5.15 Open-Collector output “A1” (status / tacho)
Open-Collector pulse output for status display or speed display.
Status display (function for factory setting)
Depending on the operating state of the device, the output “A1” is switched to
GND potential for a certain number of pulses.
The status of the device can be displayed by this digitally coded signal.
With the output voltage “+10 V” a standard LED / low-power LED can be
controlled by using a pull-up resistor.
This lights when the output “A1 Status Out OC” (OC = Open-Collector) is on GND
potential.
The details of which pull-up resistor needs to be used depend on the specification
on the LED that is used.
Explanation of flash codes
Diagnostic / Status Out with flash code.
Pull Up
10V
A1
GND
06.11.2013
i_ecblue_a1_status_oc.eps
200...300 Ω
Tacho out
Alternatively, via output “A1”, the current motor speed can be output.
The frequency (duty cycle 50 : 50) that can be measured by a pull-up resistor at
the output “A1” corresponds to the motor speed.
Example: 10 Hz x 60 = 600 rpm
Pull Up
10 V
A 1
GND
Hz
n = f x 60
5 kΩ
06.11.2013
i_ecblue_a1_tacho_oc.eps
200...300 Ω
A1 more specifications
Technical data!
5.16 Potential at control voltage connections
The connections for the control voltage (< 30 V) relate to the common GND potential (exception: relay
contacts are potential-free). There is a potential isolation between the connections for the control
voltage and the PE conductor. It must be ensured that the maximum external voltage at the con-
nections for the control voltage cannot exceed 30 V (between the “GND” and “PE” conductor
terminals). A connection to the PE conductor potential can be made if required; fit a bridge between
the “GND” terminal and the “PE” connection (terminal for shield).
Assembly instructions ECblue Electrical installation
L-BAL-F055D-GB 2021/51 Index 006 Part.-No.
26/56
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