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5.1.1
Examples for connecting peripherals (Analog / HART version)
Active direct current output
Digital inputs
Abb. 18
Active DC output
The mA analog output is HART-enabled if configured as a '4 ... 20 mA output'.
Passive digital outputs, optocoupler
The passive digital outputs D
(see Abb. 18). They can be used as a binary contact as well as a pulse and frequency output.
The maximum current must be limited to 100 mA by means of series resistor R
As far as digital output 1 is concerned, terminals 16 (D
connected in accordance with the diagram shown above. Terminals 17 and 18 should be used
for digital output 2. The 24 V voltage at terminals 14 and 15 can be used as the voltage source
for the open-collector circuit.
Digital inputs
Digital inputs are used for switching over the characteristic curve within the device or for
controlling the totalizer.
A 24 V input signal can be defined as 'HIGH' or 'LOW', depending on the polarity of D
D
2.
in
IMPORTANT (NOTICE)
The connection area for the explosion-proof designs in accordance with ATEX Zone 0 / 1 / 21
and FM is described in chapter 'Ex relevant specifications' on page 50.
IMPORTANT (NOTICE)
It is not possible to operate the Sensyflow FMT500-IG in multi-drop or burst modes.
CI/FMT500-IG-EN
Passive digital outputs, optocoupler
Can be used as frequency, pulse or contact output
*) R
≤ U
/ I
B
ce
ce
1 and D
2 need to be connected as open-collector outputs
out
out
Sensyflow FMT500-IG
Electrical connections
.
B
1) and 18 (GND D
out
out
) should be
1 and
in
EN - 31
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