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.
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).
RS-485 Line (no more than 3,000m)
A B 0V
Device
620
A B 0V
Device
A B 0V
Device
620
2
3
∞
1
Figure 4.
Connecting to RS485 Interface
Panel – S2000M Panel
Device – Device of Orion security system;
PI – RS485 Interface Converter/Repeater w/ galvanic isolation (S2000-PI);
A
B
0V
Panel
A
B
GND
A
B
0V
PI
620 620
isolated
A
B
0V
Device
∞
A
B
0V
Device
∞
A
B
0V
Device
∞
A
B
0V
Device
∞
A
B
GND
A
B
0V
PI
620 620
isolated
A
B
0V
Device
∞
A
B
0V
Device
6
2
0
Figure 5.
RS485 Extension Using Interface Converter
