1111-08-0104-232-00

RS232 to RS422/RS485 or 20mA Auto Drive Enable converter, KD485-ADE

The KD485-ADE is similar to the KD485-STD but inserts a microprocessor (with two serial ports) into the data path which provides data buffering and facilitates baud rate etc conversion. The KD485-ADE is a highly versatile converter which is intended for RS232 to RS485 conversion but works equally well for RS232 to RS422, half duplex and full duplex. The KD485-ADE-4XX-4XX is similar to the KD485-STD-422-422 but it can also be used for connecting 2-wire RS485 slaves to a 4-wire RS485 bus, or vice versa. Subject to minimum intermessage gaps it can also operate as a 2-wire RS485 repeater.
Versions:
RS232<>RS422/RS485 converter
RS232<>20mA isolated converter
RS232<>RS232 port isolator
RS422<>RS422 port isolator

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Product variants

Article Number Product Name
1111-08-0104-232-00 + KD485-ADE + Request quote
RS232<>RS422/485 ADE industrial isolated converter, DIN-rail mounting
1111-08-0104-232-03 + KD485-ADE-232-20mA + Request quote
RS232<>20mA ADE isolated coverter, DIN-rail mounting
1111-08-0104-232-02 + KD485-ADE-232-232 + Request quote
RS232<>RS232 ADE port isolator, Rx/Tx/GND isolated coverter, DIN-rail mounting
1111-08-0104-422-01 + KD485-ADE-422-422 + Request quote
RS422<>RS422 ADE port isolator, Rx/Tx/GND isolated coverter, DIN-rail mounting

Description

The KD485-ADE is similar to the KD485-STD but inserts a microprocessor (with two serial ports) into the data path which provides data buffering and facilitates baud rate etc conversion. The KD485-ADE is a highly versatile converter which is intended for RS232 to RS485 conversion but works equally well for RS232 to RS422, half duplex and full duplex. Several standard application programs ("Modes") are provided in a built-in ROM:

  • Mode 0: emulates KD485-STD but also provides baud rate and character format conversion, with data buffering and precise edge timing regeneration.
  • Mode 1: as above, plus Auto Driver Enable (ADE). The Port 2 RS485 driver is automatically controlled according to Port 1 receive data.
  • Mode 2: RS485 Addressable Adapter. This makes possible to connect non-addressable RS232 devices to a 2/4-wire RS485 bus, through which they can be polled by a single Master. Devices which emit data continuously are also supported by the KD485's queues. The RS485 address and an optional lead-in byte are fully configurable.

The KD485-ADE is configured using a "dumb" terminal or a PC (via Port 1, RS232) using the supplied GUI-based KDCFG Windows configuration program.

  • Two serial ports (port 1 is RS232 and port 2 is RS422 or RS485)
  • 7-35V DC powered
  • Three-way isolated (Port 1, Port 2 and power input are mutually isolated)
  • Automatic Driver Enable on RS485
  • Data flow indicator LEDs
  • 30-115200 baud, low-emission drivers
  • High quality removable screw terminals
  • Replacement for Eurotherm D421

The KD485-ADE-232-232 is similar to the KD485-STD-232-232 but inserts a microprocessor (with two serial ports) into the data path which provides data buffering and facilitates baud rate etc conversion.

The KD485-ADE-232-232 is configured using a "dumb" terminal or a PC (via Port 1, RS232) using the supplied GUI-based KDCFG Windows configuration program.

  • Two serial ports (port 1 and port 2 are both RS232)
  • 7-35V DC powered
  • Three-way isolated (Port 1, Port 2 and power input are mutually isolated)
  • Data flow indicator LEDs
  • 30-115200 baud, low-emission drivers
  • High quality removable screw terminals

Specifications

Ports:
2 Asynchronous ports, Tx and Rx signals only. XON/XOFF selectable
Port parameters:
  • RS422/RS485: 0-115200 baud, all character formats
  • 20mA: 30-19200 baud
Interface options:
  • Standard product: port 1 is RS232; port 2 is RS422/485
  • Any combination of RS232, RS422/485 or 20mA loop can be supplied
RS232:
Receiver threshold +1.5V typ. Receiver Rin 5kΩ typ. TX o/p ±8V typ (3k load)
RS422/485:
Receiver threshold 200mV typ (differential). Receiver Rin 12kΩ min. TX o/p 0 to +5V (no DC load); +2 to +3V (120Ω ohm load)
20mA loop:
Input: LED, nominal drop 2V Output: o/coll. transistor, Vce(sat) < 2V 20mA current source: accuracy ±20%; no-load voltage approximately equal to KD485 supply voltage + 4V
Power supply:
7 - 35VDC (7-26VDC 20mA version)
Isolation:
64V PK, tested at >1000V AC RMS, 1 second
Environmental:
Operating temperature 0 to +50°C. Storage temperature -25C to +70C. Relative humidity (operating and storage) 0 to 90%, non-condensing
Ventilation:
Rail-mounted KD485 must have a 50mm gap above and below
EMC complianc:
Emissions EN50081-2 (94), immunity EN50082-2 (95)
Dimensions:
29mm (W) x 113mm (H) x 100mm (L) approx. in rail-mounted position, including screw terminals

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