Wireless m-bus концентратор WRM-TS

Wireless m-bus receiver WRM-TS

WRM-TS is a wireless m-bus receiver, intended to collect data from various devices, working in modes T or S according to wireless m-bus standard (EN13757-4). This device has simple function – collect data from every wireless meter which is told to, and convert this data to normal m-bus telegram. This telegram can be read both through PC interface and/or m-bus interface by external controller. It is ideal for mixed type networks (wire and wireless m-bus) because it can read wireless devices and send needed data through standard m-bus interface. Supports Primary addressing of attached devices from 1 to 250 (defined by user), but can decrypt (if AES-128 data encryption) only addresses from 1 to 64.

user manual

Command reference


Technical characteristics of WRM-TS

RF band 868 MHz, 12 channels
wireless m-bus modes T1
m-bus slave interface (wired) 1.5mA
M-bus interface parameters 300/1200/2400/4800 bps
maximum devices allowed up to 240
serial port bps 0.3/1.2/2.4/4.8/9.6/19.2/38.4 kbps
power supply 12 Vdc/200mA, adapter 2 mm
power consumption @ 12Vdc < 2.0W (online)
display 3 leds (on/RF, RS-232 comm, m-bus)
work temperature from -20° C to +50° C
storage temperature from -50° C to +85° C
humidity 40 ÷ 90 %
dimensions (HxWxD), mm 125/70/30 mm
protection class IP30
own weight 170 g

Normal mode of operation WRM-TS

WRM-TS starts work immediately after power-up. All leds are lit for 0.5 seconds during initial startup, then device enters normal mode of operation. This means that it is expecting commands on its serial and m-bus ports, while listening for incoming wireless messages from remote meters. WRM-TS are set only through serial interface commands. Serial interface can be set to different speeds to match external reading device. For wireless device data to become available particular device must be ACTIVATED in WRM-TS memory. Once activated it is regularly read and updated. WRM-TS itself keeps track of time and saves timestamp with each record. There are no historical values. Read period can be set in minutes or hours, with maximum value of 240 hours and minimum value of 5 minutes. Normally three scenarios can occur:

  • Connect WRM-TS to master m-bus converter/display, like MBM-64/250 – then data will be visualized on display or read through wired m-bus interface
  • Connect WRM-TS to communication device like Ethernet/GPRS/phone modem – then data can be read from remote location
  • Connect portable computer to RS-232 port and read information manually

To start reading particular device there are two main steps that must be done:

  • set WRM-TS in desired wireless m-bus mode
  • activate a device in memory
  • *set desired interval for memorizing

*by default this value is on every 6 hours

Normally device is “listening” the air for incoming transmissions. It can be set in two modes:

  • work with filtering – “Normal mode”, which means that all transmissions that do not have proper headers, are rejected
  • work in “Accept all” mode, which means that every message in the air is processed
If one is not sure in which mode should work – we recommend using “Accept all” mode (which is default by the way). There is only one scenario in which filtering must be used – if wireless data is AES-128 encrypted.

Most of WRM-TS commands are ASCII-based, so setting can be done with simple terminal for RS-232. Anyway, there is special Gineers software for quick and easy setting of this device, including searching for wireless meters in range and activating them in WRM-TS memory.

All commands are detail described in WRM Command reference, which can be freely downloaded.