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F-4600 With LCD Flow Meter Manual 06/18 - 2020-3 / 35874
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SECTION 8.0: AUXILIARY INPUTS AND OUTPUTS
8.1 DETERMINING AUXILIARY INPUT AND OUTPUT CONFIGURATION
The ONICON F-4600 can be configured from the factory to provide a variety of auxiliary input
and output configurations. Once configured at the factory, the function of the auxiliary terminal
cannot be changed. However, how the input is described on the LCD display, or how the output is
programmed, can be changed in the field during the commissioning process.
To determine how the auxiliary inputs and outputs are configured on your F-4600, reference the
model number string of your meter:
Meter Model Number Coding = F-4600-
AAA-BCD-EF
F = Analog & Pulse Input / Output Configuration
(Not field configurable)
6 = 1 analog output, 1 pulse input & 1 pulse output
9 = 1 analog output & 1 pulse output
8.2 AUXILIARY INPUTS
When configured with auxiliary pulse inputs, your F-4600 will be equipped with the ability to
bring in local dry contact and open collector pulses to be displayed on the F-4600 LCD screen as
well as the (RS485) output.
Input Rating:
For use with open collector sinking and dry contact pulse outputs only.
Pulse Duration – 50 ms minimum
Sinking Current – 10 mA maximum
The default LCD page description for each auxiliary input is “Counts.” This is because each pulse
is a count of an accumulated value from the remote device. The F-4600 allows for the user to
change this description through the commissioning process.
It is important to understand that the local aux input description on the F-4600 only appears
on the LCD display. The value transmitted over the (RS485) network will be a unitless count
regardless of the description programmed into the F-4600. The MODBUS memory map, which
describes the register locations for the aux input count and the coils to reset them to zero, are
located in section 7.1.
