Keri Systems LC-508 Wiegand Elevator Control - Manual (Page 6)

Wiegand Elevator Control Panel
2305 Bering Drive 01942-001 Rev. D
San Jose, CA 95131 USA
(800) 260-5265 (408) 435-8400 FAX (408) 577-1792
Web: www.kerisys.com E-mail: [email protected]
Page 6 of 24
Quick S
tart Guide
LC-502W/LC-508W
4.2 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 LC-500W controller near EMI sources - EMI sources can affect the performance of
the controller.
• Use switching power supplies - they are EMI sources.
• Route network and reader cables beside power cables - transients on the power cables may be
picked-up by network and reader cables.
• Stretch or over-tension cables.
• Route cables over sharp objects.
• Let the cables get tangled.
• Mix LC-500Ws with PXL-100s in the same network.
• Connect earth ground to the network cable shield - the LC-500W 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.