A SERVICE OF

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2. WIRING
2-8
2.4 Junction Box (DS-640, option)
The optional Junction Box DS-640 permits extension of the cable connected between
the Junction Box and the Transceiver Unit up to maximum of 500 m. Fabricate two
TTYCY-4S and DPYCY-4 cables as shown below.
DS-640, internal view
120
30
7
Vinyl tape
TB1/TB2, TTYCY-4S
TB101, DPYCY-4.0
100
×3
10
60
30
Vinyl tape
10
DS-640 Junction Box
TTYCY-4S
DPYCY-4
8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
TTYCY-4S
TB1
TB2
TB101
1
2
1
2