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TM TM
LEVEL LEVEL
SYSTEM A SYSTEM B
SET SET
TO
TO
4W 4W
-15 -12 -9 -6 -3 0 +3 +6 +9 +12
-15 -12 -9 -6 -3 0 +3 +6 +9 +12
TO TO
2W 2W
2
0dB TW CHAN SEL 0dB 2
TW CHAN SEL
-10dB +4dB
-10dB +4dB
1 BAL 1 BAL
+12dB +8dB
+12dB +8dB
12 BAL 12 BAL
POWER 4W LEVEL 4W LEVEL
REF SEL
REF SEL SSA-424A
User Instructions
SSA-424A Dual Digital Hybrid
ADAM, ADAM CS, and Zeus Intercoms
9350-7824-000 Rev C 10/2008
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PROPRIETARY NOTICE SHIPPING TO THE MANUFACTURER The product information and design disclosed herein were originated by All shipments of product should be made via UPS Ground, prepaid (you and are the property of Telex Communications, Inc. Telex reserves all may request from Factory Service a different shipment method). Any patent, proprietary design, manufacturing, reproduction, use and sales shipment upgrades will be paid by the customer. The equipment should rights thereto, and to any artic
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Table of Contents CHAPTER 1 CHAPTER 3 Description and Specifications ....................1 Operation ...................................................13 General Instructions ..................................13 General Description ...........1 Operating Notes for ADAM, ADAM CS and General Features ...............1 Zeus Intercom Systems ..............................13 Front and Back Panel Descriptions ............2 Front Panel ....................2 Back Panel .....................2 Specifica
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2
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CHAPTER 1 Description and Specifications end to concerns about echo and feedback when interfacing General Description 2-wire lines. The SSA-424A Dual Digital Hybrid interfaces two, 2-wire Peak Reading Level Meters: Quick and accurate visual intercom lines to two, 4-wire intercom lines. Unlike earlier audio level adjustment. No extra setup equipment or analog hybrids, the SSA-424A features advanced digital guesswork is required. signal processing to achieve automatic nulling of the 2-wire
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Description and Specifications LEVEL LEVEL SYSTEM A SYSTEM B SET SET TO TO 4W 4W -15 -12 -9 -6 -3 0 +3 +6 +9 +12 -15 -12 -9 -6 -3 0 +3 +6 +9 +12 TO TO 2W 2W +4dB 2 2W CHAN SEL +4dB 2 2W CHAN SEL 0dB +8dB 1 BAL 0dB +8dB 1 BAL -10dB +12dB OFF OFF -10dB +12dB OFF OFF 12 BAL 12 BAL 4W LEVEL 4W LEVEL TM POWER REF SEL REF SEL SSA-424A Telex Communications, Inc., Made in U.S.A. AUX AUX J5 POWER +5V 3A +15V 1.6A -15V 0.3A J4B J4A +5V RTN +15V -15V J1B J1A J3B J3A RTN J2B J2A 2 WIRE SYSTEM 4 WIRE SYST
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Specifications Specifications 2-Wire Ports Input / Output Impedance 5,000 ohms, nominal Operating Level Audiocom: 1 V , nominal RMS RTSTW/ClearCom: 775 mVRMS, nominal 4-Wire Ports Input Impedance 10k ohms, nominal Output Impedance 200 ohms Operating Levels -10 dBu, 0 dBu, +4 dBu, +8 dBu, +12 dBu System to System Frequency Response 200 Hz to 3.5 kHz, ±4 dB THD: ≤ 1% @ channel output with nominal input Environmental Operating Temp -20°C to 50°C (-4°F to 122°F) Storage Temp -40°C to 85°C (-40°F to
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Description and Specifications 4
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CHAPTER 2 Installation 2. On the SSA-424A front panel, set the 4W LEVEL REF Mounting SEL switches to the +8 dB position. Place the SSA-424A on a desktop, or install it in an equipment rack using an RTS MCP Rack Mount Kit. Several Audio Connections for the Other 4-wire rack mount options are available. There are no special Communications Systems ventilation requirements for the SSA-424A, but allow for 1. Construct 9-pin or RJ-11 cables to connect from the ventilation around the power pack.
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Installation the audio input and output levels of your 4-wire system. Pin 5 Balanced Audio - 4-wire input If you don’t know the levels, select the +8 dB position for Pin 6 No Connection now. 2. On the SSA-424A front panel, set the 4W LEVEL REF SEL switches to the position which most closely matches FIGURE 2. Rack Mount Configurations channel to one 4-wire channel, which channel is 2-Wire Audio Connections determined by the front panel 2W CHAN SEL switch. If your TW system cable is only car
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2-Wire Audio Connections NOTE: The SSA-424A features internal DC isolation. You can therefore connect to the SSA-424A to powered TW cables, and it will not draw any power from the TW system. 2. On the SSA-424A front panel: For System A and System CH 1 AND 2 B, set the 2W CHAN SEL switch to the appropriate FROM AUDIOCOM INTERCOM SYSTEM position. To interface to TW channel 1 select position 1; for TW channel 2, select position 2. NOTE: If the System A or System B will not be used, set the 2W
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Installation NOTE: TW systems must provide termination on the audio If your intercom system is equipped with a UIO-256 channel. (Universal Input/Output) Frame, you can also use that for connections (Table 2 on page 10 and Table 3 on page 10). Balanced Configuration Pin 1 No Connection As an alternative to using the GPI, you can use external components to send and receive call signals as described in Pin 2 Balanced Audio + Input/Output “Call Signal Connections for other 4-wire Communications
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4-Wire Call Signal Connections FIGURE 5. Call signal connections for ADAM, ADAM CS, and Zeus Intercom Systems. This example uses GPI outputs #1 and #2 and GPI Input #1; however, you may use any other available GPI inputs and outputs. The Call Enable/Inhibit connection is optional. It gives you the ability to disable call signalling using a GPI output. However, when connecting to a Clear-Com intercom system, if an enable/inhibit switch is not connected, a jumper must be installed for any other
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Installation TABLE 2. UIO-256 GPI Input Connector (J7) a GPI INPUT NUMBERS GPI INPUT PIN NUMBERS Input Height UIO-256 Frame #1 UIO-256 Frame #2 UIO-256 Frame #3 UIO-256 Frame #4 Common (5-18 VDC) 117 33 49 9 34 218 34 50 10 35 319 35 51 11 36 420 36 52 12 37 521 37 53 13 38 622 38 54 14 39 723 39 55 15 40 824 40 56 16 41 925 41 57 1 26 10 26 42 58 2 27 11 27 43 59 3 28 12 28 44 60 4 29 13 29 45 61 5 30 14 30 46 62 6 31 15 31 47 63 7 32 16 32 48 64 8 33 a. Dependent on UIO-256 DIP Switch SW1 Set
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4-Wire Call Signal Connections TABLE 3. UIO-256 GPI Outputs Connector (J5) a GPI OUTPUT NUMBERS RELAY CONTACT PIN NUMBERS NORMAL NORMAL UIO-256 UIO-256 UIO-256 UIO-256 CLOSED (NC) COMMON OPEN (NO) FRAME #1 FRAME #2 FRAME #3 FRAME #4 CONTACT CONTACT CONTACT 15 31 47 63 35 10 37 16 32 48 64 36 11 12 a. Dependent on UIO-256 DIP Switch SW1 Settings for Input/Output Range as summarized in the UIO-256 manual. Call Signal Connections for other 4-wire Communications Systems 4-wire Call Send and Call
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Installation 2-Wire Call Signal Call Signal Connections for Audiocom, RTS TW and Clear-Com The call signals are superimposed on the audio signal, so no separate call signal connections are required. However, make sure that a call enable switch or jumper is installed for Clear-Com applications as shown in Figure 6 on page 11 and Figure 7. Call Signal Connections for Other 2-Wire Communication Systems Any other 2-wire device must be able to generate and receive a 20 kHz signal superimposed
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CHAPTER 3 Operation General Instructions Operating Notes for ADAM, ADAM CS and Zeus Intercom Systems 1. Attach the power pack to the SSA-424A and apply power to all components. Confirm the power indicator is lit on 1. In AZedit use port alpha setup to name each 4-wire the SSA-424A front panel. intercom port that is connected to the SSA-424A. Choose names which help indicate which 2-wire line is being NOTE: The power indicator flashes when a call signal is interfaced. received from a 2-wir
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Operation 4. Optional call signal input using the GPI � In AZedit, click GPI In on the toolbar. This opens the GPI Setup screen. � Whichever GPI Input you are using for 4-wire call receive, select that GPI Input from the list (double- click). This will open the Edit GPI Input window. � In the Port Alpha list box, select the intercom port that is named in step 1. � In the Key Number box, type 1. This selects key 1 at the intercom you specified in the previous step. � Select Talk Key. � Click D
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Appendix A Internal Access Mode Dip Switch Settings 1. Remove six screws from the back cover. S301 controls the operating mode for System B and S302 controls the operating mode for System A. 2. Remove the top cover. This provides access to all internal adjustments. Settings are summarized as follows: 3. For option card installation, slide the circuit board out toward the back to remove it from the bottom cover. TABLE 1. Mode DIP Switch Settings Telex Communications, Inc., Made in U.S.A. AUX A
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Call Signal Option Card Installation Use these instructions to install a Call Signal Option Card in a SSA-424A that was originally ordered without it. 1. Disassemble the SSA-424A as previously described. 2. Assemble the standoffs to the circuit board using the supplied screws and lock-washers. 3. Connect the supplied power cable from J8 on the option card to J303 on the main board of the SSA-424A. 4. Insert the connectors on the option card into the connectors on the main board. 5. Use the
