Atlas Copco APF221384, Original Instruction Book

Page: 22 / 86

Ref. Designation
(10) Indirect stop offset
If the motor is running at minimum speed and the net pressure rises to a value equal to the sum
of the programmed pressure set-point and the programmed indirect stop offset, the compressor
will stop.
When the net pressure drops, the regulator will calculate the optimum moment to restart the
compressor to avoid the net pressure decreasing below the pressure set-point (anticipated
starting).
Direct stopping
If the net pressure should rise to a value equal to the sum of the programmed pressure set-point
and the programmed direct stop offset, the compressor will be stopped immediately.
The regulator will calculate the optimum moment to restart the compressor.
3.2 Digital output contacts
Warning
Voltage-free outputs may only be used to control or monitor functional systems.
They should NOT be used to control, switch or interrupt safety related circuits.
Stop the compressor and switch off the supply before connecting external equipment.
Check the
Safety precautions.
Connections for external equipment
The Elektronikon (Mk5) always comes with expansion module IO2 that has a number of digital
output contacts which can be used to connect external equipment.
Depending on the optional equipment, extra expansion modules are added to the machine
configuration (IO2, IO34).
Instruction book
20 APF221384