Connect 'Pace-Bus' (Rs485); Connect Analog Audio Inputs; Connect Analog Audio Outputs; Table 41: Pto2008-A1 'Pace-Bus' (Rs485) Connector - 'X2 - Siemens Cerberus PACE Compact Installation, Mounting

6 Install internal components
Call station interface (RS485) PTO2008-A1

6.3.4 Connect 'PACE-Bus' (RS485)

6.3.5 Connect analog audio inputs

6.3.6 Connect analog audio outputs

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The PTO2008-A1 provides one 'PACE-Bus' (RS485) connector ('X2').
'PACE-Bus' (RS485) connector - 'X2'
Pin Description
1 D-
2 D+
3 GND
4 -

Table 41: PTO2008-A1 'PACE-Bus' (RS485) connector - 'X2'

The PTO2008-A1 provides one connector ('X3') for analog audio inputs connected
to the call station microphone.
Analog audio inputs connector - 'X3'
Pin Description
1 SI+
2 GND
3 SI-

Table 42: PTO2008-A1 analog audio inputs connector - 'X3'

The PTO2008-A1 provides one connector ('X4') for analog audio outputs
connected to the call station speaker.
Analog audio outputs connector - 'X4'
Pin Description
1 SO+
2 GND
3 SO-

Table 43: PTO2008-A1 analog audio outputs connector - 'X4'

Remark
RS485 data -
RS485 data +
GND reference voltage
Not used
Remark
Audio-In +
GND reference
Audio-In -
Remark
Audio-Out +
GND reference
Audio-Out -
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