E Q U O B O X S I N . E Q L C 2 5 0
–
U s e r G u i d e R e v . 1 . 0
S I N A P S I S . r . l . |
V i a d e l l e Q u e r c e 1 1 / 1 3 - 0 6 0 8 3 B A S T I A U M B R A ( P G )
–
I t a l y
T . + 3 9 0 7 5 8 0 1 1 6 0 4 - F . + 3 9 0 7 5 8 0 1 4 6 0 2 |
w w w . s i n a p s i t e c h . i t - i n f o @ s i n a p s i t e c h . i t
4
1.3
Sizing the M-Bus System
Cable type
•
Shielded telephone cable 0.5mm²
•
Cable maximum capacitive load: 152 nF/km
If you are using a cable with lower section, adapt the maximum length and the number of slaves
Follow the instructions provided in the table to size the M-Bus system
Type of plant
Maximum
distance
Overall cable
length
Cross-section
Number of
devices
(slaves)
Max.
transmission
rate
Small residential
buildings
350 m
1000 m
0.8 mm
2
250
9600 Baud
Large residential
buildings
350 m
4000 m
0.8 mm
2
250
2400 Baud
64
9600 Baud
Small complex
1000 m
4000 m
0.8 mm
2
64
2400 Baud
Large
developments
…3000 m*
5000 m
1.5 mm
2
64
2400 Baud
Direct vicinity
…5000 m*
7000 m
1.5 mm
2
16
300 Baud
Point-to-point
connection
…10000 m*
10000 m
1.5 mm
2
1
300 Baud
*Shielded cabling required at a distance in excess of 1000 m (see EN13757-2).
1.4
BUS signal specifications
M-Bus system
u.m.
Condition
Minimum Typical
Maximum
Unit of
measure
ment
Number of devices per
segment
n
SIN.EQLC250
0
250
Transmission rate
T
𝐶
𝑠𝑒𝑔𝑚𝑒𝑛𝑡
≤ 382𝑛𝐹
300
2400
9600
Bd
Bus Voltage (Master)
U
M
IM=0…400mA
30
39
42
V
Bus Voltage (slave)
U
S,R
𝐼
𝑆
≤ 1.5𝑚𝐴
30
42
V
Bus current (Master)
I
M,V
SIN.EQLC250
0
375
mA
Current (slave)
I
S,R
US=30…42V
0.75
1.2
1.5
mA
