Related Manuals for Optical Systems Design OSD151
Summary of Contents for Optical Systems Design OSD151
- Page 1 OPTICAL SYSTEMS DESIGN OSD151 SYNCHRONOUS/ASYNCHRONOUS FIBER OPTIC RS422/TTL MODEM DOC ID: 10100306 PAGE 1 OF 12 OSD151 OPERATOR MANUAL...
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Page 2: Table Of Contents
FIGURE 5: TIMING DIAGRAM ......................9 FIGURE 6: BLOCK DIAGRAM ......................10 TABLE 1: PRODUCTS AND OPTIONS ....................4 TABLE 2: TECHNICAL SPECIFICATIONS ..................5 TABLE 3: PIN ASSIGNMENTS ......................6 DOC ID: 10100306 PAGE 2 OF 12 OSD151 OPERATOR MANUAL... -
Page 3: Technical Summary
RS422 communications over two kilometres of commonly available fiber optic cable. A pair of OSD151 short haul RS422 modems and a duplex fiber optic cable form a link that is a direct replacement for twisted pair extension cables. This link provides an effective way of extending cables from building to building while providing EMI/RFI protection, data security, reduced data error rates, and elimination of ground loops. -
Page 4: Typical Configuration
OPTICAL SYSTEMS DESIGN 1.2 TYPICAL CONFIGURATION Below in FIGURE 1 is a typical set-up for two OSD151’s that may be used together. OSD151 OSD151 Data Data Fiber Optic Cable Data Data FIGURE 1: TYPICAL CONFIGURATION It should be noted that the unit can operate in either synchronous or asynchronous mode and that the mode is user selected via a switch on the OSD151. -
Page 5: Technical Specification
OPTICAL SYSTEMS DESIGN 1.4 TECHNICAL SPECIFICATION TABLE 2 below lists the Technical Specifications for the OSD151. TABLE 2: TECHNICAL SPECIFICATIONS SPECIFICATION PERFORMANCE DC to 200kbps in asynchronous mode Data rate 1kbps to 2.5Mbps in synchronous mode < ± 100ns over the full dynamic range for synchronous transmission Pulse Distortion and Jitter <... -
Page 6: Pin Assignments
OPTICAL SYSTEMS DESIGN 1.5 PIN ASSIGNMENTS TABLE 3 identifies the pin assignments of the 25 Pin D Connector on the OSD151. TABLE 3: PIN ASSIGNMENTS NAME FUNCTION Protective ground pin Connected to case. Transmit data + Modem accepts data. Transmit data - Modem accepts data. -
Page 7: Installation And Operation
2. INSTALLATION AND OPERATION 2.1 INTRODUCTION This section outlines the methods required to install and operate the OSD151 successfully. This information should be studied carefully if damage to the equipment or poor results are to be avoided. This equipment has been fully tested prior to dispatch and is ready for immediate operation. However, it is advisable to check for external transportation damage prior to operation. -
Page 8: Packaging
OPTICAL SYSTEMS DESIGN 2.2.2 PACKAGING The case of the OSD151 is made from metal, and is designed to be placed on a bench or to be mounted directly on the host equipment’s 25 Pin D Connector. FIGURE 3 below, provides the outside dimensions of the OSD151. -
Page 9: Other Connections
Likewise ensure that the receiving equipment can accept the phasing of the clock and data signals output from the OSD151 which has the clock going logically high about 15ns to 20ns before the data bit. Refer to Figure 5 for more details. -
Page 10: Operation
Ext Power REGULATION FIGURE 6: BLOCK DIAGRAM 2.3.2 CONTROLS The OSD151 has just one control: a toggle switch located between the optical connectors which selects either synchronous or asynchronous operation. DOC ID: 10100306 PAGE 10 OF 12 OSD151 OPERATOR MANUAL... -
Page 11: Maintenance
Ensure that the correct power source (ie +12V DC) is connected to pin 9 of the D connector or to the power socket. Ensure that the RS422 signal is connected to the modem correctly and that the distant OSD151 modem has been terminated correctly to any external equipment. -
Page 12: Warranty
For warranty period, please call your local OSD distributor. 4.2 ALL REPAIRS Optical Systems Design reserves the right to repair or replace faulty modules/units. Please obtain a “Return Material Authorisation” number form and number before returning goods. Goods must be returned to Optical Systems Design, Warriewood or its nominated authorised representative, for all repairs in adequate packing material.