Toa VS-900 - Manual (Page 44)

44
12.11.3. Connection to the VS-900TI
Connect each connector of the unit's Voice Lines 1 – 4 to the corresponding connector on the VS-900TI's CN
1 – 4. Pins No. 1 and 2 of each connector of Voice Lines 1 – 4 are for receiving ends, while pins No. 3 and 4
are for transmitting ends. Use 2 twisted pair cables for connection as shown below.
2 twisted pair cables
CN1
CN2
CN3
CN4
CN6
Line 1
Line 2
Line 3
Line 4
Data line
RS-485
A
B
GND
GND
VOICE LINE1
1 2 3
VS-900TI
Front view of
the circuit board
1 2 3 4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
VS-900SC (figure of the inside of the front panel)
• For the VS-900TI, cut SJP of each line to be connected.
Line 1: LINK1-1 (SJP13) and LINK1-2 (SJP14)
Line 2: LINK2-1 (SJP15) and LINK2-2 (SJP16)
Line 3: LINK3-1 (SJP17) and LINK3-2 (SJP18)
Line 4: LINK4-1 (SJP19) and LINK4-2 (SJP20)
VS-900TI
LINK1-2 (SJP14)
LINK2-2 (SJP16)
LINK3-2 (SJP18)
LINK4-2 (SJP20)
LINK1-1 (SJP13)
LINK2-1 (SJP15)
LINK3-1 (SJP17)
LINK4-1 (SJP19)