Memmert PM 200/400/500 Pump Module (Generation 2003) - Manual (Page 43)

VO
Muster
page 43
25.3 Bus interface RS485 (option)
When so ordered, the oven can be equipped at the factory with an RS485 interface instead of the RS232C
interface. This permits networking of several ovens (up to 16) with a single PC using a common 2-wire circuit.
The system is operated using the “Celsius 2007” software. A unique device address has to be assigned to
the oven in sub-menu SETUP, option ADDRESS. This is the address through which the PC communicates with
the oven. The default setting is ADDRess 0. Using this address each oven can be addressed by the PC and
programmed.
For this purpose the PC must be equipped with an RS485 interface or must be fitted with an RS232/RS485
converter. The cabling has to suit the individual location using a screened cable. The maximum total length
of the cable is 150 m.
A maximum of 16 devices can be addressed on the RS485 bus. A termination resistance of 220 Ohm has
to be connected to the last device.
RS 485
9-pin serial
1 2 3 4 5
6 9 8 7
1 2 3 4 5 6 7 8 9
not used not used A not used not used not used not used B not used
RS485
RS232
Converter