Siemens Cerberus PRO FC721 - Serial Module Installation and Pin Assignments; Serial Module Mounting Steps; RS232 and RS485 Pin Assignments

Mounting
Options
5
36 | 118
Building Technologies
A6V10211100_f_en_
--
Fire Safety
2015
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12
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15
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 wiri
ng inside the housing only.
Pin assignments
The serial modules are connected as follows:
● RS232 module: X3 DTE-HOST
● RS485 module: X2 connector
5.5.2.1 X3 DTE HOST on RS282 module
Pin Designation Description
8 ← DCD Data Carrier Detected
7 ← DSR Data Set Ready
6 ← CTS Clear To Send
5 0 V Ground
4 ← RXD Received Data
3 DTR → Data Terminal Ready
2 TXD → Transmitted Data
1 RTS → Ready To Send
Admissible cable cross-section: 0.2…1.5 mm²
T Participant with RS232 interface
X3
6
5
7
8
RTS
TXD
DTR
RXD
0 V
CTS
DSR
DCD
DTE-HOST
T
1
2
3
4