Ingersoll-Rand X41 technical manual Input Functions

Consult the air compressor manual or your air compressor supplier/specialist for details before installing the X4I.

Each air compressor must be equipped with an online/offline pressure regulation system capable of accepting a remote load/unload signal through a volt free switching contact or a single electro-mechanical pressure switch.

The IR-PCB accepts a 12V to 250V input voltage detection system and utilizes universal relay contact control outputs (250V “CE” / 115V “UL” @ 5A maximum) integrated directly into the circuits of an air compressor. The IR-PCB avoids the need for additional relays or remote inputs. The IR-PCB also acts as an electrical barrier between the compressor and the X4I providing protection and voltage isolation.

Consult the X4I Interconnect and Application Guide prior to the installation of the X4I and the IR-PCB to the air compressor.

INPUT FUNCTIONS

The IR-PCB is fitted with a six-pin terminal, C04, for compressor monitoring. The IR-PCB uses two inputs, Ready and Run, to determine compressor status. An alarm input can be used if compressor warning indication is available and required. The alarm input is optional and is not necessary for system operation.

READY INPUT

The ‘Ready’ connection is intended to indicate that the compressor is in a “started” state, has no alarm condition that has shut down the compressor, and is ready to respond to X4I regulation without manual intervention.

READY LAMP 0V

+V

ALARM RUN READY

C04

Typical Ready Input Wiring

The READY input will accept 12V to 250V ac (50/60Hz) or dc.

Do not connect a voltage greater than 250Vac/dc to this input.

This input must be connected to a circuit of the compressor control system that will be energized when

the compressor is in a started (standby or running) condition. For example, locate the circuit across the ready or operating lamp as shown.

The voltage to this input must de-energize when the compressor is stopped and unavailable to produce air upon a load signal, or the emergency stop button is pressed, or when the compressor experiences a fault that prevents the compressor from running.

When the compressor ready lamp or other control circuit is energized, the IR-PCB will detect the voltage and signal the X4I that the compressor is ready and available to load and produce air when a load request signal is given.

The IR-PCB common input terminal must always be connected to the neutral, common or 0V line of the applied input voltage.

READY INPUT, ALTERNATIVE CONNECTION METHOD

In instances where a convenient voltage signal for a compressor ready condition is not available, the “ready” input can be connected directly to a constant compressor control voltage (12V to 250Vac or dc). This will signal the X4I that the compressor is ready and available at all times when power is applied to the compressor. The X4I has a built-in function to determine when a compressor is not responding, or is in a shutdown condition, even if the “ready” signal says otherwise. If the X4I requests a compressor to run/load, but fails to detect a RUN signal within 60 seconds, the X4I will regard the compressor as “not ready” and indicate the compressor as not available. If a RUN signal is reacquired at any time, the X4I will automatically reset the compressor “not ready” condition and re-establish control.

+Vac

F1

0Vac

READY

Alternative Ready Signal Connection

Never connect the “Ready” input positive voltage connection directly to the output of a control system transformer. Always connect after a fuse or circuit breaker.

If a normally closed contact of an emergency stop button is included in the compressor power supply circuit, connect after the emergency stop button contacts. This will instantly indicate a compressor “not ready” condition if the emergency stop button is activated.

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