How to set up bells in an Icon SP250 punch clock and bell timer

Press the SELECT button until the diamond  symbol is under the Time Table Program on the setting panel located under the punch clock cover.

Press Set to enter your selection for day of week, or work week, based on this table:
     Day of Week  
1   Monday only    
2   Tuesday only
3   Wednesday only
4   Thursday only
5   Friday only
6   Saturday only
7   Sunday only

8     Monday through Friday
9     Monday through Saturday
10   Every Day

Press SET again to program the signaling scheduling dates.
Next, use the + or - buttons to choose the Action for the dates set above.
Choose option 3 to turn on the external signal

Once programming is complete, connect the power supply to the back of the clock with the wires marked CLOCK.