11.3 ANALOG OUTPUT
For analog acquisition of the selected measuring point either an analog output
cable ZA 1601-RK (see manual 5.1.1) without electrical isolation or a relay
trigger analog adapter ZA 8000-RTA (see manual 5.1.3) with electrically
isolated analog output can be connected to the sockets A1 or A2.
Scaling
It is possible to spread any partial range to the standard output signal of the
three available options 0-2V, 0-10V, 0/4-20mA if the partial range covers at
least 100 digits (e.g. 0-20mA for +200.0 to +1000.0°C). To achieve this, the
required measuring range must be entered by using the functions ´Analog
Output Start´ and ´Analog Output End´ in the menu ´Special Functions´ (see
9.10.4).
These functions are also used to scale the line or bar chart.
Menu ´Special Functions´
Programming the analog output start:
AnalogStart: 0.0°C
Programming the analog output end:
AnalogEnd: 100.0°C
Selecting the Analog Channel
Usually, the measured value of the selected channel Mxx is output to the
analog output. However, in case of a continuous measuring point scan a
reference channel can be programmed allowing to define any channel for the
analog output to socket A2. A second analog output to socket A1,
simultaneously, outputs the measured value of the first channel of the selected
sensor (see manual 6.10.7).
Analog output of the selected measuring channel Mxx:
AnalogChann: Mxx
Analog output of the selected reference channel yy:
AnalogChann: yy
Programmed analog output (see below):
AnalogChann: M--
Programmed Analog Value Output
The analog value can also be programmed, manually or via interface, in a
range from -12000...+20000 digits (see manual 6.10.7). Depending on the
analog output the following output signals are available:
Voltage output
-1.2 ... +2.0 V
0.1mV/digit
Voltage output
-6.0 ... +10.0 V
0.5mV/digit
Current output
0.0 ...20.0 mA
1µA/digit
AnalogChann: M--
Output of 2.5V using the 10V output = 5000 digits:
AnalogVal: +05000
switching back to the measuring channel by using the key:
<OFF>
switching back to the previous programming value:
<ON>
64
ALMEMO
®
2590-9
Output Modules
