TECHNICAL MANUAL
CVM 3000
C 5030 CV/04-99 GB
15
Note: the expansion dip-switches must all be set to ON (Figure 1-3 EXPANSION
MODULE, point N).
COM3:
half duplex RS485 serial interface for connection to printer, supervision systems,
Interface, Master:
99 RS485 +
100 RS485 -
98 reference
The cable used for the connections must be shielded and must have at least 1 sq. mm
wires for distances of less than 300 meters and 1.5 sq. mm wires for longer distances. The
maximum distance of the cable that connects the CVM Master, the Interface, the
supervision software to the farthest unit must not exceed 1000 meters. As shown in the
figure, the single shield sections must be connected to each other but not to the terminal
boards:
SHIELD
NB : maximum number of connected units = 8
NB: as indicated in the figure, a SINGLE serial cable must leave the CVM Master, the
Interface, or the Supervision software to connect the first unit, then proceed to connect
the other units successively.
+
Unit 2
+
-
G
Unit 3
+
-
G
-
G
Unit 1
INTERFACE (1)
MASTER (2)
SUPERVISION (3)
CVM3000
+ = terminal 99
- = terminal 100
G = terminal 98
