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Siemens Cerberus PRO FC721 Technical Manual page 36

Fire control panel
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Mounting
5
Options
5.5.2.1 X3 DTE HOST on RS282 module
36 | 118
Building Technologies
Fire Safety
Mounting steps
1. Mount the cable gland (5) with the nut (4) on the flange between the fastening
tabs (3).
2. Plug the serial module (1 or 6) into the corresponding connector (X14 or X19).
3. Secure the serial module to the fastening tabs (4) using the two screws (2).
4. Wire up the serial module with the intended components according to the pin
assignment.
Cable glands do not have to be fitted for wiring inside the housing only.
Pin assignments
The serial modules are connected as follows:
RS232 module: X3 DTE-HOST
RS485 module: X2 connector
Pin
Designation
8
← DCD
7
← DSR
6
← CTS
5
0 V
4
← RXD
3
DTR →
2
TXD →
1
RTS →
Admissible cable cross-section: 0.2...1.5 mm²
DTE-HOST
DCD
DSR
CTS
0 V
RXD
DTR
TXD
RTS
T Participant with RS232 interface
Description
Data Carrier Detected
Data Set Ready
Clear To Send
Ground
Received Data
Data Terminal Ready
Transmitted Data
Ready To Send
X3
8
7
6
5
T
4
3
2
1
A6V10211100_f_en_--
2015-12-15

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