Measurement Computing USB-SSR08, Руководство пользователя

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Chapter 1
Introducing the USB-SSR08
Overview: USB-SSR08 features
This user's guide contains all of the information you need to connect the USB-SSR08 to your computer and to
the external devices you want to control.
The USB-SSR08 is a USB 2.0 high-drive, full-speed, solid state relay board supported under popular
Microsoft
®
Windows
®
operating systems.
The USB-SSR08 is a mounting rack for eight solid state relay (SSR) modules. The backplane is divided into
two groups of four modules each. You set the module type for each group with an on-board switch. You cannot
mix input and output modules within a group. The following configurations are possible.
! Four input and four output modules
! Eight input modules
! Eight output modules
The control logic polarity for each module group is switch-settable for active high or low (default) logic with an
on-board switch. The power-up state for output modules is switch-settable with an on-board switch.
Independent LEDs at each module position indicate the on/off status of each module. Switch settings can be
read back with software.
The USB-SSR08 has eight pairs of screw terminals for your field wiring connections. Positive (+) and negative
(-) relay contacts are brought out to the screw terminals.
The USB-SSR08 is powered by an external 9 V, 1 A regulated power supply that is shipped with the device. A
USB cable is also included. USB out and power out connections let you power and control multiple MCC USB
Series boards 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-SSR08 is shipped in a rugged metal enclosure that you can mount on a DIN rail or on a bench.
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