Unit description
6
3.7
Serial Interfaces RS 232, RS 485
3.7.1
Specification and interface test
Computer
Thermostat
Data
9-pin sub-D
socket
25-pin sub-D
socket
9-pin sub-D socket
Data
①
②
①
②
①
②
R x D
2
2
3
3
2
2
T x D
T x D
3
3
2
2
3
3
R x D
DTR
4
20
4
DSR
Signal
Ground
5
5
7
7
5
5
Signal Ground
DSR
6
6
6
DTR
RTS
7
4
7
7
CTS
CTS
8
5
8
8
RTS
☞
①
with Hardware Handshake: When connecting the thermostat to the computer please
use a 1:1 cable and not a zero-modem-cable!
②
without Hardware Handshake: The computer needs an operating mode: ”without
hardware handshake”. In the plug of the thermostat a bridge has to be inserted between
Pin 7 and 8.
Thermostat
RS 485 interface
9-pin sub-D-socket
pin
Data
1
Data A
5
SG (Signal Ground)
optional
6
Data B
☞
−
Use shielded connecting cables.
−
Connect the shielding to the plug case.
−
Cover unused connectors with protection caps!
−
The lines are electrically isolated from the remaining electronics.
−
Unoccupied pins must not be connected!
Содержание Ecoline RE 204
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