Ahlborn ALMEMO 2290-4 V5, Руководство по эксплуатации, Страница: 15 / 48

4. CONNECTION OF THE TRANSDUCERS
Any ALMEMO
®
sensors can be connected to the ALMEMO
®
input sockets (2)
M0 and M1. 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 measuring instrument ALMEMO
®
2290-4 has 2 input sockets (2), M0 and
M1 that the measuring channels M0 and M1 are initially allocated to. However,
ALMEMO
®
sensors can, if required, provide up to 4 channels so that 20
channels are available with 5 input sockets. 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 each. As a result, the following
channel assignment is available.
0
1
2
3
4 5
6
7
chann.1
chann.2
chann.3
chann.4
M0 M1
A2 A1
2290-4
ALMEMO

2290-4 15
Connection of the Transducers