This module is designed for interface adjustment between the
devices which have the RS485 interface and the Smart Home system.
The module has an internal 120Ω terminator resistor.


  • Supported protocols:
    • ModBus RTU
    • DMX512
    • Custom protocols
  • 1200 – 115200 baud rate

Example of connection.

Module parameters

Parameter name Value
RS485 port quantity 1
Power supply 11.5 … 27.5 V DC from CAN
Max current(24V) 25 mA
Bus type CAN (4-wire)
Mounting Free
Case material ABS
Protection IP40
Temperature range -10 … +50 °C
Size 45x42x14 mm
Weight 15 g


Module installation and connection procedure

  1. Connect the interface connector.
  2. Connect the CAN connector.
  3. Configure the module using LT setup.
  4. Check all equipment for proper operation.

Module shut-off and deinstallation procedure

  1. Disconnect the CAN connector.
  2. Disconnect the interface connector.

HW Settings

Name Type, range SUBID Default Description
cfg string 98 9600/8N1 cfg=’SPEED/BPS’, where
SPEED – baud rate [1200..115200];
B – data length [7,8];
P – presence and type of parity bit [N(No parity),E(Even parity),O(Odd parity)];
S – stop bit length [1, 1.5 or 2].

[Protocol] string 98 Protocol setting is described by protocol parameter. The following
protocols are supported”

  • ‘modbus’, Modbus protocol, at the end of redirection the checksum CRC16(Modbus) is added;
  • ‘dmx’, DMX protocol;
  • ‘CO2’ for connecting Larnitech CO2 sensors;
  • ‘salda’ for connecting Salda ventilation.


hw="cfg='9600/8N1' modbus"
echo on; off 98 'off' For settings check out and testing echo parameter can be used. Module
echo-reply can be turned on or off with the help of this parameter.

Echo parameter value:

  • ‘off’;
  • ‘on’.


hw="cfg='9600/8N1' echo='off'"