29
9. SPECIFICATIONS
[VS-900DI]
Power Source
24 V DC ±10%/1 A, 2-pole screwless terminal*
2
Maximum Cable Length
1.5 km (including the additional master station line from the VS-900DI) when
to Exchange
the cable guage is AWG22
Maximum Number of
4 cards per exchange, 64 cards per system (16 tie-lined exchanges)
Connectable VS-900DI
Cards
Function Key Input
One each of [C], [PTT], [Xfer], and [Test] keys, dry contact, 5 V DC/0.5 mA,
contact resistance: 50
Ω
or less, 8-pole screwless terminal*
2
Commuication Line
1 line for VS-900 exchange (VS-900MS card) and 1 line for MS-900 master
station, 1 6-position/4-contact modular jack for each line
In-use Indication Output
Open collector output, 24 V DC/approx. 100 mA, 2-pole screwless terminal*
2
Electret Microphone
Microphone sensitivity: –75 to –65 dB*
1
, phantom power supply (power supply
Input
can be cut off), 2-pole screwless terminal*
2
Speaker Output
Speaker impedance: 8
Ω
, power output: 1 W maximum, 2-pole screwless
terminal*
2
Headset Connection
Microphone sensitivity: –75 to –65 dB*
1
, speaker impedance: 200 to 400
Ω
,
detection jack contact input [Det.]: 5 V DC/10 mA, contact resistance: 10
Ω
or
less, 8-pole screwless terminal*
2
(Headset can also be turned on/off using the
manual switch instead of the jack contact input.)
PC Interface
RS-232C D-sub connector (9 poles, female type)
Note:
The design and specifications are subject to change without notice for improvement.
• Accessories
Ferrite clamp SFC-8 ................................... 2
Modular cord (3 m) ..................................... 1
*
1
0 dB = 1 V(rms)
*
2
Usable cable
Bared-core length: 5 – 6 mm
Cross section area: 0.14 – 2.5 mm
2
Summary of Contents for VS-900DI
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