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Metasys AFL-R Manual

Audio fiber link
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AFL-R and AFL-T Audio Fiber Link
General Description
Installation
• CAB-3 Mounting
• ABS-8R Mounting
• Fiber Optic Link
Applications
• Adjusting the Audio Gain Level
• Notes
Troubleshooting
© 1999 Johnson Controls, Inc.
Code No. LIT-445220
Preliminary—This information may change.
Fire Management Accessories Manual 445
Miscellaneous Section
Technical Bulletin
www.johnsoncontrols.com
Issue Date 0399
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Summary of Contents for Metasys AFL-R

  • Page 1 Fire Management Accessories Manual 445 Miscellaneous Section Technical Bulletin Issue Date 0399 AFL-R and AFL-T Audio Fiber Link General Description Page Installation • CAB-3 Mounting • ABS-8R Mounting • Fiber Optic Link Applications • Adjusting the Audio Gain Level • Notes Troubleshooting ©...
  • Page 2 Preliminary—This information may change. Miscellaneous—AFL-R and AFL-T Audio Fiber Link...

  • Page 3: General Description

    ATG-2. The AFL-T then converts the low-level audio signal to modulated light, which is transmitted through multimode fiber optic cable. The AFL-R accepts that modulated light on the other end of the fiber optic cable. The AFL-R then converts the modulated light to low-level audio which, in turn, feeds AA-30, AA-100, or AA-120 amplifiers and (if required) the next daisy-chained AFL-T.
  • Page 4 Preliminary—This information may change. Miscellaneous—AFL-R and AFL-T Audio Fiber Link...

  • Page 5: Installation

    The AFL-T or AFL-R may be mounted in the Listed CHS-4, CHS-4L, mounting chassis, or an ABS-8R enclosure (backbox). When mounting on a CHS-4L, use the inner position. When the AFL-T or AFL-R is mounted on the CHS-4 and CHS-4L, adequate clearance above the board is required.
  • Page 6 2. Rest the top of the board on the mounting tabs at the top of the CHS-4 and attach using two 4-40 screws. CHS-4L Use the following instructions to mount the AFL-T or AFL-R to the CHS-4L. 1. Screw the two 4-40 standoffs on the top row of PEM studs on the CHS-4L.
  • Page 7 1. Determine which knockouts are required to wire the AFL-T or AFL-R and remove the designated knockout. 2. Mount the ABS-8R. 3. Place the AFL-T or AFL-R on the PEM standoffs in the ABS-8R four 4-40 screws (refer to Figure 4). 4. Draw appropriate wiring and fiber cable in through knockouts.
  • Page 8 Figure 5 illustrates the Audio Fiber Optic Link. The attenuation of fiber Fiber Optic optic cabling between the AFL-T or AFL-R must not exceed a 10 dB Link limit. At the system design stage, apply the following steps to establish the limit: 1.
  • Page 9 Up to 50 AFL-T transmitters may be connected to the output of an AMG-1, AMG-E, or ATG-2 low-level audio source. A maximum of ten amplifiers may be fed from the AFL-R output and a maximum of ten AFL-Ts may be fed by single AFL-R. The maximum series connection of Audio Fiber Links is two AFL-T/R pairs deep, as shown in Figure 5.
  • Page 10 3. Adjust the gain on all amplifiers that are connected in parallel on the low-level audio circuit with the first AFL-T. 4. Proceed to the AFL-R terminating the first stage fiber optic link. If the AFL-R feeds a second stage AFL-T, observe the Level LED. Add one or two 470 ohm resistors in parallel with the AFL-R output if necessary to lower the signal level.
  • Page 11 121110 9 8 7 6 5 4 3 2 1 AA-30/AA-30E AA-30/AA-30E MPS-24A or MPS-24A or MPS-24A or MPS-24AE MPS-24AE MPS-24AE Main Control Panel Cabinet Remote Amplifier Cabinet Remote Amplifier Cabinet Origin of Main Audio Riser afl_3cabinets Figure 5: Audio Fiber Optic Link Miscellaneous—AFL-R and AFL-T Audio Fiber Link...
  • Page 12 6 5 4 3 2 1 To 24V Non-resettable UL Listed Power Supply Output Connected to the Same Reference (Battery Negative) as the Audio Source (AMG-1, AMG-E) aflwire1 AMG-1 AMG-E Figure 6: Connecting the AFL-T to the AMG-1/AMG-E Miscellaneous—AFL-R and AFL-T Audio Fiber Link...
  • Page 13 6 5 4 3 2 1 To 24V Non-resettable UL Listed Power Supply Output Connected to the Same Reference (Battery Negative) aflwire2 ATG-2 as the Audio Source (ATG-2) Figure 7: Connecting AFL-Ts to the ATG-2 Miscellaneous—AFL-R and AFL-T Audio Fiber Link...
  • Page 14 Power Supply Output Connected Optic Link to the Same Reference as the Audio Source Second Stage AFL-T aflwire3 In this figure, AFL-R is the audio source Figure 8: Connecting the AFL-R to Amplifiers and Second Stage AFL-Ts Miscellaneous—AFL-R and AFL-T Audio Fiber Link...

  • Page 15: Troubleshooting

    The AFL-R LED displays various intensities of green depending on optical power delivered (the lower the optical signal level, the dimmer the intensity of the LED). The AFL-R LED will glow steady red if the link is not receiving enough light or if the fiber is disconnected.
  • Page 16 Preliminary—This information may change. Notes Controls Group www.johnsoncontrols.com 507 E. Michigan Street FAN 445 P.O. Box 423 Fire Management Accessories Manual Milwaukee, WI 53201 Printed in U.S.A. Miscellaneous—AFL-R and AFL-T Audio Fiber Link...

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