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JA-121T RS-485 bus interface

Out of stock

SKU JA-121T Category
SKU JA-121T Category

Out of stock


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.

JA-121T RS-485 bus interface

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

Technical specifications

Input part
Power from the control panel BUS 12 V DC (9 – 15 V)
Current consumption to calculate the backup (standby) 15 mA
Maximum current consumption for cable choice 20 mA
Output part – supply from an external device
Power from an external device 12 V DC (6 – 28 V)
Nominal current load 15 mA
Maximum current load 15 mA
RS-485 operational voltage 5 V (4.75 – 5.25 V)
Input/output separation galvanically (up to 4 kV)
Dimensions 52 x 38 x 14 mm
Weight 15 g
Classification Environmental class II (According to EN 50131-1)
Operational environment Indoor general
Operational temperature range -10 to +40 °C
Average operational humidity 75 % RH, non-condensing
Complies with EN 50130-4, EN 55032, EN 50581

Additional information


Jablotron (Europe)

Device Type

Price Range




JABLOTRON is the leading provider of intelligent security devices distributed by Smart Security in Lebanon. It is an international technology company that develops innovative products. and these products are designed to secure your smart home and office from all expected threats. They have received many certifications including an ISO 9001, ISO 13485, and an ISO 27001. So All these certifications are clear evidence that JABLOTRON is at the top of their game regarding quality and assurance. Moreover, their products are a world bestseller across 73 countries and that shows trust, and satisfaction in their products. Additionally, they have over 30 years of experience in the field of developing and production of alarm systems. JABLOTRON products from Smart Security include alarm panels, Bus and wireless motion sensors, bus; and wireless smoke sensors. Also bus; and wireless magnetic contacts, keypads; and controllers, as well as siren sounders. That is why Smart Security makes JABLOTRON a choice product when improving your smart home, and office security. Furthermore, Smart Security provides you with capable staff that are experts at installing, maintaining, and fixing Jablotron products if needed. In the end, it is your turn to secure your home by buying these products to safeguard yourself or your company. So call Smart Security now, and have the benefit of a free consultancy from our professional consultants.


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