Memmert TTC 256 Temperature test chamber (Generation 2003) - Manual (Page 55)

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Advanced functions
7.6 Communication interfaces
Depending on the specifications, the test chamber can be fitted with different communication
interfaces (USB, RS 232/485, Ethernet). These are located on the left side of the appliance, in
the base (see Fig. 3 on page 10 and Fig. 4 on page 11 ).
7.6.1 USB interface
The chamber is fitted by default with a USB interface in accordance with the USB specification.
With this interface, it is possible to control and log the chamber remotely from the PC. This is
done with the help of the “ Celsius” software.
To do so, the chamber must be given a unique device address in the SETUP submenu, menu
item ADDRESS, via which the PC communicates with the chamber. The standard setting is
ADDRess 0. The climatic chamber can be selected and programmed with this.
If several chambers are to be connected to a PC via USB interface, an appropriate interface on
the PC and a separate cable are required for each chamber.
The maximum cable length is 5 m.
7.6.2 Communication interfaces RS232/ RS485 (optional)
Instead of a USB interface, the chamber can be optionally equipped with an RS232 serial com-
munication interface in accordance with German standard DIN 12900-1 or an RS485 interface.
► With the RS232 interface, it is possible to control and log the chamber remotely from the
PC. If several chambers are to be connected to a PC via RS232 interface, an appropriate
interface on the PC and a separate cable are required for each chamber. The maximum
cable length is 15 m.
► The RS485 interface enables the networking of several chambers (up to 16) with one PC
via a shared two-wire cable. The PC 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 installation site. The maximum total cable length is 150 m.
In both cases, each chamber must be given a unique device address in the SETUP submenu,
menu item ADDRESS (see Chapter 7.2 ), via which the PC communicates with the chamber. The
standard setting is ADDRess 0. Using this address, the appropriate oven can be selected and
programmed from the PC.
The test chamber can be connected to the PC using a shielded interface cable. The shielding
must be connected to the plug casing.
If the serial port is not used, put on the cover included.