NOTE:
UDP Relay board is developed for software con trol.
For control via Web Browser - Windows Explorer, Mozilla, Google Chrome... we recommend WEB version:
http://sigma-shop.com/8-channels-web-relay-board.html  

Manufacturer:
KMTronic LTD

Model:
UD8CRD

Features:
- Each relay has an LED to indicate when it is operated.
- Relay outputs can be used to turn ON/OFF lights, motors and other devices.

Specifications:
Relays have Normally Open (NO) and
Normally Closed (NC) Contacts each capable of switching max:
- 12VDC/15A
- 24VDC/15A
- 125VAC/15A
- 250VAC/10A

Supply:
Requires external 12 volt DC / 1000mA power supply

Dimensions:
108 mm / 150 mm/ 25mm (connectors mounted)

User Manual:
KMTronic Relay Controller Model UD8CRD

Default:
IP address: 192.168.1.199
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
UDP Port: 12345

UDP Commands:

FF0000 - Status Read command

FF0100 - Relay 1 OFF command
FF0101 - Relay 1 ON command

FF0200 - Relay 2 OFF command
FF0201 - Relay 2 ON command

............

FF0800 - Relay 8 OFF command
FF0801 - Relay 8 ON command

FFE000 - All relays OFF command
FFE0FF - All relays ON command

UDP Test Software example including source code (C#):

KMTronic UDP Test Software.zip
KMTronic UDP Test Software Source Code.zip

More Software examples (Windows, Linux, AIX, BSD, HP-UX, Solaris e.a.):
https://info.kmtronic.com/software-examples.html