The AD-KAB10 GX provides a remote controllable relay switching contact (changeover contact). Remote control is via the RS-485 bus interface. The device communication is realized using the MODBUS RTU protocol.
The power supply and the RS485 bus connection is possible via the rear DIN rail connector. The device is equipped with two rotary coding switches with which the bus address can be set on the device.
The static contact control is carried out with a control value 0 or 1.
A pulse output function (with 1 Hz) is triggered with a control value of 1 to 255 and can be modified or stopped at any time with other values. An optical search function allows the localization of a single device in a device network when in a cabinet several devices are on a top hat rail. For this purpose, the green LED is set in a time-limited flashing mode, between 1 and 255 seconds.
For the relay, a defined start state can be set so that when the supply voltage returns after a power failure, a system can assume the desired start state.
The interface settings as well as the device address can be modified during operation by means of Modbus commands. All Modbus register addresses and associated commands are listed in the document attachment.



Remote control of consumers such as valves or motors in building automation and automation technology.

Specific characteristics

  • RS485 bus / Modbus RTU protocol
  • Rotary coding switch for bus address setting
  • Presettable contact start state
  • Potential-free contact (changer)
  • Switching Power Supply
  • Pulse and toggle output function
  • Pulse summation (1/1000 + 1/100 + 1/10 + 1)
  • Optical search function, Modbus master mode

Business data

Order number
Customs tariff number / country of origin 8543 70 90 / Deutschland


Data sheet pdf en-kab10gx.pdf (205 kB)
Tender text zip (9 kB)
STEP file step gx.step (3 MB)
Safety instructions pdf ad-safety-instructions.pdf (43 kB)

Technical specifications

Maximum switching load AC 250 V, 2 A
Maximum switching load DC 50 V, 2 A
Contact construction Changeover contact
Switching operations mechanical 10000000
At 230V/2A AC, cos(phi)=1 500000
At 24V/1 A DC 1000000
Transmission behaviour
Response time Max. 15 ms
Software protocol Modbus-RTU
Data format 19200, e, 8, 1
Max. bus users 99
Bus termination 120 ohms both sides at the end
Max. length of bus 500 m (no spur lines)
Cable Twisted and shielded
Supply voltage 18 ... 30 V DC
Max. power consumption 700 mW (24V DC)
Dimensions (WxHxD) 6,2 x 92 x 101 mm³
Manner of fastening DIN rail mounting 35mm, EN 50022
Type of protection IP 20
Connection method Screw clamp
Bolting torque terminals 0,5 Nm
Wire cross section Max. 2,5 mm2
Weight ~ 70 g
Environmental conditions
Permissible ambient temperature -10 ... +50 °C
Storage and transport -10 ... +70 °C (no condensation)
Product family standard 1) EN 61326-1
Emission 2) EN 55011, CISPR11 Cl. A, Gr. 1
1) During checking, slight signal deviations are possible.
2) Warning:
This device is not intended to be used in residential areas and can not ensure adequate protection of radio reception in such environments.
Electrical safety requirements
Product family standard EN 61010-1
Galvanic isolation, test voltages
RS485 bus / power supply 1,5 kV, 50 Hz (1 min)
Relay contact 3 kV, 50 Hz (1 min)
Protection circuits
RS485-Bus Electrical surge protection
Power supply Electrical surge and reverse current protection

Block and wiring diagram




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