MOOGUser Manual M3000® Control System QAIO 16/4 Analog I/O Extension Module

Function The module is used to expand the analog I/O level of Cell Controllers.

The modules are connected by direct E-bus coupling and is available with voltage

or current inputs.

Features

Common characteristics

4 analog output channels

in the form of voltage outputs, +/-10 V (GND sensing)

resolution 11 bit + sign

1 reference voltage output +10 V

Low space requirements and low mounting depth.

The modules with voltage or current inputs also have the following features:

Module with voltage inputs:

16 analog voltage input channels,

suitable for connecting active and passive resistors.

voltage rating, differential +/-10 V

measured value resolution 11 bit + sign

Module with current inputs:

16 analog current input channels,

current rating, 0... 20 mA

measured value resolution 11 bit + sign

Lieferumfang Supplied with the module package is:

An analog I/O expansion module with voltage or current inputs.

Shielding and measurement cabling

Reliable operation of higher-precision analog components with fast conversion

times can only be achieved in an industrial environment with the help of corresponding shielding measures and the correct metrological cabling. The user must,

in this regard, observe the interaction of all the analog components and their auxiliary power supplies throughout the entire system.

Mounting the module The module must always be mounted in shielding (metal) switch cabinets/casings.

Adequate isolation of interfering components and their cabling must be ensured

within the casing by means of appropriate constructive measures (e.g. separate

wiring, spatial separation of components).

Low-frequency

interference voltages Low-frequency interference voltages, such as the omnipresent 50 Hz network

crosstalk, are cancelled out by the module’s differential measuring system in conjunction with high common-mode rejection.

High-frequency

interference voltages High-frequency and pulse interferences have to be kept away from the signal lines

by means of suitable shielding measures.

For this purpose, the line shields in the field (outside the casing) must be connected

on both sides. The best results are always achieved when the cable shields are laid

flat at the points where they enter the casing.

Note:

Experience shows that the environmental conditions within systems and equipment can change sporadically and unexpectedly.

Even if seemingly good results can be attained in a number of cases using open

wiring, we advise strongly against it.

Failure to implement the measures referred to can result in lengthy error diagnostic processes and high consequential costs.

Users that implement the recommendations set out in this manual in a consistent

manner will not encounter problems regarding current EMC directives.

CE mark When designing the module, we attached great importance to its electromagnetic

compatibility. Nonetheless, a considerable proportion of the action that must be

taken in order to ensure reliable operation are outside our sphere of influence.

For this reason, we have opted not to affix the CE mark to this automation component. In this regard we would like to draw users’ attention to their overall responsibility when incorporating the module into their applications.

Operation of the module

Warning ! Do not insert, apply, detach or touch connections when in operation!

Destruction or malfunctioning may otherwise occur. Disconnect all incoming supplies before working on modules, including those of connected peripherals such as

externally supplied sensors, programming devices, etc.

The module is designed for measuring and control functions located on a common

potential island.

Items of equipment on differing potential levels can be connected via suitable isolation devices (insulating amplifier etc.).

Note:

The module electronics power supply (connection voltage +24VDC) is not electrically isolated from the analog connections on the module. The negative connection point for the incoming supply (M1) is physically connected to the analog earth

connection (AGND).

We recommend that all sensors/actuators be operated on this supply together with

the module.

Consciously arranging analog wiring with a common earth is good practice.

The module is designed to cope reliably and effectively with the small differences

of potential unavoidably occurring when sensors and actuators are supplied jointly

through appropriate SENSE lines.

Caution The module’s analog channels may be connected to different earths only within

the permissible common mode range.

More extensive electrical isolation is not permissible for design reasons.

Non-compliance with the above will cause incorrect measurements, even on uninvolved channels, and can result in transient currents which will cause permanent

damage to the module.

2.7.1. Fault currents

A large number of the conceivable incorrect assignments of analog connections can

be resolved by means of circuit organisation.

Nonetheless, it is not economically possible with the components available today to

guarantee absolute protection against all fault currents that can be implanted from

outside.

Caution Faulty wiring, incorrect power supply or high potential differences in the measuring