Wiring Example Of Single-Phase Current Connection - Omron K7DD User Manual

Wiring Example of Single-phase Current Connection

1.
Install wiring between the
monitored power line and
the K7DD by referring to the
figure.
2.
Connect the
communications cables of
the communications
converter to the terminal
numbers (3) (+) and (4) (-) of
the RS-485 (a).
The CT input terminals have polarities (k and ℓ). Refer to
Power Line Data Generator User's Manual (N233)
Computer
(K7DD Support Tool)
RS-485
+
(Modbus RTU)
3
Communication (1)
4
-
Communications +
5
converter
RS-485
6
-
Communication (2)
External contact
Trigger signal
7
8
Critical level
25
Alarm output 1
26
Warning level
27
Alarm output 2
28
29
Output at Error
30
3-4 I/O Wiring (P.3-8) for details.
2 Procedures
-
+
Single-phase,
2-wire type
1 2
K7DD
k
19
R
20
ℓ
R S
MC
2
M
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