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

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

Specifications of MR-BUSIO-SSRAC

• Rohs: yes
• Product: BusIO SSRAC Boards
• Description/function: MR-BusIO-SSRAC is an experiment board for switching AC output voltage by using solid state relay
• Dimensions: 2.8 in x 0.63 in
• Operating Supply Voltage: 400 VAC
• Tool Is For Evaluation Of: MOC3042
• For Use With: MR-BusIO-MAIN

The MR-BusIO-SSRAC is an experiment
board for switching AC output voltage by
using SSR (Solid State Relay). SSR is
similar to mechanical relay that consists of
inductor and surface contact. The internal
structure of SSR uses semiconductor
material to switching ON and OFF. The
maximum controlling voltage is 400VAC at
6A. It is best for switching AC output
voltage.
The board can be use with MR-BusIO-
MAIN board or stand-alone. PCB size is
0.63” x 2.80”
General structure of SSR is shown in
figure 1. Voltage applied to the input of an
SSR causes the LED to shine on the
photo-sensitive diode. The voltage is
causing the TRIAC to turn on.
The board consists of MOC3042 IC which
internally combined photo-coupler and
zero
function of zero crossing circuit is to
detect the voltage at zero point and supply
current to the gate of the TRIAC. For
330ohm resistor and 0.1uF capacitor at
the gate of the TRIAC, their function is
sharing the current at the gate so they are
not too high. Also, protect external noise
into circuit.
Operation:
MR-BusIO-SSRAC
FIG 1: General structure of SSR
crossing
Description
Copyright © 2007 MicroResearch
circuit
GRAVITECH GROUP
together.
TM
User Manual
BusIO Solid State Relay BOARD
The
WWW.GRAVITECH.US
The circuit is operating with AC voltage
only. It is start when applying logic HIGH
to an I/O pin. The indicator LED then
illuminated which mean it is now close
circuit.
User can connect AC load up to 400VAC
at 6A through output 2-PIN terminal block.
In case of interfacing with inductance load
such as motor, user should add Snubber
circuit by putting R1 47ohm 1W resistor
and C1 0.1uF 600V capacitor as shown in
Figure 1.