MBUS-M13 - User manual
Figure 4: Dimensions and position of pads of MBUS-M13 (values are in mm)
Dimensions (without pin headers): 30 mm x 33 mm x 6.5 mm
Mounting
The device is intended for THT mounting.
• Temperature range for operation: 0-50 °C
• Temperature range for storage: -20-85 °C
• Air humidity: 0-95 % relH
2.5.2 Electrical specifications
Parameter
Value
Power supply
24VDC, +2/-10%
Current consumption in idle state (without bus load)
approx. 27 mA
Power consumption in the idle state (without bus load)
<0.7 W
Power dissipation of internal power circuit (at maximum bus load)
<1.3 W
Voltages M-Bus
24 V (space) and 36 V (mark)
Current rating M-Bus
150 mA (approx. 60 unit loads)
Short circuit protection M-Bus
PTC resettable fuse at MB+
Trip point of resettable fuse (at 25°C ambient temperature),
approx. 900 ms @ 360 mA,
theoretical values according to the data sheet
approx. 450 ms @ 440 mA,
(without taking the internal impedance of the module into account)
approx. 220 ms @ 530 mA,
approx. 50 ms @ 3300 mA
Reset behaviour of fuse (at 25 °C ambient temperature)
approx. 2.5 s @ 36 mA
Power supply for logic (isolated side, variant -S only) (TP_VDD)
3.0...5.0 VDC
Power supply for logic (non-isolated side) at X1 (VCC)
3.3 VDC
Current rating of logic power supply (variants -S and -G) at X1 (VCC)
50 mA
Internal pull-up pin #COL at X1 (to VCC, non-isolated part)
1 k
Ω
Current rating pin #COL at X1 (sink current)
10 mA
Max. baud rate
19200 bps
Galvanic isolation (variant -S only)
1 kV
Peak inrush-current momentarily for
<
1
µs
>
3
A
Table 7: Electrical specifications
2.6 Typical application scenarios
The module MBUS-M13 is an M-Bus master. In detail, it is a physical level converter, allowing the commu-
nication between a serial UART interface (TTL) and M-Bus slaves.
Frank Richter, 6 December 2022
© solvimus GmbH
Version: 1.09
Released
Page 13/18
UG_EN_MBUS-M13.pdf
