Clear-Com Tempest 900 Reference Manual

54 Tempest®900 4-Channel Wireless Intercom System
2-Wire Wiring Schemes
Wiring schemes vary, and it is important to ensure that the cables are wired correctly for proper system operaon. When
Tempest is congured for a parcular manufacturer’s system, Tempest routes the signal to internal circuitry that conforms
to the requirements of that system. The 3-pin XLR connectors on the back of the Tempest BaseStaon can have very
dierent characteriscs depending on the seng of the slide switch, as can be seen in the table below.
3-Pin Wiring Scheme and Line Characteriscs
1 2
1
1
2
2
3
Clear-Com
AudioCom
RTS
1 COMMON
2 POWER
3 AUDIO
1 COMMON
2 AUDIO(-) & POWER
3 AUDIO(+) & POWER
1 COMMON
2 AUDIO 1 & POWER
3 AUDIO 2
MALE
MALE
MALE
Input Impedance 200Ω
Output Level 1.0 Vrms
Bridging Impedance >10 kΩ
Call Signaling:
Send 12 ±3 VDC
Receive 4 VDC Min
Power voltage 30.0 VDC
Input Impedance 300Ω
Output Level 1.0 Vrms
Bridging Impedance >10 kΩ
Call Signaling:
Send 20 kHz ±100 Hz, 5 mVrms
Receive 20 kHz ±800 Hz, 100 mVrms
Power voltage 24.0 VDC
Input Impedance 200Ω
Output Level 0.775 Vrms
Bridging Impedance >10kΩ
Call Signaling:
Send 20 kHz ±100 hz, 240 mVrms
Receive 20 kHz ±800 Hz, 100 mVrms
Power voltage 28.0 VDC
3
3
Note for 2-Wire RTS Users: RTS TW (2-Wire) systems support two intercom channels on a single XLR cable. When connecng
an RTS TW system, only one cable is required for two intercom channels. When set to RTS mode, both of the 3-PIN XLR
connectors (2 male and 2 female) for channels A&B and C&D are paralleled together. RTS intercom channel 1 is placed on
Tempest intercom channel A, and RTS channel 2 is placed on channel B.; RTS intercom channel 1 is placed on channel C and
RTS channel 2 is placed on channel D.
Note for 2-Wire Clear-Com and Balanced (Audiocom) Users: For Clear-Com and Balanced 2-Wire intercoms, use the A, B, C,
and D male or female 3-pin (XLR-3M/F) connectors on the rear panel to connect up to four intercom channels. The male and
female connectors for each channel are loop-through connecons and are the same point electrically. Each channel of a Clear-
Com or Balanced 2-Wire system requires one separate cable for connecon to one Tempest channel.

Clear-Com Tempest 900 Specifications

General

Brand	Clear-Com
Model	Tempest 900
Category	Intercom System
Language	English