|USER'S MANUAL FOR 8 CHANNEL RELAY OUTPUT / ISOLATOR INPUT BOARD|
8 channel relay output Isolator input board
Product Code: A8RELAY/8PHOTO
The 8 channel relay output / isolator input board provides relay output function and isolator input function. The relay output part provides 8 Single Pole Double Throw (SPDT) relays to drive 8 digital output lines. Each relay channel can be used to control ON/OFF of external devices, to drive external high power relays, to activate alarms etc. There are 8 LED indicators correspond to 8 relays, when relay is energized, the corresponding LED is light. The +12V power source is user selectable from internal PC bus or external power supplier.
The isolator input part provides 8 Photo isolated Digital Input Channel, which allow the input signals to be completely floated and prevent the ground loop. There are 8 LED indicators corresponds to 8 input channels, when the input channel is activated at high stat, the corresponding LED is light. The power source is user selectable from internal PC bus or external power supplier.
|The features of 8 Channel Relay Output / Isolator Input Board are :|
|1. Relay Output Function.|
|2. Isolator Input Function|
|The package includes following item|
|Check that your PCI
bus Industry Control Card package includes the following items:
1.8 Channel Relay Output / Isolator Input Board.
2.One 26 pins flat cable.
|2.1Configuration For Jumper And Adjust VR|
| Before you use the 8
Channel Relay Output/ Isolator Input Board, you must ensure that the
power supplier, jumpers, and connectors are set correctly. Observe the
figure in the following, the proper settings for the 8 Channel relay
Output / Isolator Input Board are described in the follows.
Setting the threshold voltage of Photo Isolator, adjust VR which is on the PCB to get the desired threshold voltage. The external input voltage which is over the threshold voltage will be recognized as HIGH (1) and the relative led will be light. Otherwise that will be LOW (0) and led be off.
2.2 Relay Output Function
1.Internal / external power selection.
JP-18 is to select external or PC bus power supply JP18-1, JP18-2 short mean PC bus power JP18-2, JP18-3 short mean external power. Suppose you connect more than two 8 channel relay output/isolator input boards, we suggest you use external power.
2.External power supplier
TB3 is used to connect +12V external power, the configuration is shown in the follows.
The input voltage is 12V (+/-) 1V, and the power consumption for all 8 channel relay output is 0.3 amp. Â
2.3 Isolator Input Function
1.Internal/External power selection
User may use jumpers to select external or internal power supply. When the input signal is non-power signal (eg. Switch etcï¿½ï¿½), internal power is selected, the PC bus power +12V or 5V can be selected by user. When the input is voltage or current, the external supplier is mean the signal itself that can adjusted from +5V to +30V.
JP17 is used to select internal or external power supply of input channels. When JP17-1 is shorted, the PC bus +12V power is selected, when JP17-2 is shorted, the PC bus +5V power is selected. If we short JP17-3, then the external power supplier is selected.
2.External Power Supplier in the follows.
The power supplier of I10 to I17 are TB1 and the external power range is from 5V to 30V.
3.Isolated and Non-Isolated
JP0B to JP7B are used to select isolated or non-isolated. When JPXB-1, JPXB-2 is sort, then the
corresponds channel is in isolator mode. When JPXB-2, JPXB-3 is short, the IxL is short with system GND. So the external signal is in non-isolated mode. JP0A to JP7A are used to select power signal input or non-power signal input for the correspond channel. JpxA-1 and JpxA-2 short is power signal input mode. JpxA-2, JpxA-3 short is non-power input mode.
2.4 Signal Assignment
1.Signal assignment of 26 pins flat cable.
Â The 26 pins flat cable connector is connected to digital input / output interface card such as: industry control, TTL/I/O, 8255 I/O signal assignment of this connector is shown in the following.
2.Signal assignment of screw connector
The normal open, normal close, and common contracts signal of each relay are shown in the follows.