MR-BUSIO-RELAY Gravitech, MR-BUSIO-RELAY Datasheet - Page 2

• Manufacturer Part Number: MR-BUSIO-RELAY
• Description: Daughter Cards & OEM Boards BUSIO RELAY BOARD
• Manufacturer: Gravitech

Specifications of MR-BUSIO-RELAY

• Rohs: yes
• Product: BusIO Relay Boards
• Description/function: MR-BusIO-RELAY is an experiment board for switching AC or DC output by using mechanical relay
• Dimensions: 2.8 in x 0.63 in
• Operating Supply Voltage: 24 V
• Tool Is For Evaluation Of: PC817
• For Use With: MR-BusIO-MAIN

The MR-BusIO-RELAY is an experiment
board for switching AC or DC output by
using mechanical relay. The maximum
controlling voltage is 250VAC at 5A or
24VDC at 10A. It is using PC817 Photo-
coupler IC to isolate high current and low
current. It is best for switching output load.
The board can be use with MR-BusIO-
MAIN board or stand-alone. PCB size is
0.63” x 2.80”
The PC817 require at least 5mA to drive
input photo-coupler LED. It can take up to
6V in reverse bias. For an output
(between collector and emitter), it can
drive up to 35V with 50mA continuous
current.
The operation of this board starts when
applying logic HIGH to an I/O pin. The
indicator LED then illuminated. The output
of PC817 is driving second BC547
transistor which drive to energize the coil
of the relay. The diode across the coil is to
protect back EMF.
User can connect DC or AC load through
output 3-PIN terminal block. It connected
directly from the relay: pin1 NO (Normally
Open), pin2 COM (Common), and pin3
NC (Normally Close).
User can connect output AC of DC load
up to 250VAC at 5A or 24VDC at 10A.
Operation:
Description
MR-BusIO-RELAY
Copyright © 2007 MicroResearch
GRAVITECH GROUP
User Manual
TM
BusIO Relay BOARD
WWW.GRAVITECH.US
The MR-BusIO-MAIN is available for
purchase via our website. If you don’t see
the item you need, please contract our
sales department at
• MR-BusIO-MAIN
Experiment board which receives output
signals from any microcontrollers. The
signals then distribute to daughter boards
for each experiment. It designed to
connect directly with 10PIN MRconnect©.
It is a quick and easy way to control up to
8 daughter boards.
MR-BusIO-MAIN
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