Contents:
- One RS232 4 Channel Relay Board

Required power:
Allows power supply voltage from 9 to 24V DC

Model:
R2S4CRD

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

Dimensions:
KMTronic_4Relay_Dimension.pdf

User Manual:
RS232_Four_Channel Relay Box.pdf

Communication Parameters:
8 Data, 1 Stop, No Parity
Baud rate : 9600

Commands:
FIRST chanel commands:
OFF command : FF 01 00 (HEX) or 255 1 0 (DEC)
ON command : FF 01 01 (HEX) or 255 1 1 (DEC)

SECOND chanel commands:
OFF command : FF 02 00 (HEX) or 255 2 0 (DEC)
ON command : FF 02 01 (HEX) or 255 2 1 (DEC)

THIRD chanel commands:
OFF command : FF 03 00 (HEX) or 255 3 0 (DEC)
ON command : FF 03 01 (HEX) or 255 3 1 (DEC)

FOURTH chanel commands:
OFF command : FF 04 00 (HEX) or 255 4 0 (DEC)
ON command : FF 04 01 (HEX) or 255 4 1 (DEC)

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