Ingersoll-Rand X41 technical manual C02

compressor number) with an additional wire. Use a 7- conductor shielded cable in this instance.

Compressors that use electronic pressure detection but are not equipped with a remote pressure control enable feature will not automatically revert to local control if the X4I is stopped or experiences a fault or loss of power.

+VDC	+VDC
VFD/Fixed
Load Enable
Load/Unload	VFD/Fixed
	Load Enable
	Load/Unload

ir-PCB

Load, Sequence, and VFD Connections

Compressor controller inputs common voltage may be 0V or +V.

The local/remote pressure regulation input and/or remote load input logic of some electronic pressure sensor type controllers are reversed. In this instance, the “pressure switch” outputs (terminal C02) can be used to establish alternative logic control connections.

For Example:

If the compressor controller “Local/Remote Pressure Control” input is a normally open type (local when open, remote when closed), but the “Remote Load” input is a normally closed type (load when open), the IR-PCB pressure switch terminal contacts can be used to achieve the correct switching logic.

functions are internally connected and a short circuit condition and/or malfunction may result.

The IR-PCB connection examples shown in this manual are intended to provide a guide for the majority of compressor control systems in use. Some compressors have variations in operation and/or function; consult your compressor supplier/specialist for advice.

SERVICE MAINTENANCE SWITCH

The IR-PCB is equipped with a volt-free input (terminal C05) that can be used to remove the compressor from X4I control, without generating a fault condition, during short-term maintenance or servicing periods.

	1
C05	2

Service Maintenance Switch Circuit

When the “Service Maintenance Switch” input terminal pins are connected together using a volt-free switching contact, the X4I will indicate that the compressor is not available but will not generate a warning, alarm, or shutdown condition. The X4I will also remove the compressor from the sequence strategy and substitute with an alternative available compressor if necessary. When the “Service Maintenance Switch” input circuit is open again, the compressor will automatically be accepted back in to the sequence strategy and will be utilized when next required.

The use of a “key switch” is recommended for this purpose in order to prevent the switch contacts being inadvertently left in the closed circuit condition after service maintenance is complete.

DO NOT connect any external voltage source to the pins of terminal C05.

C02

NO

OUT C

NC

NO

IN C

NC

Local/Remote common

Remote Load common

AUXILIARY INPUT (OPTION)

The X4I is equipped with an auxiliary input at terminals 31 and 32 (X07).

The function of the input is menu selectable and can be adapted for differing application requirements.

X07

Alternate Logic

Examine the “i-PCB” internal output circuit diagram to establish any desired switching logic that may differ from normal practice.

Do not attempt to utilize “Digital Pressure Regulation Control” (terminal C01) and the “Pressure Switch Control” (terminal C02) output connections at the same time for different products. These two output

32

31

Auxiliary Input Circuit

The input is designed to detect a remote “volt-free” switching contact (rated for a minimum 24VDC @ 10mA).

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