Operating instructions

3-14 Amplifier Setup
Powering and Surge Protection
In conventional applications, MBV3-100*s are powered through the input port.
CAUTION!
To avoid damage to the hybrids, it is recommended that you remove the input pad (JXP-IN) before you apply power to
the MBV3-100*.
A 20-ampere, blade-type fuse is furnished in the three active ports of the dual output amplifier
module and provides overcurrent protection for AC power applied to the input. You can power
the MBV3-100* from the output without passing power through to the input port. To block
power from the input port, remove the 20-amp fuse (Fin) located in the input port as illustrated
in Figure 2-9.
WARNING!
To avoid possible injury to personnel or damage to the equipment, remove 60/90 volt AC power from the system
before you remove any components from the housing.
The MBV3-100* is shipped from the factory configured for 38 through 90 VAC powering as
described in Section 2, “Overview”. To configure the MBV3-100* for 55 VAC through 90 VAC
operation:
1 Remove the power-supply cover.
2 Move the LO/HI selector (jumper J1 on the power-supply board) from the LO to HI position.
Figure 2-8 illustrates the jumper location.
3 Re-install the power-supply cover and torque the screws to 10 to 12 in-lbs.
MBV3-100* Installation and Operation Manual