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electrically isolated, including ALMEMO
8.2.1 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
relay 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
8.2.2 Trigger inputs
Trigger inputs P8 and P9 can be driven via optocouplers on the basis of volt-
age levels (4 to 30 V). When using floating switch contacts 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)
8.2.3 Analog outputs
In various options the module can also be fitted with electrically isolated ana-
log outputs, offering the following signals.
Option
OA 8006-R02
or
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
case be programmed as standard output 0 to 10 V, 0 to 20 mA, 4 to 20 mA for
Output signal
0.000 to +10.000 V
0.000 to +20.000 mA
8. Relay trigger analog module
®
clamp connectors.
Gain
0.5 mV / digit
1 µA / digit
21
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