====== Wireless Modbus Relay ======

**Wireless Modbus Relay**

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| Model number: ^ WR-1       |
| Frequency:    | ISM 868MHz (EU) |
| Dimensions:   | 93x45x27 mm     |

===== Applications =====

  * Remote controlled relay. Act as modbus RTU slave. Optimal for long range, no hopping.

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===== Installation and mounting =====
  * :!: Carefully open WR-1 module and configure address with jumpers. (Default address is 200)
  * :!: Place WR-1 module at least 10cm from other objects. Installation is not recommended inside metal cabinets.
  * Connect relay terminals 
  * Connect to 230V power supply
  * Configure radio pairing

{{ wiki:20_rdc_charger:03_hardware:wr-1_wiring.png?nolink&0x500  }}
{{ wiki:20_rdc_charger:03_hardware:wr-1_dimension.png?nolink&0x500  }}

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===== Features =====

  * remote controlled relay
  * act as modbus RTU slave
  * very long range, no hopping
  * up to 8 relays per network
  * protected private connection
  * multiple addressable groups 

===== Technical specification =====

| Power supply:          |                       230V, 50/60Hz, 1W |
| Ingress protection:    |                                    IP20 |
| Operating temperature: |                               -20..50°C |
| Storage temperature:   |                               -40..85°C |
| Relative humidity:     |                              0..85% n/c | 
 Modbus  
| Address range:         |                       200..207 |
| Relay mapping          |      coil 1(start address 00h) |
| Data bits & parity     |      8n1 |
| Supported functions    |      01 - read coil \\ 05 - write single coil \\ 15 - write multiple coils |
 Relay output
| Nominal rating         |                       10A 250Vac (NO), 3A 250Vac (NC) |
| (resistive)          |      5A 30Vdc (NO), 3A 30Vdc (NC) |
Radio
|Frequency band          |               ISM 868MHz (EU) |
|Subband                 |  L 866.8MHz, 25mW, 1% utility |
|Modulation              |  fSK 38.4kbps 80kHz bandwidth |
|Listen before talk      |    yes, delay limited to 20ms |
|Group address           |  32-bit, automatically generated |
|Connection time         |  10s power-on to network ready |
|Message delay           |  5ms from tx start to relay on |
|Output power            |                           25mW |
|Operating range         |  3..300m with optical visibility|

===== Modbus address setting =====
Change is applied right away, no reset needed.

{{ wiki:20_rdc_charger:03_hardware:wr-1_address_settings.png?nolink&0x500  }}

===== Radio pairing configuration =====

==== Create new secure group ====
  
  * turn on all devices as the same time
  * within 10 seconds, while RF LED is blinking, press and hold button on one of the devices
  * after a second, the new address is randomly generated and sent to all devices. RF LED will blink 3 times to confirm the new address.

{{ wiki:20_rdc_charger:03_hardware:wm1_configuration_1.png?nolink&0x500  }}

==== Add new device to the group ====
  
  * turn on the device
  * within 10 seconds, press and hold button on one of the existing devices
  * after a second, the existing group address is sent to the new device. RF LED will blink 3 times to confirm the address is sent.

{{ wiki:20_rdc_charger:03_hardware:wm1_configuration_2.png?nolink&0x500  }}

==== Examples ====
  

{{ wiki:20_rdc_charger:03_hardware:wr-1_examples.png?nolink&0x300  }}


===== Connection check =====
  * press the button shortly \\
With each press of the button, the relay will
switch on/off. Other devices are not affected.

{{ wiki:20_rdc_charger:03_hardware:wr-1_relay_button.png?nolink&0x150  }}

===== Factory reset =====
  * Hold button and turn the device ON
  * RF led will blink twice. Group address is now reset to default. 
  * Other devices will not be affected.

{{ wiki:20_rdc_charger:03_hardware:wm1_factoryreset.png?nolink&0x200  }}