User’s Manual 7M
30
ELECTRICAL CHARACTERISTICS OF INPUT
TERMINALS
MAX. CONDUCTOR CROSS-SECTIONS
MEASURING INPUT
Type (connection):
three-phase (4u and 3u), single-phase (1b)
Reference current I
ref
5 A
Maximum current (I
max
):
80 A
Minimum current (I
min
):
0.25 A
Transitional current (I
tr
):
0.5 A
Starting current:
20 mA
Power consumption at I
ref
:
0.1 VA
Nominal voltage (U
n
):
3x230 V/400 V (–20 %...+15 %)
Power consumption per phase at U
n
:
< 8 VA
Nominal frequency (f
n
):
50 Hz and 60 Hz
Minimum measuring time:
10 s
PULSE OUTPUT S0
1
Pulse rate:
500 imp/kWh
Pulse duration:
32 ms ± 2 ms
Rated voltage DC (max):
27 V
Switched current (max):
27 mA
Standard:
EN 62053-31 (A&B)
PULSE OUTPUT S0
2
Type:
Programmable
Rated voltage DC (max):
27 V
Switched current (max):
27 mA
M-BUS SERIAL COMMUNICATION
(OPTION)
Type:
M-BUS
Speed:
300 bit/s to 9600 bit/s (default 2400 bit/s)
Protocol:
M-BUS
Primary address:
0 – (default)
RS485 SERIAL COMMUNICATION
(OPTION)
Type:
RS485
Speed:
1200 bit/s to 115200 bit/s (default 19200 bit/s)
Frame:
8, N, 2
Protocol:
MODBUS RTU
Address:
33 – (default)
OPTICAL IR COMMUNICATION
Type:
IR
Connection:
via USB adapter
Speed:
19200 bit/s
Frame:
8, N, 2
Protocol:
MODBUS RTU
Address:
33
Remark:
All settings are fixed
NFC
Protocol:
ISO/IEC 14443 Part 2 and 3 compliant
Frequency range:
13.56 Mhz
Baudrate:
106 kbps
Operating distance:
up to 15 mm from LCD
(distance depends on used reader)
TARIFF INPUT
(OPTION)
Rated voltage:
230 V (+15 % –20 %)
Input resistance:
450 kOhm
Rated voltage:
230 V (+15 % –20 %)
Maximum load current:
50 mA
