Jablotron JA-121T BUS interface RS-485

The JA-121T module is a universal adapter to RS-485 for other systems. It enables connection of the JABLOTRON 100 system bus to an RS-485 serial line and vice versa.

Size: 52 x 38 x 14mm

Availability: In stock

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An application can be e.g. for the connection of a Smart Home system. It contains galvanically separated circuits for 4 kV. Data are sent in the case of a status change or on request. In the passive mode all data are only sent on request.

The module is addressable and it occupies one position in the system


Power supply via the control panel bus 12 V (9 - 15 V)
Module consumption in idle state 10mA
RS-485 output part 5V (4.75 to 5.25V)
Galvanic isolation 4kV bus / RS-485
Max. cable length of the TMP terminal 3m
Operation modes based on internal settings ASCII interface 9600bd / Altonica communicator
Dimensions: 52 x 38 x 14 mm
Environmental class according to EN 50131-1 II. General indoor
Operation temperature range -10°C to + 40°C
Security grade 2 in acc. with EN 50131-1, EN 50131-3,
It also meets the requirements of EN 50130-4, EN 55022, EN 60950-1

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JA-121T Manual EN
JA-121T Manual EN (234.12 KB) Download