User Manual

1. Your actual current capacity will vary based on the type of load, the length and size of wires, power supply
capability and other factors.
2. Input Output connections and Jumper Settings
J1 Jumper Connections
The Simple-H ships with two jumpers used to select the enable and current sense options of
the unit. By default these are installed on EA and CA for combined enable and current sense
operation (see below). If separate enable and/or current sense is desired the jumper should
be moved to the EAB or CAB position. The jumpers should always be mounted in one
position or the other. If they are not mounted the B-side power chip will not be enabled and/or
the B-side current reading will not be available.
The jumpers should always be placed across the rows of pins in line with the label on the
PCB.
EA EA input on CN1 enables BOTH power chips
EAB EA enables the M1 chip and EB enables the M2 chip
CA CA output on CN1 reflects BOTH power chips (combined output)
CAB CA output reflects the M1 chip current and CB reflects M2 chip current
CN1 is the primary control input/output connector for the unit. There is no electrical isolation
between the power chips and the input connector so care should be taken when connecting to
sensitive equipment. The Simple-H ships with either an 8-position screw terminal block in this
position or various pin headers for specific user connector applications. The Screw terminal
may be removed if desired and replaced with a 0.1” spacing pin header of the users’ choice.
CN1 Input / Output Connections
PA PWM-A input to M1 power chip may be pulse-width modulated or DC
PB PWM-B input to M2 power chip
EA Enable A & B when EA jumper is on or Enable A-side only when EAB jumper is on
CA A-side (M1) current sense output if CAB is mounted or the combined current sense
if CA is mounted.
EB Enable-B only used if EAB is mounted
CB Current sense B only used if CAB is mounted
– Battery negative (Ground) – Connect to signal source ground for voltage reference
+
Battery positive - Output to external voltage regulator – Do not connect to an
external battery or voltage source!