Clear-Com KB-211 User Manual
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Clear-Com KB-211 User Manual

Clear-Com KB-211 User Manual

Two-channel speaker stations
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KB-211/KB-211GM
TWO-CHANNEL SPEAKER STATIONS

USER MANUAL

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Summary of Contents for Clear-Com KB-211

  • Page 1: User Manual

    KB-211/KB-211GM TWO-CHANNEL SPEAKER STATIONS USER MANUAL...
  • Page 3 The dual-action talk button operates in electronic momentary or latching mode. Monitoring can be done through the headset, the integral speaker, or both simultaneously. The KB-211 offers both visual and audible call signaling to attract the attention of operators.

  • Page 4: Quick Start

    Connect the intercom lines. If only one intercom line is to be connected, set Option Switch 1 to the ON or CLOSED position. Install the KB-211 into the four-gang outlet box or V-Box. (For ™ additional information, refer to the Clear-Com PL-Pro System Installation Manual.)
  • Page 5 Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations Channel Select Panel Mic Call Intercom Level Headset Program Level Sidetone Talk Speaker KB-211GM S p e a k e r S t a t i o n FIGURE 1: Front Panel 1—Talk Button and Lamp The Talk button activates the microphone feed to the selected intercom channel.

  • Page 6: Tone Alert

    The Tone Alert will not sound if a call signal is originated at the KB-211 station or if the Speaker ON/OFF Switch is turned off. The Tone Alert plays through both the speaker and headset if the Speaker ON/OFF Switch is turned on.
  • Page 7 This switch selects the intercom channel (A or B) on which the speaker station is active. 10—Headset Connector The headset connector is located on the front panel. All Clear-Com headsets are recommended for use with the KB-211. The Clear-Com PT-4 Push-to-Talk Microphone or the HS-6 Telephone Handset will also plug into the headset connector.

  • Page 8: Internal Adjustments And Connections

    11—Panel Mic Connector (KB-211GM only) Clear-Com recommends the GM-9 (9 in. long) and GM-18 (18 in. long) plug-in panel microphones be used with the KB-211GM. Both are the electret type. The 1/4-in. phone jack on the microphone mates with the Panel Mic receptacle on the KB-211GM’s front panel.

  • Page 9: Option Switches

    Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations P3 Must be P2 Must be installed if installed if no option no option P1 Call P1 Call on on Both Selected View from top of KB-211 Front Panel FIGURE 2: Internal Adjustments and Connections 13—Call Alert Tone Level Control...

  • Page 10: Intercom Line Connection

    Clear-Com Intercom Systems 1—Single Channel In some installations, the KB-211 is intended to be used only with one intercom channel. Setting the Single Channel switch to the ON position will connect the KB-211 to the one intercom channel regardless of the position of the front-panel Channel selector.
  • Page 11 Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations Pin 1 Channel A Connector KB-211 Intercom Connector FIGURE 3: One-Channel Cable Wiring Pin 1 Channel A Channel B KB-211 Intercom Connector Connectors FIGURE 4: Two-Channel Cable Wiring 17—Program Input A three-terminal, plug-on connector provides the program input to the station.
  • Page 12 P1 and P3 must be removed. In the KB-211GM, P2 is replaced by the VOX module. Save these jumper plugs for possible future use. Note: The KB-211 will not operate without either these jumper plugs or the optional modules installed.
  • Page 13 Ch. A Ground TW Option Channel Switch Ch. B 4-Wire Input Ch. A 16 VAC Rectifier Power 2-Wire / 4-Wire Select Ch. B 4-Wire Output 4-Wire Ch. A Option FIGURE 6: KB-211 Block Diagram © Clear-Com Intercom Systems 1999 Rev. A...

  • Page 14: Troubleshooting

    System does not operate. Talk Light does not come on when Talk button is pressed. Scenario 1 The KB-211 doesn’t have an intercom connection. If the EB-4W 4-Wire Option Module is connected, the KB-211 may not be receiving AC power. Solution: Check connections and cable.
  • Page 15 Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations Scenario 2 The KB-211 has an internal failure. Solution: Unit requires servicing. • Speaker does not operate, but the Talk Light comes on when Talk button is pressed. Scenario 1 The Speaker switch is turned off, the volume knob is turned all the way down, or the channel switch is set to the unused channel.
  • Page 16 KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems Solution: If only one intercom line is connected, set Option Switch 1 to the ON or CLOSED position to link both channel switch positions to the same intercom line. Scenario 5 A headset extension cord was used.
  • Page 17 Excessive DC loading of intercom line. Solution: Remove any audio transformers or other equipment that may be connected across the intercom line. If equipment other than Clear-Com intercom equipment must be connected to the intercom line, please contact Clear-Com application or service personnel for information or recommendations.

  • Page 18: Parts Lists

    KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems Parts Lists Parts List for the KB-211 / KB-211GM Main PCB and Chassis Capacitors Value Type Voltage Tol. Part # Designator Aluminum 150021 C8 C47 Ceramic Disc 1.4KV 150029 Tantalum 150032 Tantalum 150044...
  • Page 19 Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations 8.25K OHM 1/10 411477 12.1K OHM 1/10 411493 R19 R38 15.0K OHM 1/10 411502 20.0K OHM 1/10 411514 R24 R30 R31 R34 R39 56.2K OHM 1/10 411557 R37 R41 100K 1/10 411581 R6 R12 R49 R50...
  • Page 20 KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems Switch DPDT P.B. MINIATURE W/LONG PLUNGER 510107 S4 S5 Switch DPDT ROCKER PC MOUNT W/BRACKET 510111 Switch DIP SWITCH PIANO 3 POS 510114 Switch SPDT ROCKER, PC MNT W/BRACKET 510125 Wire 4 CONNDUCTOR FLAT CABLE...
  • Page 21 Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations FIGURE 8: Main PCB Component Layout © Clear-Com Intercom Systems 1999 Rev. A...
  • Page 22 KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems This page is a place holder. Rev. A © Clear-Com Intercom Systems 1999...
  • Page 23 FIGURE 9: KB-211 Schematic © Clear-Com Intercom Systems 1999 Rev. A...
  • Page 24 KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems This page is a place holder. Rev. A © Clear-Com Intercom Systems 1999...
  • Page 25 Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations FIGURE 10: VOX PCB Component Layout © Clear-Com Intercom Systems 1999 Rev. A...
  • Page 26 KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems FIGURE 11: VOX Schematic Rev. A © Clear-Com Intercom Systems 1999...

  • Page 27: Technical Specifications

    Clear-Com Intercom Systems KB-211/KB-211GM Two-Channel Speaker Stations Technical Specifications Headset Microphone Pre-Amp Input Type: Dynamic Impedance: 1k ohm Input Level: -55 dBV nominal; -10 dBV max. Gain from headset mic to intercom line: +41 dB Panel Microphone Pre-Amp (KB-211GM only)

  • Page 28: Power Requirements

    1.22 lbs. (0.56 kg) Notice About Specifications While Clear-Com makes every attempt to maintain the accuracy of the information contained in its product manuals, that information is subject to change without notice. Performance specifications included in this manual are design-center specifications and are included for customer guidance and to facilitate system installation.

  • Page 29: Clear-Com Limited Warranty

    This warranty is the sole and exclusive express warranty given with respect to Clear-Com products. It is the responsibility of the user to determine before purchase that this product is suitable for the user's intended purpose.

  • Page 30: Non-Warranty Repair

    Clear-Com Intercom Systems Non-Warranty Repair Equipment that is not under warranty must be sent prepaid to Clear-Com. If requested, an estimate of repair costs will be issued prior to service. Once repair is approved and repair of equipment is completed, the equipment will be shipped freight collect from the factory.
  • Page 32 4065 Hollis Street, Emeryville, CA 94608 (510) 496-6666 Fax (510) 496-6601 Manual Part Number 810253 Rev. A...

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Kb-211gm

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