Measurement Computing PointScan 200 Series rev.1.0 - Manual (Page 9)

PointScan/200 User’s Manual 9-25-01 General Information 1-3
DC Power Wiring PointScan/443
PointScan/442 gateways, and user instrumentation loops may be powered from the PointScan/443 power
supply. The PointScan/443 supplies 24 volts DC at a maximum of two amps.
DC Power Wiring (User DC Source)
PointScan/442 gateways, and user instrumentation loops may be powered from a single DC source. The
user DC power source must be between 18 to 30 volts.
Current Requirements
To calculate the current requirements, add the wattage required for the PointScan/200 Series modules in
use, then divide the total wattage by the DC power source voltage. Then add any current needed for user
instrumentation loops.
PointScan/200 LEDs
Every PointScan/200 module has a number of LEDs. These LEDs can be useful for system diagnostics.
These LEDs can be observed in the following states:
I/O Module Status LED
On, with a quick “OFF” BLINK [Long Blink](1.9 seconds ON, .1 seconds OFF) - The module is
configured and fully operational, but has not received a valid request from the host for a time longer than
the specified time out period. A communication time out has occurred.
Full ON [On] - The module is configured, fully operational, and has received communication from the host
device before the timeout period expired. This is the desired LED indication during system operation.
HALF BLINK [Long Blink] (1 second ON, 1 second OFF) - The module is not adequately configured and
requires a download from the IO Toolkit program.
Full OFF [Off] - There is no power to the module, or the status LED is being turned off intentionally by
the IO Toolkit during the module loading operation.
Off, with a quick “ON” BLINK [Short Blink] (1.9 seconds OFF, .1 seconds ON ) - The module failed
self-test at initialization. It will not attempt communication and should be replaced.
Status LED Wink Feature
The “Status” LED may be intentionally winked (10 blinks/second) by the IO Toolkit program to visually
identify the module when other modules are present.