TECHNICAL INFORMATION
How to connect the outputs of the controller
INPUT POWER CONNECTION ON THE MODEL
969-8972
The following figure shows a typical logic output
connection (relay coil) but any other device may
be connected e.g. a LED, a computer, etc., and
the related simplified circuit of the controller. The
figure example refers to the programmable set
point signal on pins 11 and 9.
The following figure shows the input power con-
nection relevant to the model n. 969-8972.
RS 232/RS 485 COMMUNICATION
DESCRIPTION
Both the RS 232 and the RS 485 interfaces are
available on the connector P2.
The communication protocol is the same (see the
structure below), but only the RS 485 manages the
address field. Therefore to enable the RS 485 is
necessary to select the type of communication as
well as the device address by means of the Navi-
gator software.
Typical output connection
P2 - Serial
Communication Format
•
8 data bit
•
no parity
•
1 stop bit
•
baud rate: 600/1200/2400/4800/9600 pro-
grammable
Communication Protocol
The communication protocol is a MASTER/SLAVE
type where:
This is a 9 pin D-type serial input/output connector
to control via an RS 232 or RS 485 connection the
TV 301.
•
Host = MASTER
•
Controller = SLAVE
PIN N.
SIGNAL NAME
1
+5 V (OUT)
2 TX
(RS232)
3 RX
(RS232)
4
A+ (RS422 Optional)
5 GND
6
A + (RS485)
7
B - (RS422 Optional)
8
B - (RS485)
9 RESERVED
The communication is performed in the following
way:
1. the host (MASTER) send a
M CRC
to
the controller (SLAVE);
2. the controller answer with an
CRC
to the host.
The
MESSAGE
is a string with the following format:
<STX>+<ADDR>+<WIN>+<COM>+<DATA>+<ETX>
+<CRC>
where:
Note that the vent valve can also be controlled by
means of the serial connection.
NOTE
When a data is indicated between two quotes (‘...’)
it means that the indicated data is the correspond-
ing ASCII character.
A serial communication kit with a serial cable and
the Navigation software is available (optional).
33
87-900-946-01(B)
