Measurement Computing USB-ERB08 - Manual (Page 8)

Chapter 1
Introducing the USB-ERB08
Overview: USB-ERB08 features
This user's guide contains all of the information you need to connect the USB-ERB08 to your computer and to
the external devices you want to control. You can use the USB-ERB08 in your control applications to switch on
and off a variety of devices, such as fans, blowers, pumps, etc.
The USB-ERB08 is a USB 2.0 full-speed, electromechanical relay module that is supported under popular
Microsoft
® Windows ® operating systems.
The USB-ERB08 provides eight single-pole double-throw (SPDT) Form C electromechanical relays. The
digital I/O lines on your MCC USB Series module directly control the relays on your USB-ERB08.
You connect your field wiring directly to the board's screw terminals. The screw terminals provide three
connections to each relay – normally open (NO), normally closed (NC), and common (C).
You configure the relay control logic polarity and the relay power-on state with on-board switches. The relays
are configurable as two banks of four. Switch settings can be read back with software.
The USB-ERB08 is powered by an external 9 V, 1 A regulated power supply that is shipped with the device. A
USB cable is also included. Power OUT and USB OUT connectors let you power and control multiple MCC
USB Series products from one external power source and one USB port in a daisy chain fashion. Depending on
your load requirement, daisy chained boards may require a separate power supply.
The USB-ERB08 is shipped in a rugged enclosure that you can mount on a DIN rail or on a bench.
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