VX500 Fiberoptic Switch Operation Manual 91500 Revision B
DiCon Fiberoptics VX500 Fiberoptic Switch Copyright © 1998 DiCon Fiberoptics, Incorporated. All rights reserved. Printed in the United States of America. No part of this manual may be reproduced, in any form or by any means, electronic or mechanical, including photocopying, without the express written permission of DiCon Fiberoptics. We have reason to believe that a number of the company and product names appearing herein constitute trademarks or have been designated as such by their respective holders.
Contents Product Overview ....................................................................................................... 5 Optical Switch Module ............................................................................................... VX500 Interface Board .............................................................................................. Connecting to the Interface ................................................................................. Reading the Status LED .........
DiCon Fiberoptics VX500 Fiberoptic Switch 91500 Revision B
Product Overview 5 Product Overview DiCon’s VX500 Fiberoptic Switch is a multi-channel fiberoptic switch designed for integration within products that require 1 × N or 2 × N optical switch routing. The design of the VX500 is based on patented technology which enables precise fiber-to-fiber positioning of either singlemode or multimode fibers.
DiCon Fiberoptics VX500 Fiberoptic Switch Connecting to the Interface The electrical connector on the DiCon VX500 Switch is a male twelve-pin 0.100-inch rightangle square-pin friction-lock header (Molex part number 22-12-2124). To mate to this connector, use a corresponding female receptacle housing (Molex part number 22-01-3127 or equivalent) and contacts (Molex part number 08-56-0110 or equivalent). The mating connector can be obtained from Molex (Tel: (708)969-4550) or from DiCon Fiberoptics, Inc.
Switch Operation 7 Switch Operation The twelve-pin interface is used for supply power, channel selection, and status checking. The following table defines the signals associated with each pin. Table 1: Interface Pin Assignments Pin Number Signal Name Signal Type 1 2 3 4 5 6 7 8 9 GND GND D0 D1 D2 D3 D4 STROBE BUSY Power Power Input Input Input Input Input Input Output 10 ERROR Output 11 RESET Input 12 POWER Power Description Signal ground. Power ground.
DiCon Fiberoptics VX500 Fiberoptic Switch One way to reset the switch is to cycle the supply power to the switch. The switch returns to the reset position following the initial application of power to the POWER pin (see “Starting the Switch” on page 7). To return the switch to the reset position without interrupting the supply power, set the RESET input to low and apply a STROBE pulse.
Switch Operation 9 Figure 4: Simplex 1 × N Channel Order (Top View) CHANNEL N CHANNEL N CHANNEL 3 CHANNEL 2 CHANNEL 1 COMMON CHANNEL 3 CHANNEL 2 CHANNEL 1 COMMON To select the output channel of a simplex 1 × N switch with up to 32 output channels, set the five channel address inputs () and the RESET input as indicated in Table 2, then strobe the device.
DiCon Fiberoptics VX500 Fiberoptic Switch Table 2: Control Codes For Simplex 1 × N Configurations (Continued) RESET D4 D3 D2 D1 D0 Active Channel 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 1 27 28 29 30 31 32 Synchronous Duplex 1 × N Configurations The relationship between the optical inputs and outputs in a VX500 synchronous duplex 1 × N switch is shown in Figure 5.
Switch Operation 11 To select the output channel of a simplex 1 × N switch with up to 50 output channels (1 × 25), set the five channel address inputs () and the RESET input as indicated in Table 3, then strobe the device.
DiCon Fiberoptics VX500 Fiberoptic Switch Figure 8: 2 × N Non-Blocking Channel Order (Top View) CHANNEL N CHANNEL N CHANNEL 2 CHANNEL 1 COMMON 2 COMMON 1 CHANNEL 2 CHANNEL 1 COMMON 2 COMMON 1 To select the output channel of a 2 × N non-blocking switch with up to 32 output channels, set the five channel address inputs () and the RESET input as indicated in Table 4, then strobe the device.
Switch Operation 13 Table 4: Control Codes For 2 × N Non-Blocking Configurations (Continued) RESET D4 D3 D2 D1 D0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 0 1 1 0 0 1 1 1 0 1 0 1 0 1 Common 1 Active Channel Common 2 Active Channel 26 27 28 29 30 31 25 26 27 28 29 30 31 blocka a. When the channel address is set to N (the highest input channel), Common 1 is blocked and Common 2 is aligned with Channel N.
DiCon Fiberoptics VX500 Fiberoptic Switch To select the output channel of a 2 × N blocking switch with up to 16 output channels, set the five channel address inputs () and the RESET input as indicated in Table 5, then strobe the device.
Switch Operation 15 Timing Parameters Figure 11: VX500 Switch Timing Tstb STROBE Tsu Th RESET Tbsy Tsw BUSY OPTICAL OUTPUT Figure 12: VX500 Power-Up Timing POWER Tpwr STROBE RESET BUSY ERROR OPTICAL OUTPUT October 20, 1998
DiCon Fiberoptics VX500 Fiberoptic Switch Table 6: VX500 Timing Parameters Parameter Description Min. Max. Units Tsu Setup time. The channel address () and RESET inputs must remain stable preceding the falling edge of STROBE. Hold time. The channel address () and RESET inputs must remain stable following the falling edge of STROBE. 100 — ns 150 — ns STROBE pulse width.a STROBE low to BUSY high.
Switch Control 17 Switch Control Figure 13 illustrates the following sample control sequence for a 1 × N simplex switch. 1. Following power-up, the switch returns to reset position. After the initialization period, the device is ready to receive instructions. 2. The user brings STROBE high, brings RESET high to enable channel selection, and sets the desired channel address. The user applies a strobe pulse, sending the BUSY line high while the switch moves into alignment with channel 6.
DiCon Fiberoptics VX500 Fiberoptic Switch Controlling the VX500 Using a PC Printer Port It is possible to control the VX500 switch by connecting the interface board to a PC printer port and a power supply (+12VDC ±5%, 300 mA max.). The printer port has a 25-pin, Dshell connector. The recommended cable configuration for connection to the printer port is shown in Figure 15. The basic control flow for the VX500 is illustrated in Figure 14.
Switch Control 19 Figure 15: Parallel Port Line Assignments POWER SUPPLY – + VX500 SWITCH GND GND D0 D1 D2 D3 D4 STROBE BUSY ERROR RESET POWER 1 2 3 4 4 6 7 8 9 10 11 12 PARALLEL PORT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19-25 -STROBE DATA BIT 0 DATA BIT 1 DATA BIT 2 DATA BIT 3 DATA BIT 4 DATA BIT 5 DATA BIT 6 DATA BIT 7 -ACK BUSY PE SLCT -AUTO FEED -ERROR -INIT -SLCT IN GND GND The following BASIC program can be used to control the VX500 from a PC printer port.
DiCon Fiberoptics VX500 Fiberoptic Switch Specifications Table 7: Performance Specifications Parameter Minimum Typical Maximum Units — 0.6 1.2 dB — — -60 -20 -55 — dB dB — — 300+(16×N) ms — 10 million — — -80 — ±0.03 dB cycles dB — 780 — — 0.
Device Housing 21 Figure 16: VX500 Chassis Size 1 Housing Figure 17: VX500 Chassis Size 2 Housing October 20, 1998
DiCon Fiberoptics VX500 Fiberoptic Switch Handling Fiberoptic Components and Cables Handling Fiberoptic Cables Your switch may come with fiber pigtail outputs. Treat cables with care to avoid cable damage and minimize optical loss. The minimum bend radius for most optical cables is 35mm. Never bend an optical cable more sharply than this specification. Optical performance will degrade and the cable may break. • Avoid bending the optical cable near a cable strain relief boot.
Handling Fiberoptic Components and Cables 23 Mating Optical Connectors • Clean both connectors prior to mating. Any small particles trapped during the mating process can permanently damage the connector. • Insert the appropriate connector ferrule into the adapter smoothly. Do not allow the fiber tip to contact any surface. If the tip accidentally contacts a surface before mating, stop. Re-clean the connector and try again.
DiCon Fiberoptics, Inc. 1331 Eighth Street Berkeley, CA 94710 USA World Wide Web www.diconfiberoptics.
