METSOmaxPAC Hardware Reference Guide

The maxDNA Input/Output System uses the Model APS Power Supply 

Assembly, which provides 24V dc power for Distributed Processing Units 

and I/O. This Power Supply Assembly consists of a 19-inch rack mount or 

flush mount chassis accommodating up to six independent 10 amp power 

supply modules. Metso Automation typically installs the power supply 

modules in an N + 1 redundancy configuration. Because each module is 

individually isolated, the chassis can be split to provide both system power 

and loop power. 

 Power supply features consists of the following: 

ƒ Redundant AC power inputs 

ƒ 250 Watt power supply modules 

ƒ Hot replaceable 

ƒ Current Sharing 

ƒ Power factor correction 

ƒ Front panel indicators on each module 

ƒ AC input 

ƒ Output voltage status 

ƒ Output current level 

ƒ External status signals 

Field Termination Options 

A maxPAC system uses three field cable termination approaches: 

Local Terminations Field cables terminate directly on the I/O 

module. 

Remote Terminations Field cables terminate on terminal blocks 

remotely to the I/O module with an 

interconnecting cable back to the I/O module. 

Termination Assemblies The QuadPAT, Turbine Valve and Overspeed 

modules require a DIN rail mounted termination 

assembly. Field cables terminate on this 

assembly with an interconnecting cable back to 

the I/O module. 

Local Terminations (standard) 

Each I/O module is supplied with two 16 point, “Euro-Style” screw clamp 

plugs that mate to the Printed Circuit Board Header on the module. Field 

cables would be routed directly to these Euro-Style plugs, which can accept 

up to a #12awg conductor. 

Remote Terminations (option) 

Many remote field cable termination options are possible. Listed below are a 

few examples: 

ƒ I/O in front of cabinet, terminations in the rear of cabinet. 

ƒ Termination cabinet mounted adjacent to I/O cabinet. 

ƒ Termination cabinet located remotely from I/O cabinet. 

The types of terminal blocks installed in the termination facility are too 

numerous to list; typically these terminations are DIN rail style. The cabling 

back to the I/O module is typically made using two multi-conductor cables, 

one to each of the Euro-Style plugs supplied with the individual I/O module. 

Termination Assemblies 

Part Number Description 

IOP337 QuadPAT Termination Assembly 

IOP342 Turbine Valve Termination Assembly 

IOP346 Turbine Overspeed 

CTO301 QuadPAT Module to Termination Assembly Cable 

CTO302 Turbine Valve Module to Termination Assembly Cable 

CTO303 Turbine Overspeed Module to Termination Assembly 

Cable 

Installing Model IOP I/O Equipment

This section covers the physical mounting and installation of the Model IOP 

I/O equipment. See "Module Mounting Considerations," before mounting 

any equipment. 

 The following tools and hardware are required: 

ƒ Screwdriver 

ƒ Hex Key Wrench, Metso Part No. 064598 

ƒ Mounting Screws, Metso Part No. 030162 (8 per unit supplied) 

ƒ Nut Retainers, Metso Part No. 003530 (8 per unit supplied) 

ƒ Crimp Tool for field connectors, Weidmuller Part No. 906480 

ƒ Crimp Contact Removal Tool, Weidmuller Part No. 906481 

Before mounting any hardware, see "Cabling, Power, and Ground Wiring." 

Sequence of Mounting Operations 

Mounting the parts of the Model IOP I/O in proper order can save time and 

duplication of effort. 

Follow this sequence as closely as possible for best results: 

1. Refer to field wiring instructions that can influence mounting locations 

for chassis assemblies and chassis assembly/module replacement. 

2. Mount the chassis assemblies; see "Mounting I/O Chassis Assemblies." 

3. Perform all steps as outlined in "Cabling, Power, and Ground Wiring." 

5. Complete field wiring. 

6. Refer to "Module Addressing" for switch settings and jumper selections. 

7. Install I/O modules. 

If your field wiring enters through the bottom of the cabinet, mount the 

Model IOP I/O units from top to bottom. This will make wiring of future 

units easier, since you will not have to pull wires from the bottom of the 

cabinet past existing Model IOP I/O units. This same reasoning applies to 

field wiring entering the top of the cabinet. Here you mount the Model IOP 

units from bottom to top. 

Mounting I/O Chassis Assemblies 

The Model IOP I/O chassis assembly attaches to the rear mounting rails in 

standard 19-inch maxDNA I/O cabinets. Three chassis styles are available. 

See “Chassis Assembly.” Up to seven chassis assemblies may be installed in 

a standard cabinets. 

Usually, the Model IOP I/O units are supplied already mounted in cabinets, 

but if you are mounting them yourself, follow this procedure. 

 Note: before you mount an I/O chassis, it should contain the I/O backplane.