• TCA-RS485communication barrier TCA-RS485communication barrier

TCA-RS485communication barrier

Item No: DYT12168237

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TCA-RS485communication barrier          

·   RS485 signal, intrinsically safe input. Distribution voltage 9V, 12V. The RS485 signal is converted to an isolated RS485 (or RS232) signal. Terminal supply or DIN rail power supply is available.

·    TCA-RS485 communication barrier is used to provide isolated DC power to the instrument in the hazardous area of the site, and the RS485 signal is isolated and converted into RS485 (or RS232) signal to the safety zone to realize two-way communication between the dangerous zone and the safety zone. The product requires independent power supply and is isolated between the power supply-input-output.

·    Danger zone signal: RS485 digital signal.

·    Safety zone signal: RS485 digital signal (or RS232 digital signal).

·    Signal transmission rate: ≤ 56kbps. Transmission delay: ≤10uS.

·    Card-mounted structure, mounted on a 35mm DIN standard rail card. Screw terminal, the wiring is fastened by M3 screw.

Model /Selection Table:


   Model and code


   Basic model


    RS485 communication safety barrier

   Signal conversion


    RS485 signal is converted to isolated RS485 signal


    Convert RS485 signal to isolated RS232 signal


    Special order

   Power distribution function


    9V power distribution or 12V power distribution


    Default, no power distribution

   Power supply voltage


    Power supply (terminal)2032VDC


    Power supply (rail)2032VDC

   Service Code


    Product Service Code

Selection example 

Example 1: TCA-RS485-1P-V1-QC9A  ...... (RS485 communication safety barrier, 1 2V power distribution, RS485 signal to RS485 signal, terminal power supply 20 ~ 32VDC)

Example 2: TCA-RS485-1-V1-QC9A ...... (RS485 communication safety barrier, RS485 signal to RS485 signal, terminal power supply 20 ~ 32VDC)

Example 3: TCA-RS485-2P-V1-QC9A...... (RS485 communication safety barrier, 9V power distribution, RS485 signal to RS232 signal, rail power supply 20 ~ 32VDC) 

Optional accessories 
Dedicated power supply DIN rail: PSDR-3000 series


Technical data:








    Housing Material / Color

    PC(Polycarbonate)+PPT Material / Black Gray

    Protection level



Environmental conditions:

    Ambient temperature


    Ambient temperature (storage or operation)


    Ambient humidity (operation)

   5~95RH (no condensation)


Input (intrinsically safe):

   Signal Type

   RS485 Signal

   Distribution voltage

   9V distribution voltage, current ≤100mA; 12V distribution voltage, current ≤60mA


Power supply:

   Signal type

    RS485 signal; RS232 signal

   Signal level rule

    Standard RS485 differential level; standard RS232 logic level

   Signal transmission rate


   Transmission delay



Power supply:

   Rated supply voltage


   Power supply voltage range


   Maximum current consumption



General parameters:

  Electrical isolation

   Input-output-power supply: 2500V AC RMS / 1 minute

   Electromagnetic compatibility (EMC)

   in accordance with IEC 61326-1 (GB/T 18268), IEC 61326-3-1

  LED status indication

   Power on, the product model on the panel is clearly visible through the LED backlight perspective, white.

  Applicable occasions

   Installed in a safe place, can be connected with intrinsically safe equipment in Zone 0, Zone 1, Zone 2; IIC, IIB, IIA; T4~T6 danger zone

   Field device suitable for connection

   RS485 communication interface

   Mounting method

   Horizontal or vertical mounting, can be mounted on standard 35mm DIN rail (or dedicated busbar backplane powered DIN rail)


Wiring parameters:

   Rigid conductor cross section (min/max)


   Flexible conductor cross section (min/max)


   Minimum Conductor Cross Section (AWG))


   Maximum Conductor Cross Section (AWG) 14


   Stripping length


   Connection type

    M3 screw fastening connection

  Screw torque

    Up to0.6Nm


Explosion-proof parameters:


   With distribution (terminal 3-4

   No power distribution (terminal 1-2 )

  Maximum output voltage (Uo)



  Maximum output current (Io)



  Maximum output power (Po)



  Maximum external inductance (Lo)



  Maximum external capacitance (Co)



  Maximum safety voltage (Um)




    CE certification

   in line with CE standards

   National Explosion-proof Electrical Product Quality Supervision and Inspection Center (CQST) certification

   [Ex ia Ga] IIC conforms to GB 3836.1, GB 3836.4, GB 3836.20

Product drawing / terminal wiring diagram:


Product Image Details

TCA-RS485communication barrier 1

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