© American Time
12
DSY261RSAE Owner's Manual
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Operation
Free Running Clock Operation
The Digital Clock/Timer can be used as a free running clock. No additional connections are required. It will run as a line syn-
chronous clock once time has been set.
Synchronous Secondary Clock Operation
The Digital Clock/Timer can be used as a correctable synchronous secondary clock. Simply connect it to a 3- wire or 4-wire,
synchronous master clock system, and set the rotary switch on the circuit board to 2 or 5. The location of the rotary switch
is shown below. For secondary clock wiring see diagrams in Appendix 1 and Appendix 2. It will run free between corrections
synchronized to the AC power line. The Digital Clock/Timer should not be used in the 24 hour format mode if it is connected
to a 3- wire or 4-wire synchronous system, since the 12 hour corrections cannot distinguish AM and PM.
Setting the Secondary Clock Mode Switch
A small rotary switch on the Digital Clock/Timer circuit board is used to select the secondary clock setting. The numbers on
this switch correspond to the correction settings listed below. For example, if your master clock supports a Faraday 2310-12
secondary clock, you will need to set the Digital Clock/Timer to Correction Setting 5 by turning the switch to position 5. The
location of the rotary switch is shown below. For secondary clock wiring see diagrams in Appendix 1 and Appendix 2
CORRECTION SETTING 2
EMULATES THESE CLOCKS:
Cincinnati
D1O
Faraday
2370, 2380
IBM
77 Series
Simplex
77 Series, 93-9,91-1, 941-9,943-9
Stromberg
3000
Lathem
Type SS Wall Clocks
CORRECTION SETTING 5
EMULATES THESE CLOCKS
:
Faraday
2310 Series - Hourly correct only
Honeywell
ST402A
Note:
Only correction settings 2 & 5 will emulate secondary clocks
Correction
240/120/24vac
12vac
K2+
K2-
K1+
K1-
12vac
12vac
UNREG
GND
PIEZO
S5
S4
S3
S2
S1
Clock/Timer
Power
Return
Sync Signal
from Master Clock
