The 8 channels SSR relay output / photo isolator input board for pocket DIO provides SSR relay output functions and photo isolator input functions. The SSR relay output part provides 8 solid state (SSR) relays to drive 8 different output channels. Each relay channel can be used to control ON / OFF of external devices, to drive external high power relays, to activate alarms¡K.etc.
The photo isolator
input part provides 8 photo couple digital input channels, which allow
the input signals to be completely floated and prevent the ground loop.
Features of 8
channels SSR output / 8 channels
Before you use the terminal board, be sure that it is properly connected in the 8255 card
The LED 9 in the terminal board shows the power on status. When it lights, power is applied in the board, otherwise it is off.
The jumpers are
used to select isolated or isolated mode, when jumpers are open, the
mode is isolated, when short, the mode is non-isolated. JP1A and JP1B
correspond to channel 0, JP2A and JP2B correspond to channel 1, etc.
When set to non-isolated mode, the IxL is short to system ground (where
x is the channel number)
Pin Assignment of TB1 (Photo Isolator)
|Pin Assignment of T2 (Relay Output)|