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_______________❀Product Information❀______________

Features:
This is  4 Channel Relay Module.
DC 12V power supply (voltage range 9-13v).
Standby current (all relays closed) 18MA, 1 channel  relay open 50MA, 2 channel relays open 81MA, 3 channel relays open 110MA, 4 channel relays open 141MA.
RS232 DB9 female interface.
"Read", "open", "close", "Self-locking" , click, interlock 6 commands, can satisfy most of the industrial control. 
Specifications:
Model: CE039_12V
Product series: RS232
Rated current: 10A
Rated voltage: DC12V
3C rated voltage range: below 36V
Relay load current: Max 10A
Relay load voltage: DC 1-100v or AC85-265v
Weight: 67g
Size: 8.5 x 4.7 x 1.8cm/3.35 x 1.85 x 0.71inch
Package Included:
1 x  RS232 Relay
Detail information: https://onedrive.live.com/redir?resid=3DFF9FAEE8435679!15927&authkey=!AG1AzoSlnv7JM4g&ithint=file%2crar
Demo video: http://v.youku.com/v_show/id_XMTQwNzQzNDY3Mg==.html