Lauda P 10, Руководство по эксплуатации

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4.3.3 Connecting cable RS 485
Thermostat with 9-pin sub-D socket
Contact Data
1 Data A (-)
5 SG (Signal Ground) optional
6 Data B (+)
Note the following instructions:

Use protected connection lines.

Connect the protective screen with the connector shell.

The lines are galvanically separated from the rest of the electronics.

Do not connect unassigned pins.
An RS 485 bus always requires a bus connection in the form of a termina-
tion network that guarantees a defined standby state in the high-ohm phases
of bus operation. The bus connection looks like this:
This termination network is usually integrated in the insertable PC card
(RS 485) and activated via jumpers.
4.3.4 Protocol RS 485
Note the following instructions:

The interface works with 1 stop bit, without a parity bit and with 8 data
bits.

Transmission speed alternately: 2400, 4800, 9600 (factory setting) or
19200 baud.

The device address always precedes the RS 485 commands. Up to
127 addresses are possible. The address must always consist of three
digits (A000_... to A127_...).

The command from the computer must be made with a CR.

The response from the thermostatic circulator is always made with a CR.
CR = Carriage Return (Hex: 0D)
Example with set point transfer of 30.5 °C to the thermostatic circulator. In
this example, the address 15 is used.
Computer Thermostatic circulator
“A015_OUT_SP_00_30.5” CR
è
ç
“A015_OK” CR
Connection RS 485
Termination
Fig. 13: RS 485 termination
V6 PRO bath thermostats and circulation thermostats 35 / 156