Atkinson Dynamics AD-28X-MV, Руководство по установке

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24 Vdc:
When connecting the intercom to 24 Vdc, either the positive (+) supply conductor must be fused at
the source with a 1/2 A fuse or a power‑limited power source must be used.
The AD‑28X‑MV is capable of sending DC power to another unit which is mounted in a remote
location without local power. 24 Vdc is available from pins 4 and 5 of the terminal block. It can be
run along with the signal lines to an intercom in a remote location. Only one unit should share the
power supply of another unit in any installation.
NOTE
Connect positive (+) supply conductor to pin #4 of terminal block. Connect negative (‑) supply
connector to pin #5 of terminal block.
Figure 7 in the wiring diagrams section shows how two intercoms can be hooked up if no remote
power is available.
SURGE PROTECTION:
Metal Oxide Varistor (MOV) devices are used to protect the audio lines and the remote control
line. The intercom must have Earth Ground terminated to it to ensure surge protection.
The output amplifier of the AD-28X-MV offers full short circuit protection and overheat protec‑
tion.
MODEL AD-28X-MV SPECIFICATIONS
Operating Voltage 24Vdc, 120 Vac and 240 Vac 50/60 Hz
Current Draw Voltage Operating Standby
24 Vdc 260 mA 62 mA
120 Vac 163 mA 70 mA
240 Vac 82 mA 35 mA
Amplifier Specifications
Frequency Response (‑6 dB) 150 Hz to 12 kHz
Input Impedance 3400 Ohms
Max. Output Voltage
Sine Wave:
Unbalanced Output 7.5 Vrms
Square Wave:
Unbalanced Output 9.5 Vrms
Temperature Range for Ordinary Locations – 31° F to +150° F ( – 35° C to +66° C)
Temperature Range for Hazardous Locations +41° F to +149° F (+5° C to +65° C)
Fuse Type GMC‑1/2 1/2 A, 250 V
Call Button Actuated Dry Contact Rating 500 mA at 125 Vac
1.25 A @ 24 Vdc
Weight
Shipping 10 lb, 11 oz
Net 9 lb, 4 oz
Housing Dimensions 6.5” (16.5 cm) W x 9.88 " (25.1 cm) H x
3.88 " (9.9 cm) D
Conduit Entrances Dual 1/2 " ‑14 IPS
Housing Material Aluminum
Color Gray
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