!

* Cable pinout:

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