Function Description; Analogue Outputs; Overview; Using An Analogue Output To Regulate A Gov/Avr - Deif AGC-4 Mk II Quick Start Manual

2. Function description

2.1

Analogue outputs

2.1.1

Overview

The analogue outputs are active and galvanically separated. No external supply can be connected.
The current outputs can be converted to any voltage in the range ±10 V DC by mounting a resistor across the terminals.
Resistor example
A 400 Ω resistor across the terminals of the ±25 mA output supplies ±10 V DC.
NOTE The choice of resistor depends on the governor. Place the resistor at the governor/AVR end to avoid the signal
being disturbed by noise. For more information, see Interfacing DEIF Equipment with Governors and AVRs and
General Guidelines for Commissioning.
2.1.2

Using an analogue output to regulate a GOV/AVR

You can use an analogue output to regulate a governor or AVR.
Governor analogue output setup example
To set up transducer 68 of option EF6 to transmit the governor set point as a 0 to 20 mA signal:
In Reg. output GOV, menu 2781, for Set point, select Analogue.
In Governor output, menu 5981, for Transducer A, select Transducer 68.
In AOUT 68 Limits, menu 5781, select the minimum limit, that is, 0 mA.
In AOUT 68 Limits, menu 5782, select the maximum limit, that is, 20 mA.
Output limits
You can limit the analogue output's maximum and minimum output if the full range is not needed. This can especially be
useful when using the analogue output for governor control, since some governors only accept a specific voltage range.
In the following example, analogue output 68 with a standard output of ±25 mA (option EF6) is limited to an output of 0 to
20 mA to be used for governor control.
Options E F AGC-4 Mk II 4189341277C EN Page 6 of 10