User's Manual

116 • Hardware Onity HT24W / HT28 Smart
HTCOM Network
The HTCOM network has a total distance limit of 4500 feet. That is the entire
distance from the communications distributor to the very last device on the network.
This distance limitation can be extended by using repeaters in the network. If you
require online devices with cable distances over 4500 feet, contact Onity technical
support for assistance in configuring your HTCOM network.
Connections and Light Indications – Comm. Distributor
The following picture shows all of the connections of the distributor. It also shows
the location of lights that may be useful in troubleshooting HTCOM network
problems. When the distributor has power, the power LED should be on and steady.
When the distributor is connected to the PC and the software is running properly, the
LED labeled IN should be flashing rapidly. When the HTCOM network is active
and devices are connected properly, the OUT LED should also be flashing rapidly.
1. Power – 12VDC 6. Portable Programmer Connection
2. PC Connection 7. HTCOM OUT LED
3. Repeater Connection 8. HTCOM IN LED
4. HTCOM Output – DB9 connection 9. Power LED
5. HTCOM Output – 2-wire terminal block