Lathem DDC2 - Manual (Page 54)

DDC2 / 4-RS -485 Wiring Digital Display Wall Clock Guide Page 48
LTR0 to DDC2-RS / 4-RS
Wire Signal Signal JP4 Connection
Gray Transmit Data (-) Transmit Data (-) D-
Orange Transmit Data (+) Transmit Data (+) D+
Black Signal Ground Signal Ground GND
BLK
BLK
115VAC
Local
Power
To
Other Clocks
LTR0 Fly Leads
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
H
M
LTR 0
B
L
K
O
R
N
G
R
Y
G
N
D
o
f J
P
4
D
- o
f J
P
4
D
+
o
f J
P
4
DDC2-RS / 4-RS - JP4 Connector