Lathem DDC4 manual LTR4 / 8-512 to DDC2-RS / 4-RS, Terminal # Signal JP4 Connection

Page 49 Digital Display Wall Clock Guide DDC2 / 4-RS -485 Wiring

LTR4 / 8-512 to DDC2-RS / 4-RS

115VAC	BLK
Local
Power	BLK H
	M

11 : 30

LTR4 / 8-512

DD+ -

LTR4 / 8-512 Terminal Connections

D+ of JP4 D- of JP4

To

Other Clocks

DDC2-RS / 4-RS - JP4 Connector

Terminal #		Signal	Signal	JP4 Connection
9	(D-)	Transmit Data (-)	Transmit Data (-)	D-
8	(D+)	Transmit Data (+)	Transmit Data (+)	D+

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

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