Interface elements and options
electrically isolated, including ALMEMO
®
clamp connectors.
9.2.1 Relays
The output relays are driven by means of interface commands or in the event of
alarm automatically by the system. (see Manual, 6.10.10) The function of each
relay can be freely set by configuration. (see 12.6.2) The assignment of a limit
value to a relay can be programmed in the sensor by the device. (see 12.4.3)
Whenever a relay is activated a short acoustic alarm is sounded. The way in
which these relays are driven can be configured as inverted so that they pick up
in normal conditions and drop out in the event of alarm or power failure.
In the following cases it is advisable to connect a mains voltage changeover re-
lay downstream (e.g. Phoenix PLC-RSC-24DC/21, 250V 6A).
► Current or voltage capacity greater than 50 V, 0.5 A
► For separating the mains voltage side
► For the realization of an alarm failure of the control side
9.2.2 Trigger inputs
Trigger inputs P8 and P9 can be
driven via optocouplers on the ba-
sis of voltage levels (4 to 30 V).
When using floating switch con-
tacts the optocouplers must be
appropriately wired with supply
U+ and U-. (see diagram)
The trigger function (as standard to start or stop a measuring operation) can
also be freely configured. (see 12.6.2)
9.2.3 Analog outputs
In various options the module can also be fitted with electrically isolated analog
outputs, offering the following signals.
Option
Output signal
Gain
OA 8006-R02
0.000 to +10.000 V
0.5 mV / digit
or
0.000 to +20.000 mA
1 µA / digit
The output value normally corresponds to the measured value for the selected
measuring point. Or alternatively the analog value can be specified as control
variable via the interface. (see Manual, 6.10.7) The output signal can in each
ALMEMO
®
5690-2M
25