Base Unit Manual
2019 Cervis, Inc.
1
1.0
SmaRT BU-xH6R Base Unit
The SmaRT BU-xH6R Base Unit features six Form C relay outputs. Each Form C relay contact
can switch up to 8 amperes at 250 VAC or VDC. Using Direct Sequence Spread Spectrum
(DSSS) wireless technology at 900 MHz or 2.4 GHz, the base unit robustly links with a handheld
remote control unit in congested radio environments at extended ranges. All controlled
apparatus connections
—and base unit power—are made using two cables with keyed, heavy
duty 12-pin connectors, through which output signals are also ported. Five status/diagnostic
LEDs shown in Figure 1 below determine the state of the unit.
Figure 1. BU-xH6R LEDs
BU-xH6R Input Power
Input power depends on the type of BU-xH6R used:
BU-xH6R-xxx-HVU accepts input voltage of 100
–240VAC @ 47–440Hz, or 120–370VDC.
The
–HVU power option uses a universal converter that can accept either high-voltage AC
or DC input. The converter is not polarity sensitive.
BU-xH6R-xxx-LVD accepts 7
–32VDC.
The
–LVD option is polarity sensitive to:
Enhance low input voltage behavior.
Prevent resets
—due to sagging battery voltage when an engine is started—from
occurring.
BU-xH6R-xxx-LVA accepts 7
–28VAC, 50/60Hz.
The
–LVA option permits operation using readily available step-down control voltage
transformers for power.
An optional Controller Area Network (CAN) interface feature is available for networking multiple
base units in more complex control applications. Contact Cervis, Inc. for more information.
An RS-232 interface is available for use with SmaRT Connect. Due to pin limitations, it is not
available if the CAN option is selected.
Green pulse/sec
Health OK
Green when any
output is active
TX/RX Amber
while transceiving
Amber Power OK
CAN RX/TX Amber
while transceiving
