PW20

Function of the Master-PW devices

M-Bus Level-Converter for 20 slaves

The devices in the PW series are M-Bus master interfaces for networks with 3, 20 and 60 slaves.

They are compact in design (wall or rail mounting) and have a broad supply voltage range. The actual operating state is indicated by several LED at the front. All device versions in the PW series are equipped with a RS232 port. The control computer can communicate with the M-Bus meters by the integrated IR optical interface using a ZVEI optical head.

Features

Integrated RS232-Interface (PC as master)
Optional optical interface (laptop / handheld as temporary master)
Max. 20 slaves (Unit loads with 1,5mA)
Power supply 12-24V DC/AC
Baudrates: 300 to 9600 Baud
Overcurrent and short-circuit protection on the M-Bus
Display for data transmission and system status
Rail or wall mounting

Datasheet

User Guide

Technical data

Operating voltage	10,8V .. 28V DC 10,8V .. 28V AC
Power consumption	max. 7W
M-Bus voltage (without load)	32V
Max. M-Bus quiescent current	30mA (20 Standardlasten)
Internal bus resistance	ca. 100Ω
Overcurrent threshold	60mA
Transmission speed RS232	300 .. 9600 Baud
Transmission speed RS485	—
Transmission speed optical	2400 baud
Galvanic isolation to M-Bus	—
Bit recovery	—
Temperature range	0 .. 55°C
Dimensions H x W x D	78 x 56 x 117 mm
Protection	IP40