Art.-No.: KXP-2-RS  Datasheet: KXP-2-RS

The SmartRelay is used to connect Kentix wall readers (WA2, WA3, WA4, WA5). Up to two wall readers can be connected to the SmartRelay. Further wall readers are integrated into the system in the master-slave procedure via further SmartRelays. In this way, there is no restriction on the number of doors. The SmartRelay can be mounted on a standard DIN rail or in a 60mm switch box. The SmartRelay can be connected to an AccessManager (KXP16) via master-slave mode. The SmartRelay has 2 relay outputs, so it is possible to control external devices such as door openers.

SmartRelay front view

  1. Terminal block 1, see wiring diagram
  2. Terminal block 2, see wiring diagram
  3. Jumper for switching logic of relay output 1 (NC, NO)
  4. Jumper for switching logic of relay output 2 (NC, NO)
  5. Ethernet connection with PoE power supply, class 3

SmartRelay side view

  1. SD-Card slot

General Connection Diagram SmartRelay with RFID Wall Reader

Detailed Wiring and Terminal Diagram for two Doors

The following wiring diagram shows the general wiring of the SmartRelay module with two wall readers and two door contacts for monitoring the door status. The readers are connected via a BUS (RS485) with a total cable length of up to approx. 600m. As connection cable we recommend I(ST)Y-2x2x0.8 between SmartRelay and reader. The SmartRelay module is powered via Ethernet PoE. The module supplies two 24VDC voltage outputs as PoE splitters to supply the readers and the lock control. When supplying power to the locks (door opener, motor lock, magnet holder), please note that the splitter can supply a maximum of 10W of power. If more power is required for activation, the locks must be supplied with power via an external power supply unit. The advantage of using the splitter and PoE is the simultaneous emergency power supply of the door control when using a UPS at the PoE supplying switch.


  • The two readers are always supplied with power from the SmartRelay module. Power supply and communication bus (A+B) are routed in one cable.
  • The two relays (Rel1+2) can be set to the required logic NC/NO (Normally Closed/Normally Open) via jumpers.
  • The two door contacts at input 1+2 (DI1+2) require a potential-free contact (e.g. reed contact) for connection to DI1+2.
  • *The power supply by the PoE splitter can be replaced by an external power supply. This is necessary if the splitter does not supply the appropriate voltage (24VDC) or the required power (>10W).

Control of External Intrusion Alarm Systems

By means of a corresponding software configuration via the web interface of the integrated web server, it is possible to control external intrusion alarm systems with automatic control. In this context, forced operation means that an activation of the alarm system or an alarm zone is only possible if, for example, all windows/doors are closed and the alarm system releases the SmartRelay module. In principle, the wiring is always the same, depending on the software setting, the evaluation can be carried out with or without a query of the forced operation. The inputs must always be connected potential-free, the logic levels for the transfer are always continuous levels, no pulses. One alarm zone can be controlled per relay module, several doors in one zone require the corresponding number of relay modules.

When controlling an external alarm system, the SmartRelay module can only control one door, as the second relay is required to switch the alarm function. However, it is still possible to use two readers (inside and outside door).

  • READY TO ARM (Input: DI2): External alarm system signals that arming is possible (positive action).
  • ARMED (Input: DI1) : External alarm system signals that zone/system is armed.
  • ARM-DISARM (Output: Rel1): Arm/disarm switching of alarm system via output relay 1
  • DOOR-LOCK (Output: Rel2): Control of the door lock, independent of the alarm system.

All levels are continuous levels, no pulses and are permanently present according to the switching time. The logic of the relay (Rel1) can be changed via jumper JP1. The input levels of the digital inputs (DI1+2) are fixed. The HIGH level signals the described function, e.g. READY-TO-ARM = 1 or ARMED = 1.