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Although every effort has been made to insure that this manual is current

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TC1540

RS-232/RS-422/RS-485

FIBER OPTIC MODEM

User's Manual

Содержание TC1540

Страница 1: ...iven or implied that this document is error free or accurate with regard to any specifica tion TC Communications Inc reserves the right to change or modify the contents of this manual at any time with...

Страница 2: ...ion 11 Unpacking the Unit 11 Equipment Location 11 Installation Procedure Summary 11 Installation Example for 2 wire RS 485 application 12 Chapter 3 Troubleshooting 14 General 14 Power On LEDs Flash 1...

Страница 3: ...shooting Optic options include 850nm and 1310nm Multimode wavelengths 1310nm or 1550nm Single Mode wavelengths The optional optic redundancy feature can provide maximum reliability for crucial applica...

Страница 4: ...lock RS 422 485 output 2 wire RS 485 terminal block Signal Ground DIP Switches for Diagnostics and Application Setup LED Indicators for Electrical Optical Input Output Status Optic Transmitter TxA Opt...

Страница 5: ...is is idle state Input Off RS422 Voltage on terminal terminal s voltage RS232 Negative input voltage Logic 0 or Space RS422 Voltage on terminal terminal s voltage RS232 Positive input voltage O n Opti...

Страница 6: ...w both channels are in the receiving or transmitting mode at all times The RS 485 Driver Receiver transition time is determined by three DIP switches on the TC1540 The local unit s RS 485 transceiver...

Страница 7: ...to an echo effect on the electrical connection With the addition of a termination resistor at the beginning or end of the electrical bus this echo effect is greatly reduced The termination resistors a...

Страница 8: ...d Pins OUT OUT are outputs or input output for 2 Wire RS 485 Figures 9 2 wire RS 485 Connection Logic Diagram RS 422 RS 485 4 Wire Termination Connection Transition Control Rcv User s Device W1 Termin...

Страница 9: ...9 TC1540DUser sManual Rev 1 2 Rs232 Drv Rcv TC1540 To From Fiber User s Device Tx Rx IN OUT SIG GND SIG GND Figures 10 2 wire RS 232 Connection Logic Diagram...

Страница 10: ...Launch Power 20dBm 850nm 1310nm MM 62 5 125 m 16dBm 1310nm Single Mode 9 125 m Receiver PINDiode typicalSensitivity 36dBm 850nm 1310nm MM 62 5 125 m 36dBm 1310nmSingleMode 9 125 m Launchpower sensitiv...

Страница 11: ...may be reversed Reversed power polarity will not cause any damage to the unit B Connect fiber optic cables between the local remote units as shown in Figure 12 the local unit s optic Tx connects to t...

Страница 12: ...s half duplex the polling device and responding RTU take turns transmitting Electrical Interface 2 wireRS 485 Data Rate 9600Baud Async Optic Redundancy Utilized DIP Switch settings SW1 SW2 SW3 SW4 SW5...

Страница 13: ...13 TC1540DUser sManual Rev 1 2 Figure 12 4 Wire RS 485 Installation Diagram 4 wire RS 485 Quick Installation local remote Units...

Страница 14: ...If Multimode cable is used in a Single Mode application the test results could be erroneous and confusing Calculating the Fiber Optic Loss Budget The fiber optic link and or connectors are frequently...

Страница 15: ...Is the unit s Power LED Lit Conduct a Remote Loopback Test Conduct a Remote Loopback Test from Opposite Direction Yes Does the TD LED Light when Transmitting Check Pin Assignments Check Term ination R...

Страница 16: ...on a TC1540 unit with a 2 wire RS 485 interface due to its half duplex operation however the Signal Generator feature can be used to facilitate troubleshooting The DIP switch illustrations on each uni...

Страница 17: ...om optic Tx to optic Rx Set all the DIP switchs to the Left position Connect a BERT tester to the TC1540 according to Fig 15 Set the tester up as a DTE device The BERT tester should indicate a SYNC si...

Страница 18: ...s Set the tester up as a DTE device if RS 530 or RS 449 interface is used TD and RD LEDs should light on the TC1540 indicating the status of the looped signal The BERT tester should indicate a SYNC si...

Страница 19: ...module At least two 2 optical jumper cables patch cords with appropriate connectors Procedure Set up the bench test as shown in Figure 16 On the remote unit set SW2 RMTLB to the Right position and con...

Страница 20: ...RS 232 RS 422 or 2 or 4 wire RS 485 System Bit Error Rate 1 in 109 or better Visual Indicators POWER O SYNC TD RD COLL DRVMD RS485 Power Source standard 12VDC 250mA optional 24VDC 125mA optional optio...