Peripheral Installation
External Speaker Unit (HESB) Options
6-24
Strata DK40 I&M Manual Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
.
Talkback Amplified Speaker Option
The talkback amplified speaker option enables a talkback speaker to be provided in areas
where a telephone is not needed. In this configuration, the HESB is connected to the 600Ω
(duplex) output Page RCA jack on the Base Unit and is used as the amplifier and speaker.
A door phone unit (MDFB) is connected to the HESB, and serves as a microphone to provide
talkback operation. (The MDFB push-button is inoperative, and the unit serves only as a
microphone for talkback and not as the normal door phone.)
Note
The 600Ω Page RCA jack is a two-way (duplex) page output compatible with most
commercially available talkback amplifiers–door phone not required for talkback.
Figure 6-13 HESB/Amplified Speaker Wiring
Jumper Wires:
DK40 KSU
TB1
1-2
5-8
6-7
TB2
3-4
5-6
Modular
Connector
May Be Used
Volume Control
TBI
3
4
Voice
3
4
Internal Wiring:
6 5 4 3 2 1 6 5 4 3 2 1
Not Used
Voice
12V 0V
Note
• The 600 ohm page output sends
three types of signals during
system operation:
• Voice page
• Background music
• Night ringing
12345678910
TB1
Door Phone
123456
TB2
HESB (Rear View)
12V
VDC
0V
Jumpers
1514
240 VAC to 12 VDC
Power
Supply
600 ohm
Page RCA
Jack Output
654321
Twisted Pair (CW1308 0.5mm)
Western Electric
4 or 6 Way LJU
(-)
(+)
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