ENGLISH - 5/8
ELECTRICAL CONNECTIONS
Vac / Vdc
Vac / Vdc
Do not use
The power supply must be connected to terminals 2 and 3 or, alternatively,
the Z-PC-DINAL accessory can be used to supply through the rear IDC10
connector. The supply voltage must comply with the data on the device's plate.
The power supply source must be protected against any module malfunctions u
an appropriately-sized safety fuse.
The module has a MeterBUS port on terminals 22-24
•
POWER SUPPLY
•
COM2 SERIAL PORT
RS485
SERIAL
PORT
The module has a COM2 serial
port configurable via the SW2
switch on terminals 10-11-12.
•
MeterBUS PORT
CONNECTION STANDARDS
Type of
installation
Maximu
m speed
Connection
maximum
distance
Connection total
length
Type of
cable
Small in house
38400
<
350 m
<
1000 m
0.5 mm
2
, R < 30
Ω
Large in house
9600
<
350 m
<
3000 m
0.5 mm
2
, R < 30
Ω
Small wide area
2400
<
1000 m
<
3000 m
1.5 mm
2
, R < 90
Ω
The M-Bus is a non-polarized bus.
For the connection it is possible to use a two-wire shielded telephone cable or an unshielded duplex
cable following the indications in the table.
If a shielded cable is used, this must be
connected to earth only from the Z-KEY-MBUS side
.
Caution: The upper power supply limits must not be exceeded, as this
could cause serious damage to the module.
Switch the module off before connecting inputs and outputs.
To meet the electromagnetic immunity requirements:
- use shielded signal cables;
- connect the shield to a preferential instrumentation earth system;
- separate shielded cables from other cables used for power installations
(transformers, inverters, motors, induction ovens, etc...).
t
2
1
3
(SW2=OFF
)
10 GND
11 A(+)
12 B (-)
10 GND
11 RX
12 TX
SERIAL
PORT
RS232
(SW2=ON
)
22 M
23 Not used
24 MeterBUS-
