Sailor AP5065 Installation Manual - page 18
16
Appendix A - The AUX interface
The AP5065 Alarm Panel is equipped with an auxiliary RS-422 line with a separate Rx and
Tx port, that can be connected to external equipment for monitoring of the Alarm Panel state.
The two ports are called the AUX-LISTENER (Rx) and the AUX-TALKER (Tx), and each has
an A and a B signal according to the RS-422 standard. There is also a “common ground”
connection denoted C.
Option
D-sub 25
1 and 14
AUX-TALKER B
2 and 15
AUX-TALKER A
3 and 16
AUX-TALKER C
5 and 18
AUX-LISTENER B
6 and 19
AUX-LISTENER A
7 and 20
AUX-LISTENER C
10 and 22
INTER L
11 and 23
INTER H
12 and 24
INTER C
13 and 25
INTER S
4.8.9 and 17
NC
Note:
The denotion ”1 and 14”, “2 and 15” etc. used in the table indicates, that the two pins
are internally connected. This will ease cabling when the unit is not an endpoint.
The communication on the AUX interface is compatible with parts of ISO/IEC 61162-1 (which
in turn is similar to NMEA 0183) although it should be noted that it is neither intended nor
approved as a full 61162-1 interface. It should be connected only to equipment ports that are
specifically dedicated to communicating with the alarm panel.
The configuration of the serial link and the basic data format is as stated in ISO/IEC 61162-1:
•
The link uses serial asynchronous communication with the bit rate 4800 bit/s, 8 data bits,
1 stop bit and no parity.
•
The data are sent as lines of ASCII characters with a checksum and terminated with a
Carriage Return and a Line Feed.
•
Each line form a “sentence” with the format
$aaccc,…,*hh
, where
is an
address field combined from a talker ID and a sentence code, and
is a checksum
in hexadecimal notation.
•
The checksum is calculated as a binary ‘exclusive OR’ of all the ASCII values of the
characters in the sentence. The opening dollar sign ‘
$
’ and the trailing asterisk ‘
*
’ are not
included in the calculation.
•
The Alarm Panel sends out ALR sentences on the TALKER port and accepts ACK
sentences on the LISTENER port.
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