Lathem manual + of JP4, LTR4 / 8-512 to DDC2-RS / 4-RS

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

LTR4 / 8-512

D+

D-

LTR4 / 8-512 Terminal Connections

D+ of JP4 D- of JP4

To

Other Clocks

DDC2-RS / 4-RS - JP4 Connector

Terminal #

9(D-)

8 (D+)

Signal	Signal
Transmit Data (-)	Transmit Data (-)
Transmit Data (+)	Transmit Data (+)

JP4 Connection

D-

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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