Siemens LMV5 Series Manual page 21

Function of communication interfaces of AZL5...
Assignment of terminals
on AZL5...
Connection to higher
level systems
Modbus
Building Technologies Division
Industry Sector
The AZL5... is equipped with 3 different interfaces (connection facilities):
•
Interface for LMV5... basic unit: CAN bus including power supply for AZL5...
CAN X70 CAN bus connection for LMV5... basic unit, RJ45 (Sub-D connector X70)
•
Interface for PC / laptop: RS-232 (Sub-D connector X71)
COM1 port for PC, for parameterization and visualization by means of
PC tool software, Sub-D, 9 pins
•
Interface RS-232 for building automation (RJ45 connector X72)
COM2 port for building automation via external bus interface (RS232)
Note!
COM1 and COM2 cannot simultaneously be active!
CAN X70
PIN
2 CAN L
3 GND
4 VAC 2
9
5
7 CAN H
8 VAC 1
Pin
COM 1
COM1 X71
PIN
1
2 RXD
3 TXD
5 GND
Socket
Pins without designation = not connected
Communication to a building automation and control system is effected via data con-
nection through an external bus interface with galvanic separation connected to the
COM2 port of the AZL5... Depending on the configuration of the AZL5..., this port can
be used to serve either Modbus or eBus.
When using this bus protocol, the AZL5... operates as a slave. The transmission mode
employed is the RTU Modbus (Remote Terminal Unit). For detailed information, refer to
document «AZL5... Modbus, A7550». Standardized coupling software is available on
request.
COM 2
CAN
8 7
6
8
1
4 3 2
X70 X72
LCD
X71
7 8
6 9
5
2 3 4
COM2 X72
PIN
1 TXD
3 RXD
4, 6 GND
1
5 U 1
7 U 2
Socket RJ45
Operating field
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CC1N7550en
24.05.2011