ECO GOLD
28.04.10/ YACE0088
Interface modules
69
8.4.2
RS 232 protocol
−
The interface operates with one stop bit, no parity bit and with eight data bits.
−
Transfer speed alternatively: 2400, 4800, 9600 (factor setting) or 19200 baud.
−
The RS 232 interface can be operated with or without hardware-handshake
(RTS/CTS).
−
The command from the computer must be terminated with a CR, CRLF or LFCR.
−
The response from the thermostat is always terminated with a CRLF.
CR = Carriage Return (Hex: 0D)
LF = Line Feed (Hex: 0A)
Example:
Set-value transfer of 30.5 °C to the thermostat
Computer
Thermostat
„OUT_SP_00_30.5“CRLF
Ö
Õ
„OK“CRLF
8.4.3
RS 485 connecting lead
Thermostat
9-pole Sub-D socket
Contact Data
1
Data A (-)
5
SG (Signal Ground)
optional
6
Data B (+)
−
Use screened connecting leads.
−
Connect screen to the plug housing.
−
The wires are electrically isolated from the rest of the electronics.
−
Non-assigned pins should not be connected.
An
RS 485 bus
requires essentially a bus termination in the form of a terminating network, which
provides a defined idle state in the high impedance phases of bus operation. The bus termination is
as follows:
Generally, this terminating network is integrated on the PC plug-in card (RS 485).
Summary of Contents for RE 1050 G
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