User's Manual

14221-1200-4010, Rev. B
55
10. CONTROL HEAD INSTALLATION
The remote-mount Unity XG-100M mobile radio must be connected to a control head to provide the
operator-to-radio interface. Two (2) different control heads are available — the CH-100 control head and
the CH-721 System model control head. See Figure 10-1 through Figure 10-4 respectively. A control
head is interfaced to the radio via a CAN cable. Each control head is powered and fused by an individual
DC power cable (i.e., the control head is powered separately from the radio).
10.1 SELECTING THE MOUNTING LOCATION
When selecting a location for the control head, first observe the safety and operator-convenience related
information presented in Section 6.1 on page 29. Always consider and include clearance for the
microphone’s connector that must mate to the mic connector on the front panel of the head, and clearance
for the connectors/cables that must mate to the connectors on the rear panel of the head. The control head
can be mounted under or on top of a mounting surface (typically the vehicle’s dash) as space permits
using the standard U-shaped mounting bracket.
The size and weight of the control head necessitate less stringent mounting requirements than the radio.
However, like the radio, the control head must be mounted to a mechanically-rigid surface. The control
head must not vibrate when the vehicle is in motion and it must remain stable during normal operations
by an operator (i.e., button presses, knob rotation, excessive tugs on the mic cord, etc.). If the control head
is mounted to a plastic dash panel, either fender washers or a field-fabricated metal backing plate should
be used to mount the head’s bracket to the plastic dash panel.