SMS ISKRA MT375 - Meter Connection of MT37 y Meters

Mx37y_Technical_Description_ENG_v2.00.doc
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Mx37y
─ Single- and three-phase electronic meters with built-in DLC
modem, GSM/GPRS modem or RS485 comm. interface
Fig. 45: Connection diagram of ME372 meter with
GSM/GPRS modem
Communication interface – M-Bus
Hardware type Function
Terminal
Communication interface Common 90
Communication interface Mini master 91
Communication interface – RS485
Hardware type Function
Terminal
RS485 – GND G 28
RS485 – A B 27
RS485 – B A 29
RS485 – A B 27
RS485 – B A 29
Inputs
Hardware type Function
Terminal
Common 20
Low voltage (up to 24 V, 27
mA)
Alarm input 15
Common 85
Low voltage (up to 24 V, 27
mA)
Alarm input 80
Outputs
Hardware type Function
Terminal
Common 35
High voltage (250 V, 6 A) Load control 34
12.2. Meter connection of MT37y meters
Meters can be connected in three-phase four- or
three-wire networks, as well as in a single-phase two-
wire network. Irrespective of the network type where
meters are installed, they keep their declared
metering properties.
Fig. 46: Connection diagram of MT371 meter with M-Bus
communication interface
Fig. 47: Connection diagram of MT371 meter with outputs
and M-Bus communication interface
Fig. 48: Connection diagram of MT372 meter with RS 485
communication interface
Fig. 49: Connection diagram of MT372 meter with
GSM/GPRS modem
Co
mmunication interface – RS485
Hardware type Function
Terminal
RS485 – GND GND 28
RS485 – B B 27
RS485 – A A 29
RS485 – B B 27
RS485 – A A 29
Low voltage transistor output
Hardware type Function
Terminal
Low voltage (up to 24 V,
27 mA)
Transistor 71
Common 70
Low voltage (up to 24 V,
27 mA)
Transistor 72
Inputs
Hardware type Function
Terminal
Common 20
Low voltage (up to 24 V,
27 mA)
Alarm input 15
Common 85
Low voltage (up to 24 V,
27 mA)
Alarm input 80