Keri Systems PXL-250 Quick Start - Manual (Page 14)

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 14 of 25
Quick Start Guide
PXL-250
4.12 Controller RS-232 Serial Port to PC Connection
The controller’s RS-232 serial port (see Figure 1 on page 1) provides a communication link between the access control
network and the host computer via one of two ways.
• A serial direct connect cable between master controller and host computer (see Section 4.12.1).
• Two modems making a remote connection between the master controller and host computer (see Section 4.12.2 on
page 16 and Section 4.12.3 on page 18).
NOTE: Do not use male/female gender changer plugs or 25-pin to 9-pin adapters when making RS-232 serial port
connections. These devices may have internal wiring changes that can disrupt communications when implemented in
conjunction with the Keri Systems serial wiring instructions. If you must use a gender changer plug, ensure it is a
“straight-through” plug.
NOTE: Keri Systems requires using modems from the same manufacturer at both the host computer and the access
control network. This eliminates the possibility of incompatibilities between modems from two different manufacturers
from affecting the communication between access control network and host computer. Keri Systems cannot be held
responsible for problems caused by incompatibilities between modems from two different manufacturers.
NOTE: When using 56K modems to communicate with remote access control networks, all modems must use the same
communication format - either X2 or Flex. Incompatibilities between the two formats make some modems of one format
incapable of reliable communication with modems of the competing format. Modems using the V.90 specification are
compatible regardless of whether they are from an X2 or Flex manufacturer.
4.12.1 Direct Serial Connection – Controller to PC
• If the host computer has a male DB-9 connector on the serial port, you must use a Keri Systems KDP-252 cable or
create a cable according to the drawing in Section 4.12.1.1 on page 15.
• If the host computer has a male DB-25 connector on the serial port, you must use a Keri Systems KDP-251 cable or
create a cable according to the drawing in Section 4.12.1.2 on page 15.