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15 Base Load Sequencing (BLS) (Optional)
Gardner Denver
66
Caution
Do not connect voltages of more than 250 V.
If the voltage exceeds 250 V, an auxiliary
contact must be used to switch a suitable
voltage to the inputs.
The inputs may only be connected to power
circuits with appropriate fuse protection.
a) Digital input “Operation”
A signal must be connected to this input to indicate that
the compressor is ready to produce compressed air
after sending a remote load signal.
For compressor controls which do not have such signal,
the input can be connected to the collective fault signal
of the compressor.
This will indicate to the GD Pilot TS Master that there is
no fault at the compressor.
b) Digital input “Motor”
Contacts A1 and A2 of a main contactor coil can be
connected directly to this input.
If the compressor controller energises the coil of the
main contactor, the compressor module detects the
voltage over the coil and notifies the master that the
motor is running.
For compressor controllers without a main contactor,
any output can be used which indicates that the motor
is running, e.g. a fan contactor or a soft starter signal.
c) Digital input “On-load”
The regulation valve coil can be connected directly to
this input.
If the compressor controller energises the coil of the
regulation valve, the compressor module detects the
voltage over the coil and notifies the master that the
motor is on load.
Any output which indicates that the compressor is on
load could also be used.
Digital outputs
Danger
When a compressor module (STD) is installed, the
compressor's pressure switch can no longer
provide over-pressure protection.
For compressors that are not equipped with
independent over-pressure detection, we
recommend that a pressure switch be incorporated
in the compressor fault circuit(s) to ensure that any
local over-pressure condition will stop the
compressor independently from the GD Pilot TS
Master.
The compressor is controlled by two or three digital
outputs. The status of these outputs is indicated via
three LEDs.
These digital outputs are change-over contacts and can
be adapted to the requirements of the compressor
controller by selecting the appropriate terminals.
a) Digital output “Remote load enabled”
Do not use this output to switch the compressor on and
off.
This output should cause a change-over from internal
regulation to control via the digital outputs of the
compressor module.
b) Digital output “Remote load”
Do not use this output to switch the compressor on and
off.
This output switches the compressor on load.
This remote load signal should be active when the
“Remote load enabled” output is sent to the compressor
controller.
c) Digital output “Remote half load”
This output is not used for this application.