SENS MicroGenius S2/S4 Technical Manual
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PERFORMANCE SPECIFICATIONS
MicroGenius
®
S2/S4 is a switchmode, regulated, filtered, microprocessor-controlled, current limited battery
charger designed for heavy-duty industrial service. Chargers may be configured for three primary applications: 1)
DC power and standby battery charging for industrial control and safety systems, 2) DC power supply and battery
charging for marine environments and 3) quick recharge and long life maintenance of engine start batteries. The
charger is provided in two enclosure sizes (S2 and S4) and with various output options. Every model provides
Modbus and J1939 communications, 5 alarm relays, easily readable alpha-numeric display and keypad. Optional
features include breakers, supplemental surge protectors, TCP/IP Modbus with native USB, IP22 drip shield as well
as multiple outputs configured to different output voltages. Charger specifications are detailed in the table below,
see following sections for installation and operation instructions.
Table 1 – Specifications
AC Input
Voltage, Frequency
90-265 VAC , 47-63 Hz
Input Current
S2: 8 Amps maximum (at 100 VAC)
S4: 16 Amps maximum (at 100 VAC)
Protection
Supplementary overcurrent protection fuse (non-replaceable);
transient protected to EN61000-4-5 level 4
2-pole circuit breaker (optional with S4)
Supplemental surge protection (optional with S4). Surge protective
device is field replaceable.
Efficiency
Up to 93%; meets CA Energy Commission (CEC) Title 20 Appliance
Efficiency Regulations
Power factor
>.95 typical at maximum rated load current and boost charge voltage
DC output
Voltage
12/24V nominal; multiple output assignments (optional); adjustable
from 0-34V using front panel keypad or computer to charger
cable/native USB (optional) and SENS Setup Utility Kit (SENS p/n
209254 plus SENS software available at
www.sens-usa.com)
Current
15-60 Amps, see section 2. Output power reduced by approximately
20% for output voltages greater than 24 VDC when input voltage is
less than 170 VAC.
Soft start
Charger gradually increases current with a maximum of 5 seconds to
full-required output
Charging modes
Multi-stage, including float, boost and commissioning charge modes
Battery type programs
Flooded lead-acid, AGM, Ni-Cd, VRLA, ultracapacitor
DC power supply
operation
Delivers fast-responding, stable, well-filtered DC without battery
Current limit
100% current capability subject to temperature limits and AC voltage
limits; field adjustable
Charging characteristic Constant voltage, current limited; patented Dynamic Boost control
Line/load regulation
+0.5%
Output ripple
<30mVrms with or without battery
Battery temperature
compensation
On-board sensor controls changes in output voltage when
temperature is between 0°C and +40°C at a rate of – 0.18% per
degree C; optional remote battery temperature probe (SENS p/n
209481); remote temperature probe connections provided for each
output
Output protection
Current limit, supplementary overcurrent protection fuse (non-
replaceable), transient protected
2-pole circuit breaker (optional with S4)
Supplemental surge protection (optional with S4). Surge protective
