5
25
24
26 27 28
DI1 DI2 DI3 DI4
35
34
36 37
DO1 DO2/报警
COM2
开关量输入
开关量输出
24 25 28
DI1 DI2 COM2
Switching Input Switching output (alarm)
Note
：
1.
Symbol "*" represent the current inlet terminal, this connection is only for reference, the practice is decided by actual condition
2.
/J represent the alarm output relay, multiplexing with switching output DO2.
4.6
Notice
4.6.1Voltage Input
Input voltage shall not exceed 120% of product rated input voltage ( 100V
、
220V
、
380V), otherwise PT shall be used,
On the voltage input end, 1A fuse shall be fitted.
4.6.2
Current
Input
Current input shall use external CT,
If the used CT connected with other meters, the connection is adopting series connection mode,
When wiring, using Connector bar is recommended, not connected with CT directly, to facilitate dismounting,
Before removing product current Input connection, firstly,
cutoff CT primary circuit or short the secondary circuit.
4.6.3 Adding function connection
COM of analog output and switching Input show that the common port is not earthing, actually.
Between analog output and switching input, common port is not connected;
This meter provides asynchronism half duplex RS485 Communication interface, adopts MODBUS- RTU protocol, various data
information may be transmitting on the Communication line .Theoretically, on the same line, meters up to 128 may be connected at the
same time, each meter can set up its Communication address (Addr)
，
Communication rate (baud) may be selected.
Communication connection recommendation of two-core shielded wire, its linear diameter is no less than0.5mm, 2 separately
connecting A
、
B, the shielded layer connecting earth, when wiring, the Communication line shall be far away from strong current cable
or other strong electric field environment.
Recommendation of adding matched resistance between A
、
B of the last meter, the rated resistance range is 120
Ω〜
10k
Ω
.
For connection mode in communication section are shown as following:
