Ahlborn ALMEMO 6290-7B, Operating Instructions Manual, Page: 16 / 53

4. CONNECTION OF THE TRANSDUCERS
Any ALMEMO
®
sensors can be connected to the ALMEMO
®
input sockets M1
and M2 of the measuring instrument (6). For connecting existing sensors it is
only necessary to connect a corresponding ALMEMO
®
connector.
4.1 Transducers
A detailed description of the comprehensive ALMEMO
®
sensor range (see
manual section 3) and the connection of existing sensors (see manual section
4) to the ALMEMO
®
instruments are provided in the ALMEMO
®
manual. All
standard sensors with ALMEMO
®
connector usually have the measuring range
and dimension already programmed and can be immediately connected to any
input socket. A mechanical coding ensures that sensor and output modules
can only be connected to the correct sockets. Furthermore, each ALMEMO
®
connector has two locking levers that snap in when the insertion into the socket
is established and that prevent a disconnection caused by pulling the cable.
Both levers must be pressed on the sides for disconnecting the connector.
4.2 Measuring Inputs and Additional Channels
The ALMEMO
®
6290-7B measuring instrument with built-in printer has two
input sockets, M1 and M2. However, ALMEMO
®
connectors can, if required,
provide up to 4 channels. The additional channels can be especially used with
humidity sensors with 4 measuring variables (temperature/humidity/dew
point/mixture ratio) or used for function channels. If required, the sensor can
also be programmed with several ranges or scalings or, depending on the pin
assignment, 2 or 3 sensors can be combined in one connector (e.g. rH/Ntc,
mV/V, mA/V etc.). The additional measuring channels of a connector are
located one level higher. As a result, the measuring instruments have the
following channel occupancy.
1
2
3
4
5 6
7
8
chann. 1
chann. 2
chann. 3
chann. 4
M1 M2
A2 A1
6290-7
15 ALMEMO

6290-7B
Connection of the Transducers