Communication Cable Connections - M-system R7CWTU Instruction Manual

■ INPUT WIRING
System /
Application
P1 P2 1K 1L
Single phase /
2-wire
source k
L1
K
N
P1 P2 P3 1K 1L
Three phase /
3-wire,
k
source
L1
balanced load
K
L2
L3
P1
source
L1
L2
L3
Three phase /
N
4-wire,
unbalanced load
P1
u v
source
U V
L1
L2
L3
N
Note: Use CLSE for CT.
Grounding is unnecessary for low-voltage circuit.

COMMUNICATION CABLE CONNECTIONS

■ MASTER CONNECTION
Master Station
DA
Terminating
Resistor DB
DG
SLD
FG
Note: Be sure to turn ON the terminating resistor located at both ends of the modules.
Crosswire between terminals DA – DB.
Master unit is connectable at both ends and at other points.
Terminal
P1 P2 1K 1L
u v
l load source k
U V
L1
L K
N
P1 P2 P3 1K 1L
u v v u
l k
load source
U V V U
L1
L K
L2
L3
P2 P3 N 1K 1L 2K 2L 3K 3L
k l
load
k l
K L k l
K L
K L
P2 P3 N 1K 1L 2K 2L 3K 3L
u v u v
k l
load
U V U V
k l
k l
K L
K L
K L
Blue
White
Yellow
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
System /
Application
Single phase /
P1 P2 P3 1K 1L 3K 3L
3-wire
Three phase /
source
3-wire
l load
L1
unbalanced load
N / L2
L
L3
(2CT)
P1 N
Three phase /
4-wire,
source
l
load
L1
balanced load
L
L2
L3
N
Remote Station
DA
DB
DG
SLD
FG
R7CWTU
Terminal
P1 P2 P3 1K 1L 3K 3L
u v v u
k l load source k
U V V U
L1
K L k
l K
N / L2
L3
K L
1K 1L P1 N 1K 1L
u v
k l k
load source
U V
L1
K L K
L2
L3
N
Remote Station
DA
Terminating
DB
Resistor
DG
SLD
FG
EM-7814 Rev.3 P. 5 / 18
l load
L k l
K L
l
load
L