Intra Automation digiflow 515, Installation And Operating Manual

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Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual
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9 Input circuits
The DigiFlow 515 have an adjustable supply voltage for transmitters. This voltage can be adjusted in a range
of approx. 17.5 -- 19.5V during configuration. A maximum output current of 100mA is allowed.
Of the rear side is a DIP switch accessibly. If the flow signal is a frequency signal, the signal type must here
be defined.
If the input signal is an analog signal, the DIP switch doesn't have any function.
9.1 Frequency signal
The DigiFlow 515 has an input signal-conditioning board, which can process most frequency signals of pres-
sure transmitters. By means of the DIP-Switch the correct flow signal will be selected.
The position of the DIP switches is in the following table in dependence of the input signal listed:
Input signal Terminal DIP - switch position
+ - 1 CH
1
2 CH
1
1 CH
2
2 CH
2
A
active impulse output with large ampli-
tude ( 12 ... 30 V) 13 17 off on off on
B
passive impulse output
(open collector, Reed switch, ... ) 13 17 on on on on
C active impulse output with small ampli-
tude (CMOS, TTL, ... ) 13 17 off off off off
The position of the DIP switch #2 is for passive signaling transmitters for channel 1 as same as for channel 2
without meaning.
General data:
max. input voltage: 35Vss
input impedance: A 30k
Ω
C 10k
Ω
e.g.: VORTEX, pre amplifier, magnetic
inductive flow meters
e.g.: Hall effect-sensors
13
17
CH1 CH2
ON
OFF
Fig. 1: Input signal Type 'C' (Sqare wave, CMOS or TTL)
13
17
CH1 CH2
ON
OFF
Fig. 2: Input signal Type 'B' Open Collector