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Digital Display Wall Clock Guide

DDC2 / 4-RS -485 Wiring

 

 

 

OMCII to DDC2-RS / 4-RS

 

 

 

 

 

 

 

 

 

 

 

115VAC

BLK

 

Local

 

 

 

 

 

 

Power

BLK

 

 

 

H

 

 

 

 

M

 

 

 

 

 

 

 

 

 

11 30

OMC II

 

Trans

Trans

GND

 

 

-

+

 

 

 

 

 

OMCII DB9 Female Plug

GND

D+ of

D- of

of JP4

JP4

JP4

To

Other Clocks

DDC2-RS / 4-RS - JP4 Connector

Pin

1

2

8

Signal

Transmit Data (-)

Transmit Data (+)

Signal Ground

Signal

Transmit Data (-)

Transmit Data (+)

Signal Ground

JP4 Connection

D-

D+

GND

Cable should be RS232 twisted pair / CAT3 or CAT5 type. Maximum distance to last DDC Clock is 4000 feet.

Last DDC Clock must have jumper installed on position J2. See page 8 for details.

Set switches 1-5 of S1 as shown.

Indicates depressed side of switch

1

2

3

4

5

6

7

8

OPEN

Page 53
Image 53
Lathem manual Gnd, JP4, Omcii to DDC2-RS / 4-RS