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Cable Connections

Protective Earth Ground

Install protective earth ground per applicable codes (see diagram on page 16). This is located on the

back of the Maxum II and is secured with a M5 x 10 socket head screw (uses M4 hex).

Cable Connection using Steel Conduit System

Using flexible conduit and/or armored cable is equivalent to using “steel conduit.”

 The power wiring and the Ethernet wiring can be regular unshielded lines. The power wiring and signal

wiring (Ethernet and Data Hiway cables) must be routed in separate conduit.

 All DO lines with inductive loads must have transient suppression at the inductive load.

 Flexible conduit or armored cable must have its flexible conduit and/or armoring conductivity 360-

degree terminated at its entry to the Maxum II enclosure (or bulkhead.).

Cable Connection when conforming to CE / ATEX Requirements

Instructions

This section provides information on how to install Input/Output cabling to conform to maintain CE

conformance (Conformite European). This applies to most European Community (EC) installations.

Typically, this does not apply to users outside the EC unless the equipment was purchased with the

requirement that it shall conform to EC Electromagnetic and Radio Frequency Interference (EMI/RFI)

rejection specifications. The following information pertains to CE Installation for General Purpose, and

Zone 2 equipment. For Zone 1 Installations all I/O cabling is terminated in the APU relay box, externally

mounted to the Maxum II.

Cable Installation

All cables to the Maxum edition II must be shielded. The shield

must be 360-degree connected to ground only at one end,

normally at MAXUM's metal cable glands. The shield must end at

the cable gland. Mounting the cable to the cable gland:

 Loosen nut (2) of a suitable cable gland and remove the sealing

ring (1)

 Push cable into chromatograph as far as required

 Remove isolation and screen from end of cable up to screwed

gland. Expose 2 cm (1") of screen

 Connect screen around sealing ring (1) and tighten nut (2)

Signal Cable

 With Zone 2 analyzers or non-Ex analyzers connect the signal

cables via the metal cable glands to the chromatograph.

 With Zone 1 analyzers connect all signal cables, that can not

accidentally get voltage from outside (e.g. relay contacts), via the

metal cable glands to the chromatograph. With Zone 1 analyzers

connect all signal cables, that can accidentally get voltage from

outside (e.g. Ready, RS485, Ethernet)), to the cut off relay.

Power Cable

 Refer to the Application Drawing Package for specific

requirements and routing for the power cable.

 A shielded power cord or cable must be used for the input

power wiring.

 With Zone 1 & 2 analyzers connect the power cable at the APU

terminal block at the back-top of the assembly shown.

Note:

All DO lines with inductive loads must have transient suppression

at the inductive load.

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