Installation Instructions

Connect external components
Desk call station extension PTO2001-A1
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7.2.4 Connect RS232
The PTO2001-A1 has two RS232 connectors. One ('CN4') is used to connect
PT2001-A1, and the other ('CN3') is used to communicate with the next PTO2001-
A1.
RS232 connector 1 - 'CN4'
Pin
Description
Remark
1
RX
-
2
TX
-
3
GND
-
Table 79: PTO2001-A1 RS232 connector 1 - 'CN4'
RS232 connector 2 - 'CN3'
Pin
Description
Remark
1
GND
-
2
TX
-
3
RX
-
Table 80: PTO2001-A1 RS232 connector 2 - 'CN3'
To connect RS232 on the first PTO2001-A1, connect the 'RX' on the PT2001-A1 to
'TX' on the PTO2001-A1, 'TX' to 'RX', and 'GND' to 'GND'.
Connect the next PTO2001-A1 RS232 to the previous PTO2001 by 'RX' – 'RX',
'TX' – 'TX', 'GND' - 'GND'.
Fig. 54: PTO2001-A1 connection to PT2001-A1
1
1
CN4
CN1
RS232-1
Power-1
DC 24 V
1
CN3
RS232-2
1
CN2
Power-2
DC 24 V
1
1
CN4
CN1
RS232-1
Power-1
DC 24 V
1
CN3
RS232-2
1
CN2
Power-2
DC 24 V
1
1
1
1
1
1
CN1
CN5
CN2
CN7
CN4
CN3
SD-Slot
Power
DC 24 V
RS232
GND
RX
TX
GND
RX
TX
GND
RX
TX
24 V
0 V
PT2001
PTO2001
PTO2001