USB-RLY08 USB-RLY08-B - 8 channel USB relay

USB-RLY08-B - 8 channel USB relay

The USB-RLY08B provides eight volt free contact relay outputs with a current rating of up to 1Amp each.
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€54.12 Price
€44.36 + VAT

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Overview
The USB-RLY08B provides eight volt free contact relay outputs with a current rating of up to 1Amp each. It is powered from any standard USB bus and has an exceptionally low maximum current consumption of approx. 90mA with all relays on. 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-RLY08B provides a red LED mounted immediately next to each relay to indicate whether it is in a powered state (LED on), there is also two LED's which will flash with USB transactions to and from the module, green indicating reception of data from the PC and yellow the transmission of data to the PC. Finally there is red power LED mounted on the opposite side of the board to the USB connector. 

Relay power rating
If the contact load voltage and current of the relay are in the region enclosed by the solid and dotted lines 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.

Commands
The USB-RLY08B 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-RLY08B will automatically send its response. The only exception to this being the "Set relay states" command which requires and additional desired states byte to be sent immediately after the command byte. 

Command

Action

dec hex
90 5A Get software version - returns 2 bytes, the first being the Module ID which is 8, followed by the software version
91 5B

Get relay states - sends a single byte back to the 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 = 255 (11111111) All off = 0
100 64 All relays on
101 65 Turn relay 1 on
102 66 Turn relay 2 on
103 67 Turn relay 3 on
104 68 Turn relay 4 on
105 69 Turn relay 5 on
106 6A Turn relay 6 on
107 6B Turn relay 7 on
108 6C Turn relay 8 on
110 6E All relays off
111 6F Turn relay 1 off
112 70 Turn relay 2 off
113 71 Turn relay 3 off
114 72 Turn relay 4 off
115 73 Turn relay 5 off
116 74 Turn relay 6 off
117 75 Turn relay 7 off
118 76 Turn relay 8 off

Visual studio express C# examples
The test program is available as Visual C# express ready built installation files here,  or as Visual C# express project with source files here.
Visual studio express is provided free from Microsoft: http://www.microsoft.com/exPress/download/

Specifications

Part. No. : USB-RLY08-B

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