Toa VS-900 - Manual (Page 35)

35
12.7. VS-910RS Substation Interface Card Connection
RS-190 Substation and VS-910RS connection
The VS-910RS can be interfaced with up to 16 RS-190 Substations.
[Connection]
Use 2 pairs of twisted cables to connect the RS-190 and the VS-910RS. Refer to the following table for the
maximum recommended cable length between the two.
Cable type AWG24 (0.52 mm) AWG22 (0.65 mm) AWG20 (0.82 mm)
Distance 1 km 1.5 km 2 km
Connect as shown below.
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
Front view of
the circuit board
VS-910RS
RS-190
CN851
CN801
CN751
CN701
CN651
CN601
CN551
CN501
2 twisted pair cables
Line 1
Line 2
Line 4
Line 6
Line 8
Line 10
Line 12
Line 14
Line 16
Line 3
Line 5
Line 7
Line 9
Line 11
Line 13
Line 15
Lightening protector *
Lightening protector *
* In case of outdoor aerial wiring, install the
unit near the VS-910RS.
Note
The cable length for outdoor wiring must not
exceed 42 m (140 feet).
The wiring installation shall refer to NEC
Articles 725 and 800.
SW301
VS-910RS
Note
Never touch the SW301 switch
(factory-preset to OFF) on the
VS-910RS board.