Infrared

• The IR RDR range in optimal conditions is 25m’ facing the reader.
• The reader’s range decreases as a function of the angle from the direct line

IR Reader Noise

Least amount of IR Noise ------------------------------------------------------------------------ Most amount of IR Noise

Incandescent - Fluorescent - High Efficiency Fluorescent - Large Plasma Displays - Direct Illumination -Reflected Sunlight - Direct Sunlight

RF Reader Blockage

Least Blockage ---------------------------------- Most Blockage

Furniture - People - Brick - Cement - Reinforced Concrete - Metal

RF Reader Placement

• RF signals are significantly attenuated while passing through metal, cement walls and ceilings
• Install the readers as far away as possible from RF emitters such as: transmitters, microwave ovens, large electrical motors, electronic ballasts
• Make sure that the reader’s antenna is not blocked by metal objects

Measuring RF Background Noise

• Use site builder with portable RDR to measure the noise level.
• Noise level at the RDR placement should not exceed 80 units
• Make a survey of the operating frequencies +- 1MHz

(contact Elpas for spectrum analyzer recommendation)

LF Beacon Installation

• Installed at least 50 cm from any metal.
• Powered by 26 AWG cable connected to Elpas junction box. Max length is 3 m. No data in cable.
• Maximum LF power is in front (and backward).
• Install 2 LF beacons for better detection capability and direction determination (one before door and another behind). Distance between the LF beacons should be at least 4 m.
• Set the LF beacon ID code by the DIP SW (8 positions)
• Do not set the not allowed ID codes.
• When not allowed ID code is set the LF beacon will beep.
• When connecting first time the LF it will be beep after the self test (1-2 sec).

Wiring

Layout

• Use a floor plan
• Carefully plan reader and junction box placements
• Shortest possible path
• Check connectivity
• Document the wiring layout for future maintenance

Assumptions

Use Elpas cables only

• –Use ELPAS’ 18AWG backbone cable (P/N ERS01703)
• –Use ELPAS’ reader cable (2.5m’ 26AWG ERS01702)

Definitions and Rules

• Segment: Continuous media bounded on at least one side by either an interface card, router or PLR
• Channel:Network segments bounded on at least one side by a router. For installation without routers, the entire network is defined as a single channel
• Max of 9 segments per channel
• Node: Device that contains a neuron chip (requires service pin registration)
• Max of 50 nodes per segments
• The first 50 RDRs’ in a channel can work without a PLR
• Max of one PLR between a node and the network card/Router
• The 4 outputs of the PLR constitute one free topology segment

Bus Topology Specifications

• Total Cable length 2000 meters (18AWG&26AWG)
• Double ended Termination 105 Ohm +- 1% 0.25W

Free Topology Specifications (recommended for small sites only)

• Total Cable length 500 meters (18AWG&26AWG)
• Single point Termination 52.3 Ohm +- 1% .25W (anywhere on the segment)

Power Supply Planning

• Apply at least one P/S per segments that contain nodes
• A node should be powered only by one P/S
• For accurate planning calculate the power according to the following:

–Power required per IR & RF readers is 500/600mW 12-24V respectively

–Backbone resistance 2.2 Ohms per 100m’ single wire

–Ignore the RDR cables (2.5m’)

–Minimum operational requirement for a RDR is 12V