Bogen PI35A - Manual

3 Introduction Description Bogen Models PI35A and SI35A are 25-station intercom systems (SI35A is expandable to 75 stations). They canprovide facilities with two-way communication, emergency paging, time tones and background music or otheraudio program material to speaker-equipped locations. Both sy...

4 MCP35A Front Control Panel 1 2 3 4 5 6 7 8 9 RELEASE 1 . CONSOLE MIC - Used as microphone 1 or in conjunction with the emergency page or press-to-talk/release-to- listen (intercom) push-buttons. This mic is always used for two-way intercom calls, using the green button, and emergency paging using ...

5 MCP35A Rear Control Panel 1 . MIC 1 - Connections for an external mic (MIC 1 ). When the PROGRAM DISTRIBUTION button MIC 1 is pressed, the microphone connected here becomes active. As shipped from the factory, a link is installed between the HI and CONS MIC terminals. This makes the CONSOLE MIC ac...

6 SBA225 Speaker Selector Front Panel 1 . ROOM SELECTOR SWITCH - Position of the room switch controls the type of audio program material delivered to the room speaker. 2. CALL ANNUNCIATORS - Lights to indicate a room has placed an intercom request from a call switch. 3. PROGRAM BUSES - A room speake...

7 Basic System Operation Communicating With a Selected Speaker Use the following steps to talk and listen to a room that has its switch set to the “C” (down) position. 1 . Place the switch of the room that you wish to talk and listen to in the “C” (down) position. 2. Make sure the PROGRAM DISTRIBUTI...

8 Basic System Hook-Up 4-Wire Speaker Connections to the SBA225 4-wire speaker connections (3-conductor + shield) is recommended for all new installations. The figure below shows theconnection to the back of the SBA225 when using a 4-wire system. Note: You must use Bogen connectors for this connecti...

9 Call-In Switches Two call-in switches, CA 1 0A and CA 11 A, are recommended for use with the SI and PI. The CA 1 0A is a momentary push switch that has circuitry to light the annunciator light on the SBA225 room selector panel. The CA 11 A has the same capa- bility as the CA 1 0A and includes a pr...

10 Speakers and Speaker Wiring The MCP35A control panel of the SI and PI products is designed to use 25-volt distributed speakers. These speakers haveline-matching transformers with various power level taps. 8-ohm speakers or speakers without line-matching transformerscannot be used with the SI and ...

11 Advanced Hook-Ups External Emergency Mic It is possible to use a microphone (Model MBS 1 000A) with a contact closure to make an emergency announcement. The TELCO terminal on the back of the MCP35A control panel can be used to remotely trigger an emergency page on thesystem. Whenever the TELCO te...

13 External Booster Amp An external booster amplifier (Bogen Model BPA60) can be connected when the application requires more than 35 watts.Using an external amplifier disconnects the internal 35W amp of the MCP35A. To install, connect a RCA cable from theMCP35A LINE OUT jack to the Hi-Z input jack ...

TWK35 1 Wire Converter The model TWK35 1 is an adapter used in instances where there is existing 3-wire (2-conductor + shield) room wiring. The TWK35 1 cannot be used with the SCR25A module. If 3-wire operation using the TWK35 1 wire converter is desired, CA 1 0A call switches must be used (CA 11 A ...

SCR25A Call-In Module The SCR25A module can be added to allow the annunciator indicators to light from a simple SPST call-in switch (Bogenmodel CA 1 7). All call-in switches must go back to the SI or PI on separate lines. It will not allow annunciator illumination from parallel connected call-in swi...

SI35A Model Option Enhancements The SI35A has provisions to add up to 2 additional SBA225 switchbanks. Simply remove the blank panels and replace witha switchbank. Make connections as shown in the diagram below. An auxiliary music source, such as the Bogen CR 1 00A Radio/Cassette Player or TP30D Tun...

Special Adjustments Gain Adjustments Screwdriver-adjustable INPUT GAIN controls are located on the rear panel for MIC 1 , MIC 2, AUX, TEL PAGE, TALK and LISTEN. Set the controls so that signal clipping cannot occur. Proceed as follows: 1 . Apply input(s) to the desired channel(s). 2. Set the corresp...

Internal Jumper Selections Internal jumpers are provided for phantom power (Mic 1 /Mic2), Telco Page/Mic 2 input selection, monitor speaker muting, and privacy tone defeat. Warning: High voltages are present within the MCP35A. The unit should not be operated without covers in place. To change jumper...

Troubleshooting Guide MCP35A Troubleshooting Procedure If a problem exists on the MCP35A, certain steps should be taken to find the problem. This test relates to the ProgramAmplifier (All-Call or Emergency). The first indication of a problem will appear on the three level indicators at the front oft...

System Specifications Rated Output: Program — 35W RMSIntercom — 20W RMS Frequency Response: Program — + 1 ,-3dB from 80Hz to 1 5kHz Intercom — Shaped for maximum intelligibility Distortion: Less than 1 % at rated power and bandwidth Inputs: Two Lo-Z balanced MIC inputs; Hi-Z unbalanced AUX input; Te...

Warranty Bogen ’ s PI35A and SI35A are warranted to be free from defects in material or workmanship for two (2) years from the date of sale to the original purchaser. Any part of the product covered by this warranty that, with normal installation and use, becomesdefective will be repaired or replace...