Relay PW250 - Technical Data; General Data

PW250 · User Manual Version 1.1 – 11 / 2019
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PW250
4. Technical data
4.1 General data
Operating voltage
110 .. 240 VAC, 47 .. 63 Hz
Power consumption
max. 100W
Operating temperature range
0 .. 45°C
M-Bus voltage
42 V ( Mark), 28V (Space)
M-Bus basic current
max. 375 mA
Overcurrent threshold
> 500 mA
Internal bus resistance
8 Ohm
Communication speeds
300 .. 38400 Baud
Bit threshold
typ. 7,0 mA
Collision threshold
typ. 48 mA
Maximum cable length for
recommended cable type
JYSTY 1 x 2 x 0,8 mm
Total (all wires): 1km (9600 baud), 4km (2400 baud), 10km (300 baud)
Max. distance to slave (250 slaves at the end of the cable): 350 m
Max. distance to slave (250 slaves equally distributed): 900 m
Galvanic isolation
All interface are isolated from M-Bus and power supply. The Repeater input is
additionally isolated from the other interfaces.
Housing
Light-grey ABS plastic, protective class IP52
H x W x D: 229 x 204 x 76 mm
Mounting on a rail or wall, optional cylinder lock
LED indicators
Power, communication master, slave, warning, short circuit M-Bus, M-Bus activity
Interfaces
10/100 Mbit Ethernet, USB device, RS232C (SUB-D9), RS232C (terminals), RS485,
Repeater (M-Bus IN)
Terminals
3 pairs screw terminals for M-Bus, 3-pin screw terminal for RS232C, each 1 pair
screw terminals for RS485 and Repeater, 4-pin screw terminal for power supply