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Hardware Installation
1. Touch the metal part on the surface of your computer
to neutralize the static electricity that might be in your
body.
2. Plug your USB module into the selected USB port.
Hold the module only by its edges. Plug the module
firmly into place. Use of excessive force must be
avoided; otherwise the module might get damaged.
Pin Assignments
Signal
Description
Name
NO<0~7>
Normally open pin of relay output
COM<0~7>
Common pin of relay output
NC<0~7>
Normally close pin of relay output
IDInA <n=0~7>
Isolated digital input A
IDInB <n=0~7>
Isolated digital input B
LED Definitions
The USB Module is equipped with an LED indicator to
show the current status of the device. When you plug the
USB device into the USB port, the LED indicator will blink
five times and then stay lit to indicate that it is on. Please
refer to the following table for detailed LED indicator status
information
LED Status
ON
OFF
Slow blinking (5 times)
Fast Blinking
Isolated Digital I/O Connections
Single-ended Channel Connections
USB-4761 has 8 isolated digital input channels. Each of
isolated digital input channel accepts 5~30 V
puts, and accept bi-directional input. It means that you can
apply positive or negative voltage to an isolated input pin
(Vin ). The figure below shows how to connect an external
input source to one of the card's isolated input channels.
Relay Connections
After power on, the initial relay output status is shown as
below:
Description
Device ready to work
Device not ready to work
Device initializing
Device working
voltage in-
DC
Startup Manual 2
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