bolid S2000M Manuel d'installation - Page 4

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4.1.5 If devices connected to the RS485 interface are powered from different power
supplies, please integrate them into 0V circuits (see Fig. 4). As in integrating wire, it is
recommended using a free conductor or pair in RS485 cable. Using an ungrounded cable
screen (if available) for 0V circuit is also acceptable.
A
B 0V
620
Device
Device: Orion system device connected to the S2000M panel over RS-485 (up 127) or S2000M
panel (1 only.);
1: RS-485 line (twisted pair)
2: Potential equalization conductor
3: Screen (if screened cable is used).
Figure 4.
Connecting to RS485 Interface
Panel
A
B
0V
Device
A
∞
B
0V
Panel – S2000M Panel
Device – Device of Orion security system;
PI – RS485 Interface Converter/Repeater w/ galvanic isolation (S2000-PI);
Figure 5.
RS485 Extension Using Interface Converter
4
RS-485 Line (no more than 3,000m)
A
B 0V
∞
Device
PI
isolated
A
A
620 620
B
B
GND
0V
Device
Device
A
A
∞
∞
B
B
0V
0V
1
2
PI
A
620 620
B
GND
Device
A
∞
B
0V
A
B 0V
3
620
Device
isolated
A
B
0V
Device
A
∞
B
0V
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Device
A
B
0V