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