INTRODUCTION

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 ... 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.

The features of 8 channels SSR output / 8 channels photo isolator input board are:

*Support 8 SSR relay output channels and 8 photo couple input channels.

*The SSR operation characteristics are similar to relay.

*Provides more than 12 types of SSR output module.

*The Normal Open (NO) and Common contacts (COM) of each relay is brought out to the screw connector.

*Allow the photo input signals to be completely floated and prevent the ground loops.

*Input current : 80mA maximum for each isolated input.

*Input voltage : 15V DC maximum for each isolated input.

*LED indicates when corresponds channel is activated.

*Isolated or non-isolated modes selectable.

*Operating temperature 0 to 60 oC.

*Storage temperature ¡V20 to 70 degree oC.

*Humidity 5% to 95% in non-condensing

1. Terminal Board

The figure of pocket DIO terminal board is shown on the following page.

Before you use the terminal board, you must be sure to have this board plugged into pocket DIO.

The LED9 in terminal board shows the power on status. When it turns to light, we have power to this board, otherwise when it does not light, no power is provided.

The Jumpers are used to select isolated or non-isolated mode, when open the jumpers, it sets to isolated mode, otherwise when short the jumpers, it sets to non-isolated mode. 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)

2.3 Pin Assignment of TB1 (Photo Isolator)