[ 9 ]
WatchDog-15 User Manual
rev. A1.02 – Sept.24, 2012
DIGITAL SENSORS
Connecting external Digital Bus Sensors:
Connecting Digital Sensor Bus devices is as simple as plugging the sensor’s 6P6C plug into the Digital Sensor
jack located on the far right side of the WatchDog-15, as shown here.
The WatchDog-15 can support up to four external Digital-Bus sensors – however, it only has two physical
sensor jacks. To attach multiple sensors, a passive splitter is required, as shown in the diagram below. As
mentioned previously, the cable length of all sensors combined must not exceed 600 ft (200m).
passive 5-port
bus splitter
This example shows an RT-series temperature sensor, an RTAFHD3 temperature/airflow/humidity probe, and
a CCAT analog-to-digital “bridge” converter attached to the WatchDog-15 via a passive splitter, plus an
additional RTAFHD3 probe connected directly to the unit. Note that although the splitter is the standard 5-port
model sold by ITWatchDogs, only four sensors will be acknowledged by the WatchDog-15; if you attempt to
connect more than four, either via splitter or via the built-in ports, the additional sensors will simply be ignored.
(Note: connecting more than four sensors may also cause unpredictable operation if the device is rebooted or
power-cycled, since the order in which the sensors are “re-discovered” during the initial bus scan may not be the
same as the order in which you initially connected them, and the unit will stop discovering sensors once all four
entries in its device memory are occupied. This can have the effect of causing previously-known sensors to
seemingly “vanish” or display as “unplugged” even though they may still be physically connected to the unit.)
DIGITAL SENSORS
RT-series temperature sensor
RT-series temperature sensor
RTAFHD3 probe
RTAFHD3 probe
CCAT bridge converter
WatchDog-15
IT
Dogs
IP Address:
Default IP: 192.168.123.123
WatchDog-15
IT
Dogs
IP Address:
Default IP: 192.168.123.123
