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LTRx-512 Installation and User’s Guide
10
We recommend using stranded wire inside the Power Supply Box. Stranded wire allows for a firm
connection to the Quick Connect terminals. Stranded wires are also less likely to interfere with the
relay board components. If you must use solid wire, join the stranded wire to the solid wire in another
box
Note that applying 220/240 VAC power to a system not setup for that voltage level can severely
damage its electronic parts
•
Attach the supplied quick-connects to the wires as needed
•
Plug the quick-connects into the terminal block, as shown in the drawings above. Failure to
properly connect the ground wire can increase interference and cause unsafe operating
conditions
•
While the Master is fused internally to protect its electronics, you must also fuse the incoming AC
line as required by your local electrical code. You should connect the unit to a dedicated 10 Amp
circuit. You may need to add external MOV’s or diodes to sync a specific clock type – see Appendix
C1 for the wiring diagram of your type clock. Appendix D shows wiring diagrams for bell circuits and
communications
•
Complete any mounting steps in the previous chapter before turning on the power supply
•
Turn the toggle switch in the power supply to the “ON” position. The display may show the message
SYSTEM RECOVERY IN PROGRESS" for about 2 minutes, then you will see the date and time
•
Fasten the cover to the power supply
EXTERNAL PULSE-SYNC
Your Master can synchronize to other systems if needed. For example, if you have a non-compatible
time clock that the Master cannot synchronize, but it has a built-in bell ringer. By shorting
terminals 7 & 8 on terminal block P1, or terminals 6 & 7 of the communications terminal on the
back of the display unit, the Master will immediately reset to 00:00 (midnight). If you can program
the other device to close its circuit at 00:00 (Midnight) then the two systems will remain reasonably
in sync. WARNING: DO NOT APPLY POWER TO THESE CONNECTIONS – only close the circuit for a
short time (Duration must be at least 1, but not more than 2 seconds)