Keri Systems EntraGuard Silver Quick Start - Manual (Page 6)

EntraGuard
®
Silver Telephone Entry Control
Quick Start Guide
Page 6 of 27 P/N: 01960-001 Rev. D
3.0 When Installing Controllers
DO
•
since this is a telephone entry system at least one phone line will be necessary, it is important to plan ahead to meet
power and telephone requirements for your system (if using a modem, the host computer will need 1 phone line, plus
one for each master controller in each network or each EntraGuard unit)
• mount controllers in environmentally suitable areas - the EntraGuard Silver unit is weather resistant, but care should
be taken to avoid areas of weather/temperature/humidity extremes
• mount the controller at least 3 feet away from the controller's power supply to prevent EMI radiated from the power
supply from affecting the controller
• use the enclosure as a mounting template to mark drilling holes for permanent mounting
• note the locations of the knockouts in the enclosures and remove the appropriate knockout for the easiest cable
routing into the controller
• route all controllers in a network in a single, continuous daisy-chain (with the EntraGuard Silver controller as the
master)
• route cables in accessible areas for ease of maintenance
• connect all controllers to a quality earth ground
1
• add transient suppression across electric devices attached to a controller output
• use an isolation relay (P/N IRP-1) if attaching to a parking gate, a turnstile, or any application using a large electric
motor
• verify the controller's supply voltage is 12 VDC – long power line runs cause a drop in voltage at the end of the run
• verify proper operation of the host computer's COM port or Ethernet/LAN WAN connection.
DO NOT
•
make modem phone line connections through PBX telephone switching systems - most modems are not compatible
with PBX systems leading to disconnection problems with the modem
• locate the EntraGuard Silver controller near EMI sources - EMI sources can affect the performance of the controller
• use switching power supplies - they are EMI sources
• route network cables beside power cables - transients on the power cables may be picked-up by network and reader
cables
• stretch or over-tension cables
• route over sharp objects
• let the wires get tangled
• route the EntraGuard Silver controller as a slave to a PXL-250 master
• route all controllers in a network in spur, hub, or loop configurations
• connect earth ground
1
to the network cable shield - the EntraGuard Silver automatically connects earth ground to the
shield at one point on the network to prevent ground loops
• use gender changer plugs when making RS-232 serial communication connections (unless you know it is a "straight-
through" plug) - gender changers may have internal wiring changes that can disrupt communications
1. Ground wire is green, with or without yellow tracer.