Hall Research URA-RS232-C - Manual (Page 8)

8
Model URA-RS232
Connecting the URA-RS232 to the serial device
• Connect the URA-RS232 to the serial device (projector) via the serial
interface using the supplied programming cable.
• When connecting the URA-RS232 to the serial device (projector)
you must use a crossover serial cable in addition to the supplied
programming cable.
• This will connect the TX line of the serial interface on the URA-
RS232 to the RX line on the serial interface of the serial device
(projector).
• Without a crossover serial cable between the supplied
programming cable and the serial device (projector), the serial
device (projector) will not receive any commands from the URA-
RS232.
•
Connect the dry contact closure wiring to the EXT CTRL input to the
URA-RS232
.
SPECIAL CONNECTION INFORMATION:
• By default the URA-RS232 is configured to detect a CONTACT or a
NON-ISOLATED VOLTAGE. By special request at the time of the
order, the unit can be configured to detect an OPTICALLY
ISOLATED VOLTAGE.
• Both the CONTACT/NON-ISOLATED and OPTICALLY ISOLATED
configurations use the EXT CTL jack for detection of the signal.
o For Contact/Non-Isolated Voltage configurations of the
unit, ALWAYS ensure that if you supply a voltage to the
EXT-CTL jack, it is applied as CENTER POSITIVE in the
range of 3-24 vDC. The device will not sense 0 volts by
unplugging the EXT CTL jack. The sensing circuit is
normally ‘pulled’ high. This means that in order to detect the
‘No-Voltage applied’ condition, your circuit must represent a
low resistance.
o For OPTICALLY ISOLATED configurations, ALWAYS
ensure that the voltage is applied as a CENTER POSITIVE
in the range of 3-9 vDC. This voltage should be isolated
from the units Supply Voltage.
• Failure to observe these warnings may result in damage to the unit
and void your warranty
Connect the supplied Power Supply (6 vDC) to the URA-RS232 and you are
done
.