The HDCD8TPX is an 8-way bi-directional distribution box with connections
for either halfduplex RS485 or RS232 control. There is an RS485 loop-through
connection and RS485 termination links to enable several units to be connected
in a daisy-chain wiring configuration. The unit is powered by 12 Volts DC @
250mA. There are three LEDs – one indicates power on and the other two indicate
data being transmitted to or from the receivers. Refer to Section 2.4 for more
detailed information on the operation of the LEDs.