The 8 channels relay output / photo isolator input adapter provides relay output functions. The relay output part provides 8 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 Ketc.

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 relay output / 8 channels photo isolator input adapter are:

Support 8 relay output channels and 8 photo couple input channels

1. Support 8 relay output channels and 8 photo couple input channels.
2. Max contact rating for relay: 120V / DC 1AMP.
3. Attraction time for relay: 3 ms.
4. Fall off time for relay: 2 ms.
5. Isolation resistance for relay: 100M OHM.
6. Life expectancy for relay: 100 million operation at signal level load.
7. Allow the photo input signals to be completely floated and prevent the ground loops.
8. Activation voltage: 17 to 28V or TTL level.
9. Address selectable.

The package includes following item

1. 8 channels relay output / 8 channels photo couple input adapter.
2. User's manual.

Your 8 channels relay output / 8 channels photo couple input adapter is designed to inserted in any available slot in designed to inserted in any available slot in your computer. In order to gain access to the expansion slots, follow the steps listed in the followings.

1.Set the switch and jumper.
2.Connect the expansion cable to DB37 connector.
3.Turn off all power of your computer and all peripheral devices before installing your adapter.
4.Remove the cover of the computer.
5.Insert your prefigured adapter into any available slot. Make sure your I/O card is firmly seated in the
  chosen slot.
6.Replace the cover of the computer.

Before you use the 8 channels relay output / 8 channels photo couple input adapter, you must ensure that the I/O address is set correctly, and set IRQ that you needs. Observe the figure in the follows, the proper settings for the 8 channel s relay output / 8 channels photo couple input adapter is described in the following.

2.1 Switch and Jumper Settings

1. I/O Address

Base Address + 0 :

Relay output channel 1to 8.

Base Address + 1 :

Photo input channel 1 to 8.

2. Jumper Setting

The jumper A and jumper B are used to set isolate signal of photo input. When set left position of jumper A and right position of Jumper B, the photo inputs are isolated, and you must use opto + and opto signals. When set left position of jumper A and left position of jumper B, opto is connected to ground (GND), you only use opto + signal. When set right position of jumper B, the opto + signal accepts TTl level.

2.2 Function Description

(Base address + 0) is used to control channel 1 to 8. When set the correspond bit to 1, it turns on the relay, this means relay is set to close state, when set the correspond bit to 0, it turns off the relay, this means relay is set to open state.

(Base address + 1) is used to control channel 1 to 8, bit 0 to bit 7 represents input channel 1 to channel 8. Normally, when input voltage range from 17V to 28V, it means 1, otherwise below 17V is 0. When set to TTL mode, the corresponding bit will be set to 0 or 1 according to TTl level.