Clear-Com AB-120 - Manual (Page 11)

Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
1 - 5
REAR PANEL CONNECTORS AND CONTROLS
The rear panel of the AB-120 has the following connectors and
controls.
• Headset connectors
• Microphone Out Connector
• Male/Female Pair of Intercom Connectors
• IFB Input Connector
• 30 VDC Power Connector
• Channel Select Switch
Figure 1-3: AB-120 Rear Connectors
Headset Connector
The standard AB-120 is shipped with a headset connector designed
for use with any type of announcer headset. Connection is via a
Switchcraft™ XLR-6F connector on the unit. The pinout of the headset
connector is as follows:
1. Microphone Lo (-)
2. Microphone Hi (+)
3. Headphone Common
4. Left Headphone (+)
5. Right Headphone (-)
6. Microphone Shield
The headset should have a separate shielded twisted pair of wires
directly to the microphone, otherwise some earphone to microphone
crosstalk may be experienced.
Headset Mic Out IFB
Channel Select
Pin 2 (RTS)
Pin 3 (CC)
+
30V 0.45A MAX
Intercom/Talkback