24 Device Description
WAGO-I/O-SYSTEM 750
753-649 M-Bus Master Module
Manual
Version 1.1.2
3.7.3
Communication
Table 10: Technical Data – Communication
Transmission channels
1, bidirectional
Internal data width
24 bytes
(Mailbox 2.0 with 22-byte length)
Startup and configuration
WAGO-I/O-
PRO
V. 2.3,
e!
COCKPIT
Baud rates
• 9600 baud
• 2400 baud
• 300 baud
Cable length
max.
(total network)
• up to 1000 m at 9600 baud
*)
• up to 2000 m at 2400 baud
• up to 6000 m at 300 baud
Master-to-slave distance
max
• up to 500 m at 9600 baud
• up to 1000 m at 2400 baud or
300 baud
M-Bus standard load
max.
40 pcs, 1.5 mA each
Overcurrent shutdown
Type of monitoring Active current monitoring
Threshold Approx. 120 mA (fixed setting)
Minimum shutdown time 500 ms
*)
With a conductor size of 1.5 mm², the maximum possible total line length is reduced to 500 m.
The reason is higher discharge currents that can lead to an error message at lengths over
500 m.
3.7.4
Connection Type
Table 11: Technical Data – Wiring Level
Connection technology
CAGE CLAMP
®
Conductor cross-section
0.08 mm² … 1.5 mm² / 28 … 16 AWG
Strip length
8 mm … 9 mm / 0.33 in
Table 12: Technical Data – Power Jumper Contacts
Power jumper contacts
Blade/spring contact, self-cleaning
Table 13: Technical Data – Data Contacts
Data contacts
Slide contact, hard gold plated, self-
cleaning
