Page 3 - Contents
SD000153 Rev. J May 2000 Contents Safety Information, Instructions, and Symbols .......................................................................1 Safety Information ...........................................................................................................1 Classification .......
Page 6 - Safety – 1; Safety Information, Instructions, and Symbols; Safety Information; Classification
Safety – 1 Safety Information, Instructions, and Symbols Safety Information Classification The unit consists of an exposed metal chassis that is connected directly to earth via a powercord and, therefore, is classified as a Class 1 instrument. Class 1 refers to equipment relyingon ground protection ...
Page 7 - Safety – 2; Safety Instructions; Before Initializing and Operating the Unit
Safety – 2 Safety Instructions The following safety instructions must be observed whenever the unit is operated, serviced, orrepaired. Failure to comply with any of these instructions or with any precaution or warningcontained in the user’s manual is in direct violation of the standards of design, m...
Page 8 - Safety – 3; Repairs are to be carried out only by a qualified professional.
Safety – 3 circuit the fuse. • Unless absolutely necessary, do not attempt to adjust or perform any maintenance or repair procedure when the unit is opened and connected toa power source. • Repairs are to be carried out only by a qualified professional. • Do not attempt any adjustment, maintenance, ...
Page 9 - Safety – 4; Safety Symbols; Table 1: Safety Symbols; Symbol; WARNING
Safety – 4 Safety Symbols The following symbols and messages can be marked on the unit (Table 1). Observe all safetyinstructions that are associated with a symbol. Table 1: Safety Symbols Symbol Description Laser safety. See the user’s manual for instructions on handling and operatingthe unit safely...
Page 10 - Safety – 5; Compliance; CE Compliance
Safety – 5 Compliance CE Compliance The unit has been designed and tested to comply with directive 73/23/EEC and its subsequentamendments by the European Community (EC or CE). The directive relates to electricalequipment designed for use within certain voltage limits. It ensures that electrical equi...
Page 11 - General Information and Specifications – 6; General Information and Specifications; General Information
General Information and Specifications – 6 General Information and Specifications General Information This user’s manual for the SB Series Fiberoptic Switch contains complete operatinginstructions. The SB Series 1xN programmable switches are designed to connect a single fiberoptic inputchannel to an...
Page 12 - General Information and Specifications – 7
General Information and Specifications – 7 Figure 2: Single-Common Configuration Dual-Common (SB-D) Switch Configuration The D configuration provides simultaneous connection of a bank of inputs to outputs (Figure3). The input A can be connected to 1A of 1B or …(N/2)A. In this dual-common configurati...
Page 13 - General Information and Specifications – 8; Figure 5: Dual-Common Blocking Configuration; Key Features
General Information and Specifications – 8 Figure 4: Single-Step Dual-Common Configuration Dual-Common Blocking (SB-F) Switch Configuration This configuration allows one of the inputs to be aligned with an output in a blocking sense,with reduced output channel counts available (Figure 5). Figure 5: ...
Page 14 - General Information and Specifications – 9; Specifications; Table 2: Optical Specifications; Parameter; Excluding connectors.
General Information and Specifications – 9 Specifications The following optical specifications describe the warranted characteristics of the unit ( Table 2).Supplementary specifications describe the typical non-warranted performance of the unit(Table 3 and Table 4). Table 2: Optical Specifications P...
Page 15 - General Information and Specifications – 10; Table 3: Operating Specifications; Applicable for optimum repeatability performance.; Table 4: Other Specifications; Electrical
General Information and Specifications – 10 Table 3: Operating Specifications Local control • Step-up, step-down channel selection • Control of one external relay driver • IEEE 488.1 address selection • Return-to-local function • Language selection Remotecontrol • GPIB interface: IEEE 488.1 1987 cap...
Page 16 - Getting Started – 11; Getting Started; Warning; Operating Environment
Getting Started – 11 Getting Started The SB Series Fiberoptic Switch consists of the switch unit and an AC power cord. The rack-mount kit is optional. Before Initializing and Operating the Unit Inspect the unit for any signs of damage. Read the user’s manual thoroughly, and become familiar with all ...
Page 17 - Getting Started – 12; Storing and Shipping
Getting Started – 12 Temperature The unit can be operated in the temperature range of 0 to 55 °C. Humidity The unit can be operated in environments with up to 95% humidity (0 to 55 °C). Do not exposeit to any environmental conditions or changes to environmental conditions that can causecondensation ...
Page 18 - Getting Started – 13; Cleaning Connectors; Caution
Getting Started – 13 Ship return material in the original shipping container and packing material. If these are notavailable, packaging guidelines are as follows: 1. W ear an anti-static wrist strap and work in an ESD controlled area. 2. Cover the front panel with a strip of cardboard. 3. W rap the ...
Page 19 - Getting Started – 14; parts of the connector.; Installing the Switch; To install the switch:
Getting Started – 14 1. Blow the sleeve with filtered compressed air (Figure 6). Figure 6: Connector Cleaning (connector type can vary) 2. Apply optical grade isopropyl alcohol or optical grade ethanol (do not use rubbing alcohol) to a small area of a lint-free towel and rub the end of the ferrule o...
Page 20 - Operating and Maintenance Instructions – 15; Operating and Maintenance Instructions; Front Panel; Figure 7: Front of the Switch; Operating Keys; Table 5: Operating Keys; Key
Operating and Maintenance Instructions – 15 Operating and Maintenance Instructions Front Panel The front of the switch is shown in Figure 7. Figure 7: Front of the Switch Operating Keys The operating keys are described in Table 5. Table 5: Operating Keys Key Description I / O Turns the power on ( I)...
Page 21 - Operating and Maintenance Instructions – 16; LED; Rear Panel; Figure 8: Back of the Switch; External Switch Module Connections; External Switch Module without TTL Input Controls
Operating and Maintenance Instructions – 16 Table 6: Status LEDs LED Description REM Indicates that the GPIB or RS232 interface is in Remote mode. All front-panelkeys except Local are locked out. LOCK Indicates that the SB switch is in Local Lockout mode. This mode prevents theLocal key from returni...
Page 22 - Operating and Maintenance Instructions – 17; Figure 9: Switch Setup without TTL; External Switch Module with TTL Input Controls; The setup for a switch with TTL is shown in Figure 10.; Figure 10: Switch Setup with TTL; Sample Driver Application: Electrical Equivalent of Driver; A sample driver application is shown in Figure 11.
Operating and Maintenance Instructions – 17 Figure 9: Switch Setup without TTL External Switch Module with TTL Input Controls The setup for a switch with TTL is shown in Figure 10. Figure 10: Switch Setup with TTL Sample Driver Application: Electrical Equivalent of Driver A sample driver application...
Page 23 - Operating and Maintenance Instructions – 18; Do not exceed 100 mA per driver.; Powering Up the Switch; To power up the switch:; Using and Selecting a Channel; Figure 12: Using a Channel
Operating and Maintenance Instructions – 18 Figure 11: Sample Driver Application: Electrical Equivalent of Driver Caution Do not exceed 100 mA per driver. Powering Up the Switch To power up the switch: 1. Connect the switch to the AC power source with the AC power cord provided. 2. Set the power swi...
Page 24 - Operating and Maintenance Instructions – 19; Setting the GPIB Address
Operating and Maintenance Instructions – 19 To select a channel: 1. Press the ▲ or ▼ key to scroll to the channel number required. The switch mechanism advances to the channel when the key is released. In SB-C models (SB1CXXXXX+2XXXXXXXX), the channel number displayed is the currentchannel number co...
Page 25 - Operating and Maintenance Instructions – 20; Controlling the Switch Locally
Operating and Maintenance Instructions – 20 applications. All drivers are controlled by remote commands (use the Driver port at the back ofthe switch). Driver 1 can also be controlled locally by the Driver 1 key. To control driver 1 locally: 1. Press the Driver 1 key to toggle driver 1 on and off fo...
Page 26 - Operating and Maintenance Instructions – 21; Calibrating the Switch; Figure 13: Removing the Connector Panel
Operating and Maintenance Instructions – 21 2. At the computer, initialize the serial port to 1200 baud, eight bit ASCII character code, one stop bit, and no parity. Use the following MS-DOS 2 Qbasic program as an example: OPEN "COM2;1200,N,8,1" FOR RANDOM AS #1PRINT #1, "CLOSE 5"PRI...
Page 27 - Operating and Maintenance Instructions – 22
Operating and Maintenance Instructions – 22 6. Reinstall the connector panel, guiding the fibers back to ensure that they do not bend sharply.
Page 28 - Programming Guide – 23; Programming Guide; GPIB Pin Assignment; The GPIB pin assignment is shown in Figure 14.; Figure 14: GPIB Pin Assignment; Tighten the connector lock screws by hand. Do not use a screwdriver.; To display or edit the GPIB interface address:
Programming Guide – 23 Programming Guide The following programming instructions for the SB switch are intended for users who arefamiliar with the GPIB interface and how to send or receive messages over a device. Adetailed description of the GPIB interface is contained in ANSI/IEEE Std. 488.1-1987 IE...
Page 29 - Programming Guide – 24; GPIB Interface Functions; Table 7: GPIB Interface Functions; Mnemonic; Pin Assignment
Programming Guide – 24 3. Press the GPIB ADDR key. The new address is activated and stored. To leave the GPIB address unchanged, press the Driver 1 key. GPIB Interface Functions The GPIB interface functions are listed in Table 7. Table 7: GPIB Interface Functions Mnemonic Function SH1 source handsha...
Page 30 - Programming Guide – 25; Table 8: RS232 Interface Specifications; Figure 16: Driver Pin Assignment; Operation and Query Commands
Programming Guide – 25 Table 8: RS232 Interface Specifications Name Symbol Pin Number Signal Direction transmitted data TxD 2 out received data RxD 3 in request to send RTS 8 out clear to send CTS 7 in data terminal ready DTR 6 out signal ground SG 5 — The data protocol is permanently set to 1200 ba...
Page 31 - Programming Guide – 26; All
Programming Guide – 26 • A command is contained in a message, and messages can contain more than one command, each one separated by a semicolon (;). For example, CLOSE 6;XDR 2 1 <CR><LF> contains two commands. • All GPIB commands must end with the terminating sequence <CR> <LF&g...
Page 32 - Programming Guide – 27
Programming Guide – 27 XDRS i Drivers Control Sets all eight relay drivers according to the binary conversion of i. The binary weight of thedrivers is as follows: • Driver 1 = 1 • Driver 2 = 2 • Driver 3 = 4 • Driver 4 = 8 • Driver 5 = 16 • Driver 6 = 32 • Driver 7 = 64 • Driver 8 = 128 Add together...
Page 33 - Programming Guide – 28
Programming Guide – 28 XDRS? Drivers Returns the states of all drivers in a binary-coded integer. LRN? Learn Returns a string containing three commands that, if sent, reset the switch to its current state,for example, CLOSE i;XDRS k;SRE l, where i represents the current path number, krepresents the ...
Page 34 - Programming Guide – 29; Operation Complete; Status Reporting and Service Request Control; Condition Register; Table 9: Condition Register; Status Register; Table 10: Status Register
Programming Guide – 29 OPC? Operation Complete Returns the status of the input buffer. • 1 = the input buffer is empty, for example, all commands have been executed • 0 = the input buffer is not empty, for example, commands are still pending IDN? Identifier Returns a string that identifies the manuf...
Page 35 - Programming Guide – 30; Table 11: SRQ Mask Register; SRQ Mask Register; GPIB Programming Examples
Programming Guide – 30 error request error available error • Bit 7 (self-test error) is set if a calibration error is detected after power-up or after the self-test query (TST?) is executed. At all other times it is 0. • Bit 6 (service request) is set when the interrupt request logic of the switch d...
Page 36 - Programming Guide – 31; Sending Commands
Programming Guide – 31 equipped with a National Instruments 3 GPIB interface board, with National Instruments Universal Language Interface drivers loaded. The commands that control the GPIB are similarto Hewlett Packard 4 HP Basic commands. Most other controller board manufacturers provide basic out...
Page 37 - Programming Guide – 32; Generating a Service Request Interrupt; RS232 Programming Examples
Programming Guide – 32 W ENDPRINT sr ' print final value of sr END Generating a Service Request Interrupt This example tests the service request interrupt function. It unmasks the settled bit in theSRQ mask register and selects a channel. An interrupt is generated when the switch reachesthe channel....
Page 38 - Programming Guide – 33; The RS232 interface cannot receive an SRQ interrupt.; This example queries and displays the current channel setting.; Reading the Status Register; ' clear status register; Setting the Interface Command Set
Programming Guide – 33 equipped with a serial port. COM port 2 of the computer is designated as the serial port and isconnected to the switch. Before using any of these examples, ensure that the active interface command set is SB. The RS232 interface cannot receive an SRQ interrupt. The RS232C comma...
Page 39 - Programming Guide – 34; Table 12: SC Switch Command Set; Syntax; Table 13: Response Messages for SC Switch Commands; Message
Programming Guide – 34 To change the command set: 1. Press and hold the GPIB ADDR key while the SB switch powers up. The active interface setting is displayed. 2. Press the ▲ key to scroll to the required command set, for example, SB, SC, or SX. 3. Press the GPIB ADDR key to save the setting. SC Ser...
Page 40 - Programming Guide – 35; Table 14: SX Switch Command Set; Table 15: Response Messages for SX Switch Commands
Programming Guide – 35 Table 14: SX Switch Command Set Syntax Function An switch to channel n Sn set driver n Cn clear driver n Bk configure drivers with binary code k E enable unit to assert SRQ interrupt after completing each command D disable SRQ interrupt except when an error occurs R remote mod...
