Lathem DDC2 User Manual
Page 55
Page 49
Digital Display Wall Clock Guide
DDC2 / 4-RS -485 Wiring
LTR4 / 8-512 to DDC2-RS / 4-RS
Terminal #
Signal
Signal
JP4 Connection
9 (D-)
Transmit Data (-)
Transmit Data (-)
D-
8 (D+)
Transmit Data (+)
Transmit Data (+) D+
BLK
BLK
115VAC
Local
Power
To
Other Clocks
LTR4 / 8-512 Terminal Connections
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
OPEN
1
2
3
4
5
6
7
8
DDC2-RS / 4-RS - JP4 Connector
LTR4 / 8-512
D
+
D
-
D
- o
f J
P
4
D
+
o
f J
P
4
11 30
:
H
M