Integrate AV Solutions Flashcards
Class 1 Wire
Shock and Fire hazard exist. 600v or more
Class 2 Wire
Neither shock nor fire hazard exist. 150v or more
Class 3 wire
Not Fire Hazard, but shock hazard. 300v or more
Types of Cable (4)
Coaxial
Unshielded Twisted Pair
Shielded Twisted Pair
Fiber Optic
Coaxial Cable
Commonly used for RF and Video
Unshielded Twisted Pair
Hi Speed Data
Shielded Twisted Pair
Audio and Low Speed Data
Fiber Optic
Long Distance Audio, Video, Data
Signal Seperation
Physical Distance among cables of various signal levels
Stripping Cables
No more than 10% of strands in a wire containing more than 21 strands can be lost
Mounting Malfunctions (5)
Improper Calculations Shear - break from wall Tensile Strength - Hardware's Elasticity physically stretches Pull Out Placement of Bolts
Minimum Safety Factor
5
Mounting Types (3)
Floor
Wall
Overhead
Wall Mounting (2)
Can the wall withstand the weight of the load. Investigate wall construction
Will the weight of the load pull the assembly from the wall
Wall Blocking
Nogging, Dwang
Overhead mounting in concrete (2)
Poured Pan - waffle looking concrete
Post Tension - smooth with hi tension cables within (drilling into a cable in post tension concrete can snap)
Control Systems - HMI
Human Machine Interface
HMI Components (3)
Hardware
Software
Firmware
Hardware Components (4)
CPU
User Interface (touch panel, wall buttons)
Transmitters and Receivers
Interface Components
Ethernet
Transmits Data over LAN
LAN
Local Area Network
Ethernet Data Speeds (4)
10 Mbps
100 Mbps
1 Gbps
40/100 Gbps
Ethernet Transmission
Signals are transmitted serially, one bit at a time, over the shared signal channel
MANs
Metropolitan Area Network. LANs are connected together of over a Corporate Campus
WANs
Wide Area Network. MANs and LANs are connected together within multiple cities.
Methods of controlling AV devices (5)
Infrared RF Contact closure RS-232 RS-422
Infrared
Least desirable connection. No feedback.
RF
Required emitter and receiver. does not need to be in line of site. Typically wall or rack mounted.
Contact closure
switch. simplest form of remote control communication. opening and closing an electrical circuit
Types of Contact closure (2)
momentary - activate only when pushed.
latching - stay in on or off
RS-232
Max 50’ cable length. limited to 115.2 Kbps. Unbalanced connection. allows feedback
RS-422
Max 4000’ cable length. 10 Mbps. Balanced Connection
TCP
Transmission Control Protocol
Transmission Control Protocol (4)
Creates a verified connection with remote host before sending data.
Reliable - tracks each packet to insure it arrives intact
Most common protocol for sending data across internet
supports ethernet network communication
Static IP address
Never changing IP address
Dynamic IP address
Changeable IP address
IP addresses
All devices in a network must have an IP address
Check box for “assign IP address”
Found in Network Configurations
DHCP
Dynamic Host Configuration Protocol
Dynamic Host Configuration Protocol
Will assign addresses
Device gets to keep address for a preset “lease time”
Static IP Address Use
Static IP addresses work well for devices that you want to reliable locate.
Static IP Address Input
If you don’t have a DHCP service on a network you will need to set addresses manually
Reserved Static IP addresses
You may wont to reserve a set of static addresses for your AV devices. These addresses will be manually reserved on a DHCP server
Setting an IP Address Requirement (2)
IP Address
Subnet Mask
Device Identified by domain name requirements (3)
Device Domain Name
DNS Server
Gateway
DNS
Domain Name System
Domain Name System (3)
Server that keeps track of all your equipment on a network
can call devices by name instead of numbers
no two devices can have the same name on a system
DHCP and DNS
When DHCP and DNS servers are working togetheryou may never need to know the IP addresses
WINS
Windows Internet Network System. Behave similarly to DNS
Software in Control System (3)
System will not function without software.
eg. In order to create a touch panel you need to have specific software
You may need to load programs into control systems
Firmware in Control Systems (4)
Set of software Instructions that a machine follows
Bridge between hardware and software
Periodically updated
You may be required to upload current firmware
Non-volitle Memory Chip
Won’t lose info when power is removed
Power Control Systems - North America, Japan, Parts of South America (5)
60 HZ 120v Single Phase 120/240v Single Phase 120/208v Three Phase 277/408v Three Phase
120v Single Phase
2 wires
120/240v Single Phase
Uses three wires. One wire with 120v, Another with 120v same phase. third is neutral. Used in hoes where load is small. Two legs of power can power appliances
120/208v Three Phase
In Commercial Buildings
want AV equipment to come from one phase ideally
Interconnect equipment form different phases can cause noise
Uses 4 wires.
Each hot caries it’s own phase
Any phase together result in 208v
Transformer is called a Wye because “Y” shape
277/408v Three Phase
120/208v is easily derived from this system
Designing a Balanced Load
A large infrequently used AV system cannot be placed on one phase of a building’s power system. The system would be unbalances
Power Control Systems - Rest of the world
230v single phase
230/400v three phase
Series Circuits
Power seeks to return to its source. Voltage will divide across the registers as well as the wire in a circuit
Parallel Circuits
Current will take any and all available pathways
Voltage remains the same across all loads
Grounding (3)
Ground ensures the systems are stable, safe and reliable
Primary objective is to limit human exposure to high voltage
requires connecting one side of a circuit to the ground
What need to be grounded (2)
Anything powered by electricity
Metallic elements that come in contact with electrical components - building frame, wiring conduit, raceways, equipment racks
Specifying Electrical Power
Ascertain Electrical Loads Required
Determine how power will be supplied and distributed
AMP =
AMP = Watts / Volts
