Data Sheet

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USB-RLY02 - 2 relay outputs at 16A

Technical Documentation

Overview

The USB-RLY02 provides two volt free contact relay outputs with a current rating of up

to 16Amp each. The USB-RLY02 is powered and instructed from any standard USB bus

and does not require any additional power. The relays are SPCO (Single Pole Change

Over) types. The normally open, normally closed and common pins are all available on

the screw terminals.

LED indication

The USB-RLY02 provides a red LED mounted immediately next to each relay to indicate

whether it is in a powered state (LED on).

Relay power rating

If the contact load voltage and current of the relay are in the region below the solid line in

the figure below, the relay can perform stable switching operation. If the relay is used at a

voltage or current exceeding this region, the life of the contacts may be significantly

shortened.

Summary of content (5 pages)

PAGE 1
USB-RLY02 - 2 relay outputs at 16A Technical Documentation Overview The USB-RLY02 provides two volt free contact relay outputs with a current rating of up to 16Amp each. The USB-RLY02 is powered and instructed from any standard USB bus and does not require any additional power. The relays are SPCO (Single Pole Change Over) types. The normally open, normally closed and common pins are all available on the screw terminals.
PAGE 2
load type Typical Rating applications Non inductive 16A @ or AC1 250V slightly AC inductive loads 3A @ Control of 120V electromagnetic AC AC15 load 1.5A @ (>72VA) 240V AC Control of AC3 750W motor Non inductive 16A @ or DC1 24V slightly DC inductive loads 0.22A @ 120V Control of DC DC13 electromagnetic 0.1A @ loads 250V DC Max DC load capacity A full datasheet for the relays used on the RLY02 is in useful links tab of the site.
PAGE 3
change the COM port number - just right click on it, select properties, select advanced and select the COM port number from the available list. The COM port may be left at the default baud rate etc, because they are not actually used - there is a direct USB connection into the processor. Commands The USB-RLY02 operates with an easy to use command set as described in the table below. Most commands are only a single byte and if applicable the USB-RLY02 will automatically send its response.
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91 Get relay states - sends a single byte back to the 5B controller, bit high meaning the corresponding relay is powered 92 5C Set relay states - the next single byte will set all relays states, All on = 3 (xxxxxx11) All off = 0 100 64 All relays on 101 65 Turn relay 1 on 102 66 Turn relay 2 on 110 6E All relays off 111 6F Turn relay 1 off 112 Turn relay 2 off Board dimensions 70
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Test program To get the USB-RLY02 up and running in the minimum amount of time we have put together a RelayTest program to demonstrate the functionality of the module.