RS422/RS485 isolator Industry

Serial Isolator for the control cabinet

The Isolator model 66201 enables galvanically isolated connection between RS422 devices and RS485 bus systems.

Technical data:

Connections and displays:

• Serial ports:
  • RS422/RS485 interfaces, selectable
  • 9-pin SUB-D adapter
• Operating modes:
  • RS422
  • RS485 4-wire with automatic control
  • RS485 2-wire with automatic control
• Switching time:
  • approx. 10µs for switching from data send to receive
  • for RS485 automatic control (can be changed on request)
• Termination:
  • Connectable termination network for RS485 operation
• Baud rate:
  • 0..3 Mbaud
• Data format:
  • any format
• Galvanic isolation:
  • min. 1kV DC between all terminals
• Supported signals:
  • RxD, TxD, CTS, DTR
• Supply voltage:
  • 12..24V AC/DC (±10%)
• Current consumption:
  • typ. 70mA @12V DC, 35mA @24V DC
• Supply connection:
  • Plug-in screw terminal, 5.08mm spacing
  • Labeled "L+" and "M"
• Displays:
  • 1 LED Power
  • 1 LED Data

Housing and other data:

• Housing:
  • Plastic housing for top hat rail installation
  • 105 x 22 x 75mm (L x W x H)
• Weight:
  • approx. 100g
• Ambient temperature:
  • Storage: -40..+70°C
  • Operating in non-rowed installation: 0..+60°C
  • Operating in rowed installation 0..+50°C
• Permissible relative humidity:
  • 5..95% RH (non-condensing)
• MTBF:
  • 486.382h @25°C per MIL-HDBK-217
• Life expectancy:
  • > 25 years at 25°C ambient temperature
• Scope of delivery:
  • RS422/RS485 isolator, Industry
  • Please order power supplies separately as accessories

Problem of compensating currents:
Control loops are often potential-free. But if the controllers are connected to ground through the control bus and PC, compensation currents can unbalance the entire control loop. In such cases you need to ensure that the bus is only connected to the PC galvanically isolated or that the PC is made potential-free by suitable means.

Declaration of Comformity