Memmert HPP 108/749 Constant climate chamber (Generation 2003) - Manual (Page 51)

51
Advanced functions
7.6.2 Communication interfaces RS232/RS485 (optional)
The chamber can be optionally equipped with a RS232 serial communication interface in ac-
cordance with DIN 12900-1 or a RS485 interface, instead of a USB interface ( Fig. 29 and Fig.
30 ).
► With the RS232 interface, it is possible to control and log the chamber remotely from the
computer. If several chambers are to be connected to a computet via RS232 interface, an
appropriate interface on the computet and a separate cable are required for each cham-
ber. The maximum cable length is 15 m.
► The RS485 interface enables the networking of several chambers (up to 16) with one
computer via a shared two-wire cable. The computer needs to be equipped with either a
RS485 interface or with an RS232/RS485 adapter.
► Connecting the wires is done individually with a shielded cable, depending on the installa-
tion site. The maximum total cable length is 150 m.
RS232
RS485
Interface converter
Fig. 29 PC RS 485 connection with adapter Fig. 30 PC RS 232 connection
In both cases, each chamber must be given a unique device address in the SETUP submenu,
menu item ADDRESS (see page 42 ), via which the computer communicates with the chamber.
The default setting is ADDRess 0. Using this address, the appropriate oven can be selected and
programmed from the computer.
The chamber can be connected to the computer using a shielded interface cable. The shield-
ing must be connected to the plug casing.
If the serial port is not used, put on the cover included.