Rockwell Automation Flashcards
Which is true of all overload relays?
All overloads have a normally closed ‘trip’ contact.
They are required for most motor circuits.
E100 Solid State overload relay selection
Select an E-100 solid state overload relay. The overload must directly mount to a NEMA Bulletin 500 Size 1 contactor.
Motor Data
Full load current - 13.5 amps
Class 20 Protection
592-1EFDC, 592-1EFEC
Auxiliary Contacts
Use in control circuits or to provide indication or feedback status.
Coil
Must be energized for the starter to turn on.
Hold-In Contact
Normally open contacts used for 3-wire control circuits.
Power Contacts
Normally open contacts that when closed apply voltage to the motor terminals.
Which of the following is not true of contacts?
Power contacts are optional.
What is not true of reversing starters?
Separate overloads operate the motor in both directions.
Combination Starter
This starter also includes a disconnect.
Full Voltage Starter
This starter transfers the line (system) voltage to the motor terminals.
IEC Enclosed Starter Selection
Enclosed IEC starter non-reversing:
Plastic enclosure Outdoor and NEMA 4X rating
Smallest possible enclosed starter
System Voltage 480 V AC
Control Voltage 120 V AC
Motor 2hp
On/Run Pilot Light
Blue Reset Push Button
Bimetallic Overload Relay
109-C09KDB40-4R-7
NEMA Starter Selection
Bulletin 509 Enclosed Starter
Stainless Steel Enclosure Type 4X
Motor Information: 10 HP 460V AC 60hz
Coil Voltage 24V AC 60hz
Overload Type - Heater type
Modifications:
Start and Stop Push-buttons
Red Pilot Light
Note: Modular Kits
Modular kitting is offered with open style NEMA Starters Sizes 0-4. Stocked modular components are shipped in a single carton. The starter will appear as one item with one catalog number.
509-BCJ-1-4R
NEMA Starter Selection
NEMA design Bulletin 509 in a Modular Kit
Open Style
Motor Information: 3 HP 460V AC 60hz
Coil Voltage 120V AC 60hz
Overload Type - Euclectic (heater type)
Modifications:
Surge Suppressor
1 Normally Open, 1 Normally Closed Auxiliary Contacts
Note: Modular Kits
Modular kitting is offered with open style NEMA Starters Sizes 0-4. Stocked modular components are shipped in a single carton. The starter will appear as one item with one catalog number.
509-AOD-17-901
NEMA Starter Selection
Full Voltage Reversing Starter
Traditional design using NEMA 500 line contactors
Motor Information: 25HP 460V AC 60hz
Coil Voltage 120V AC 60hz
Overload Type - Euclectic
Normally Open Auxiliary on each contactor
505-COD-90
Inductive proximity sensors detect which types of targets?
Inductive proximity sensors only detect metal targets.
Which inductive proximity family is the most cost effective?
The 872C WorldProx is a general purpose cylindrical proximity sensor and is the most cost effective proximity sensor line.
Which inductive proximity family features a mental sensing face?
The 871TM is the only listed model with a metal sensing face. The others have plastic sensing faces.
Which inductive proximity family features a mental sensing face?
The 871TM is the only listed model with a metal sensing face. The others have plastic sensing faces.
Rank the sensing modes from the most reliable detection to the least reliable dfetection.
1.Transmitted Beam
2.Polarized Retroreflective
3.Standard Retroreflective
4.Background Suppression
5.Standard Diffuse
Which of the following would be a typical response time for a standard discrete DC photoelectric sensor?
1 ms is a typical response time for a standard DC photoelectric sensor
A retroreflective sensor turns its output ON when the target is present and OFF when no target is detected. Is the output Light Operate (LO) or Dark Operate (DO)?
Dark Operate (DO)
Background Suppression is more reliable than which other sensing mode or modes?
Standard Diffuse
Because of their reliance on sound waves, ultrasonic sensors have relatively poor repeatability
False. The speed of sound is constant in a given media at a given temperature. As a result, ultrasonic sensors have excellent repeatability - typically around 0.1% of the maximum sensing range. For example, an 873P with a maximum range of 900mm has a repeatability of +/- 0.9mm.
Conventional Thermal Overloads are only able to provide the following information?
Tripped condition - Motor offline - Production lost
What kind of diagnostic data are we getting from the Smart Motor Control Device?
Location of motor
Nature of alarm condition
What information do we have available to inform an operator about the location of a sensor?
ASN (Application Specific Naming)
Sensor location information
How can we detect incorrect wiring during commissioning?
by using Smart Sensor diagnostic information
by using electronic keying
Which technology does RA offer for Track and Trace?
RFID System (Bulletin 56RF)
Code Reader Camera (Bulletin 48CR)
What kind of data can we track with Ident products
Production Data
2D Code Data
Logistical Data
Barcode Data
LOT Code Data
Quality Data
Why does time stamping help to improve the machine performance?
time stamping is used to synchronize sensor to actor function
to optimize infeed speed of a machine
to measure how long it took to solve an event
A system consists of a fast robotic arm that can operate in three distinct areas - Loading, stamping, and unloading. The stamping operation itself is a hazard. The feeder mechanism in the load area has a pinch point hazard. The material load and unload areas are each protected by light curtains. Loading and unloading are performed manually and the operators’ arms do pass through the light curtains for each of these operations. It is not possible to access the other areas of the machine through either light curtain. There is a maintenance access door that is protected with a safety locking mechanism and monitored with a safety switch. This door allows access to the whole machine. There is a multi-zone laser scanner that is capable of detecting a person anywhere in the machine area that must be clear prior to a system restart. What is the maximum number of safety zones that can be implemented on this system?
3
Which safety circuit Categories (CAT) are dual channel?
CAT 3 and CAT 4 are dual channel circuit structures.
What is a reason to use a Programmable Safety Controller instead of a Safety Monitoring Relay?
For increased application flexibility
1791 Compact Block Guard I/O modules can be configured for safety related analog inputs.
False. Safety related analog inputs are only available in 1734 Point I/O.
What are the key features of the SmartGuard stand-alone safety controller?
The ability to communicate diagnostic information via EtherNet/IP
The inclusion of embedded (local) safety I/O
The ability to send and receive CIP safety messages via DeviceNet
An L71S processor must be used with a 1756-LSP safety partner to achieve SIL3.
False. An L71S is used with a 1756-L7SP, not the -LSP
Which drive is optimized for HVAC fan control?
The Powerflex 400 is optimized for HVAC fan control.
The PowerFlex 525 does not have:
The PowerFlex 525 does not have Torque Regulation.
Which drive does not offer the 7th IGBT for dynamic braking?
PowerFlex 400 does not offer the 7th IGBT for dynamic braking
Which one of the following is NOT a feature of compact class drives?
Torque Prove capability is NOT a feature of compact class drives.
Active Front End (AFE) technology controls which of the following processes within PowerFlex 755T drives?
Mitigates harmonic distortion
Return excess energy back to the power source
Which factors below improve energy efficiency?
Powering down unused equipment
Proper tuning of drive to the application
Optimized move types
Reuse the energy from a motor operating as a generator
Optimized Move Types
Fine tunes the acceleration and deceleration response of a drive
Drive Efficiency
A fundamental characteristic, based on ratio of power output and power input.
This feature provides a path for different drives to share DC energy:
Common Bus System
Provides tighter control of moving parts, which reduces wear and saves on material costs
Adaptive Tuning
Automatically compensates for changing inertia, compliance, and low frequency resonances
Load Observer
Which Autotuning mode would be used if the inertia of the motor is not known?
10:910=InertialMotor, Motor Inertia Test
Torque filters address resonances in which frequency range?
Mid Frequency
What are the possible benefits of torque filters?
Reduced machine maintenance
Energy savings
Shorter commissioning time
Extended product life
Accounts for machine variation
Removing a mechanical control device (damper or valve) and using a PowerFlex drive to control the motor provides which benefits?
Motor runs at the speed required by the application
Current draw determined by load needs
Control initial current draw and minimize noise
Which are true of modular stack lgihts?
They are available with steady or flashing operation.
The light modules can be assembled in any order.
Each light module can be replaced without replacing the whole stack light.
What is the advantage/s of having an in-line sound module with the 856T Control Tower Stack light?
The top level is available for other modules such as a beacon.
True or False. Before the enclosure door can be opened the disconnect switch must be turned off.
True
Combination Starter uses a disconnect handle that is mounted on the flange.
NEMA Combination starters
This combination starter has the smallest form size.
IEC combination starter in a plastic enclosure.
512 Combination Starter Selection
Line (System) Voltage 240 Volts - 3 phase
Enclosure: Reset in Door. Dust-tight, Outdoor Use.
Fusible Disconnect: Class R 60-amp fuse clips
Motor Overload protection - Eutectic Overload
Motor information-Full voltage non-reversing. 230 Volts AC 15 horsepower
Control Voltage 120 Volt AC (customer supplied)
Start-Stop Pushbutons
Red Pilot Light (start) Green Pilot Light (stop)
Auxiliary Contacts: 1 N.O. auxiliary on contactor. 1 N.O. auxiliary on disconnect.
512-CFAD-1-4RG-25R-908
When implementing device hardening as part of a defense-in-depth strategy, which protocol would be used for troubleshooting problems on the network?
When implementing device hardening as part of a defense-in-depth strategy, use SNMPv3 for troubleshooting problems on the network.
Which of the following are methods for securing network access?
Firewalls, intrusion protection, and intrusion detection are used for securing network access.
Which of the following is at the core or center of the Defense-in-Depth Strategy Model?
The Device
Which of the following enhance physical security?
IP Video Surveillance
Electronic Locks
Mechanical Locks
Which of the following are best practices for restricting access to a network?
Which of the following are considered types of network attacks?
VLAN Hopping
Rogue DHCP
Which is NOT a best practice for mitigating VLAN attacks in a layer 2 network?
Configuring all IACS facing ports as trunked ports
What product would you recommend for an applications where the input voltage drops for very short durations of time?
Buffer module
True or False. Switch Mode Power Supplies convert DC voltages to AC voltages.
False
Select a power supply to meet the following specification.
Performance power supply (XLS family)
Must accept input voltages from 100 to 240V AC single phase (Wide Rage)
Output voltage- 24VDC (adjustable to 28VDC)
Power Supply Size - 480 Watts
No special features like Conformal Coating or ATEX compliance are required
1606-XLE480EPC, 1606-XLE480EA
In a linear network system which has not been upgraded and has had no maintenance intervention, which of these design steps will mitigate against unexpected network shutdown?
Quality of Service and VLAN segmentation will protect a system from changes to the network configuration, but will operate consistently through a systems lifecycle. Resilient Ethernet Protocol only offers advantages in a ring topology.
Which technique makes real-time control possible with IEEE802.11 wireless communications today?
TCP, AES128 and Producer/Consumer are all important techniques for IACS networks that include wireless segments, none define EtherNet/IP’s ability to operate in a wireless environment.
Which of these engineering decisions results in increased risk of plant downtime due to accidental creation of network loops?
Poor grounding increases risk of noise related failure, but not network loops. REP, RSTP and PRP all reduce the risk of network loops resulting in network failure Isolation can limit the scope of network failure, but can also reduce the ability to diagnose network failure.
What is the best way to secure the PAC connection?
Block unused port provides network security, but lock-in connectors on a cable provide a similar protection and production security is improved by the ring’s cable fault protection as well.
What is the best way to secure the central switch?
Block unused port only mitigates against one threat vector. It is best practice on managed switches also, but managed switches have multiple tools to prevent unauthorized access.
Industrial Zone characteristic
Human interaction, Routing, Client-Server Interaction
Cell/Area Zone characteristic
MAC Address, IACS QoS, I/O Modules
Which command must be enabled on routers or Layer 3 switches for remote EtherNet/IP browsing to occur?
Electrical power is distributed within the MCC section to all the units by:
Horizontal bus