CIE-1

Which of the following is most likely to be the voltage level used internally in a PLC excluding the

voltage levels that might occur during conditioning in output/ input channels

• 5v

• 24v

• 110v

• 240v

The system bus in PLC is used for

• Communicating

  between internal

  devices

• Communicating

  between input and

  output devices

• Communicating

  between external

  devices

• Communicating

  between CPU and

  Memory

When two NC contacts are connected in series the operation is

• AND

• OR

• NAND

• NOR

When two NC contacts are connected in parallel the operation is

• AND

• OR

• NAND

• NOR

The PLC having extended input and output module is

• Single box type

• Modular Type

• Both a and b

• None of the

  above

Identify the PLC manufacturers

• OMRON

• Mitsubishi

• Telemechanique

• All the above

The benefits of SCADA system is

• Accurate

• Efficient

• Precise

• None of the

  above

The technology used in line modem is

• Phase Shift Keying

• Frequency Shift Keying

• Frequency

  Modulation

• Amplitude

  Modulation

One of the way to communicate with RTU over longer distance is

• SCADA

• Dialup Telephone

• LAN

• WAN

Interoperability is---------

• Ability to mix

  different

  manufacturers

  equipment

• Asset management

  integrated with in

  SCADA

• Asset management

  integrated with in

  RTU

• None of the

  above