MBUS-RELA4 - User manual
2 Introducing the device
2.1 General information
The M-Bus (Meter-Bus) is an established and well-known interface for automated meter reading. Especially
the ease of installation (simple two-wire system with powering by the bus) and the robustness are important
features. These are also special attributes that are of interest for use in industrial environments.
The M-Bus is defined in the standard EN 13757. It establishes an own physics as well as an own protocol.
The MBUS-RELA4 acts like a slave in the M-Bus network and can be controlled by a master according to
EN 13757-2/-3. Four bistable relays switch corresponding to the command from the master and preserve their
state even during loss of communication. The device works without external power supply and is completely
powered by the M-Bus. The state of the relays can be read back.
The MBUS-RELA4 comes in a housing 2 U (modules) wide and is intended for top hat rail mounting (DIN
rail 35 mm).
The serial number of the devices of the solvimus GmbH can be read from the housing.
2.2 Delivery variants and scope of delivery
The MBUS-RELA4 is offered in one variant.
Variant
Order number
M-Bus
MBUS-RELA4 (4 Relay outputs)
500344
Max. 2 unit loads
Table 3: Delivery variants
The scope of delivery contains the device and a Quick Start Guide.
2.3 Connectors
The various interfaces of the MBUS-RELA4 are on different sides of the device.
The following figure shows the device:
Figure 1: MBUS-RELA4
The following connectors are available at the MBUS-RELA4:
Page 10/21
UG_EN_MBUS-RELA4.pdf
Version: 1.3
Released
Frank Richter, 6 December 2022
© solvimus GmbH
