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Digital Display Wall Clock Guide

DDC2 / 4-RS Wiring

 

 

 

3-Wire Synchronous (24VAC Correction)

 

H

 

M

115VAC

GRND

Local

AC IN

Power

AC RTN

24VAC

Return

 

From

 

Master Clock

Correction

BLK

BLK

BRN / WHT

BLU / WHT

To

Other Clocks

Clock will correct minutes hourly at HH:59 and hour and minutes twice daily at 5:59.

Wiring applies to secondary wall clocks such as:

Lathem type SS Cincinnati D10 IBM 77 Series

Simplex 77 Series, 93-9, 91-9, 941-9, 943-9

Stromberg 3000

Set switches 1-5 of S1 as shown.

Indicates depressed side of switch

1

2

3

4

5

6

7

8

OPEN

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Image 29
Lathem DDC2 manual Grnd, Ac Rtn, Blk Brn / Wht Blu / Wht, Wire Synchronous 24VAC Correction