KeriSystems Telebyte 209 Quick Start Manual

Short haul modem

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Telebyte 209 Short Haul Modem

This document provides installation instructions for the Telebyte 209 Short Haul Modem (Keri

Systems P/N SHM-232). This short haul modem can be used to assist in long-distance, direct,

connections between a host computer and an access control network. The Telebyte 209 is fully

compatible with PC/AT serial communication ports and requires no external power for its

operation.

1.0

Specifications

1.1

Dimensions

0.85 inches High x 1.30 inches Wide x 3.00 inches Long

(2.16 cm H x 3.30 cm W x 7.62 cm L)

1.2

Connector

DB-9F with screw connection terminals

1.3

Cable Run Distance Per Wire Gauge

Using Belden 9502 or its equivalent, see Table 1

Data Rate (KBPS)

9600 Baud

2.0

Installation

The short haul modems are shipped in pairs. One modem is attached to the master controller on

the access control network. The other is attached to the host computer's COM port.

NOTE: Each short haul modem has a small switch allowing the modem to be set for use with

either Data Terminal Equipment (DTE) or Data Communication Equipment (DCE) devices.

Please ensure that each modem's switch is set correctly.

The switch is used to set the modem to match the type of device it is connected to.

Insert a thin-blade screwdriver into the switch slot and verify the switch is turned completely

counter-clockwise for a DTE application or completely clockwise for a DCE application.

Applying too much pressure while turning the switch may damage the modem.

NOTE: When a KDP-252 cable is used, make sure the short haul modem switch is set for a DCE

application.

Wire Gauge

4.9 Miles

3.1 Miles

Unit 17 Park Farm Industrial Estate

Buntingford, Herts SG9 9AZ UK

TEL: + 44 (0) 1763 273 243 FAX: + 44 (0) 1763 274 106

Web: www.kerisys.com E-mail: sales@kerisystems.co.uk

1.8 Miles

01850-001 Rev. G

Page 1 of 4

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Summary of Contents for KeriSystems Telebyte 209

Page 1 Systems P/N SHM-232). This short haul modem can be used to assist in long-distance, direct, connections between a host computer and an access control network. The Telebyte 209 is fully compatible with PC/AT serial communication ports and requires no external power for its operation.
Page 2 Telebyte 209 Short Haul Modem Connecting to a PXL-250 Controller The DB-9 connector on the short haul modem and on the PXL-250 controller are both female. To make the short haul modem to controller connection a DB-9 male-to-male connector is provided (see Figure 1).
Page 3 Telebyte 209 Short Haul Modem Connecting to the Host Computer - DB-9 to DB-9 If the host computer's COM port uses a male DB-9 connector the short haul modem can be plugged directly to the COM port (see Figure 2). Set the switch on the short haul modem to the DCE position by gently turning the switch completely counter-clockwise.
Page 4 Telebyte 209 Short Haul Modem 2.4.2 Using a "Twist" Reduction Plug If the reduction plug uses 2-3 twist wiring (pin 2 on the 25 pin side goes to pin 3 on the 9 pin side and pin 3 on the 25 pin side goes to pin 2 on the 9 pin side) make the connection as shown in Figure 4.