Connection Diagrams - CARLO GAVAZZI EM112 Instrucciones De Instalacion Y Uso

Connections

Connection diagrams

N 1 2
F
L
N
Fig. 3
5
+
6
-
Rc
Vdc Out GND
Fig. 5
3
4
M+ M-
Fig. 7
Diagram
Single-phase system 315 mA fuse (F), if foreseen by local law.
Fig. 3
Fig. 4 Digital input. Open contact = tariff 1, closed contact = tariff 2.
Pulse output (two possible connections)
Vdc: external voltage (direct current)
Out: output contact (transistor PNP open collector)
Fig. 5
GND: ground output contact (transistor PNP open collector)
Open collector outputs: the load resistance (Rc) must be designed so that the closed contact current is
under 100 mA (V
RS485 Modbus with Master
Note: additional instruments with RS485 are connected in parallel. The serial output must only be
Fig. 6
terminated on the last network device connecting terminals A+ and T. For connections longer than
1000 m or networks with more than 160 instruments, use a signal repeater.
M-Bus with Master
Fig. 7
8021446 | EM112
5
+
6
-
Rc
Vdc GND
M-Bus
Master
3
PC
4
is equal to 1 V dc). DC voltage (V
on
7
8
Fig. 4
3
T
5
A-
4
B+
6
GND
Fig. 6
Out
Description
) must be less than or equal to 80 V.
off
Modbus
3
T
Master
5
A- A-
4
B+ B+
6
GND GND
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