Specifications

October, ‘03 Comdial 63
DX-80 Installation & Maintenance
2.15 Adding Loud Bell Control or Gate Control
One “dry-connection” is provided at the CPM of the DX-80 system for use with external ringing
devices or door opening apparatus. The DX-80 can be programmed to activate the dry contact
whenever certain CO lines ring or whenever the LBC code is dialed to actuate a door opener.
2.15.1 LOUD RINGING BELL INSTALLATION PROCEDURE
1. Remove the KSU cover (four screws at each corner) of KSU1.
2. Connect a static discharge wrist strap to a suitable earth ground. Be sure that the strap is touch-
ing bare skin.
3. Locate the CPM and “BELL” connector jack on the CPM.
4. Using an eighth-inch mini plug, wire the DX-80 BELL contact in series with an external 24vdc
power supply and 24vdc bell or ringing device. Important: Use only 24v or less voltage sup
-
ply and Direct Current (dc).
5. Program LBC operation for CO line ringing according to CO line group assignments. See the
DX-80 Technical Manual, Volume II, Programming for details on programming.
CPM
“BELL” control connector
(wires to bell and power
supply)
WARNING
Circuit boards are susceptible to damage caused by electrostatic
discharge. You must keep this in mind as you handle the circuit
boards. Refer to Comdial publication IMI01-005,
Handling of Electrostatically
Sensitive Components, for details.