Keri Systems PXL-250 Quick Start - Manual (Page 5)

PXL-250 Tiger Controller
1530 Old Oakland Road, Suite 100 01835-002 Rev. 4.2
San Jose, CA 95112 USA
(800) 260-5265 (408) 451-2520 FAX (408) 441-0309
Web: http://www.kerisys.com E-mail: [email protected]
Page 5 of 25
PXL-250
Quick Start Guide
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 PXL-250 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 over sharp objects
• let the wires get tangled
• mix PXL-250s with PXL-100s in the same network
• route all controllers in a network in spur, hub, or loop configurations
• connect earth ground 1 to the network cable shield - the PXL-250 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