Optional Modules Product Description
XPIQ PN 51013:C 7/01/03 23
1.7.2 XPIQ-RMI Remote Microphone Interface Board
The optional XPIQ-RMI board, which plugs into connector J8 on the XPIQ-MB motherboard,
provides a connection for the RM-1 or RM-1SA remote microphone assemblies. The XPIQ-RMI is
required only if the remote microphone is installed.
The remote microphone can be placed at a maximum distance of 1,000 feet (300 m) from the
XPIQ-RMI. A minimum of two pairs of twisted, shielded wires are required to provide power to
and receive low level audio from the remote microphone assembly.
• TB2 Terminal 1: +24 VDC power to microphone
• TB2 Terminal 2: DC common power return from microphone
• TB1 Terminal 1: + audio input from microphone
• TB1 Terminal 2: - audio input from microphone
• TB1 Terminal 3: shield drain wire of microphone cable
All circuits and wiring are supervised and plug-in terminal blocks are provided for ease of
installation and trouble shooting. The R-47K resistor is included and must be installed when
connecting the RM-1 microphone assembly. In order for the RM-1(SA) to function correctly, it
must receive power from the XPIQ-RMI terminals TB2-1 & TB2-2.
XPIQ-RMI Features
• Power supply connections for remote microphone
• Sense circuit for push-to-talk (activation switch on the microphone)
• Low level audio input from remote microphone
• Wiring supervision
• Removable terminal blocks
5
4
3
2
1
4
3
2
1
TB2
TB1
Figure 1.10 XPIQ-RMI Remote Microphone Interface Board
JP1 Connector Plugs Into
J8 Connector on XPIQ-MB
N.C.
N.C.
VDC Common
+24 VDC Power
N.C.
N.C.
Shield
Mic In -
Mic In +
XPIQRMIb.CDR
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