Description
The Sendyne SIM100MLP is the first high voltage
isolation monitoring device for EV/HEVs capable
of operating correctly even when the battery is
active, and experiencing large voltage variations, no
variations, or even if the battery is not connected.
The SIM100MLP continuously monitors the
isolation resistance between a vehicle’s IT (Isolated
Terra) power system and chassis for deterioration of
isolation and potentially dangerous levels of leakage
current. The module detects not only resistive leakages
but also capacitively stored energy that could be
harmful to human operators.
Due to a proprietary, patented and patent pending advanced
algorithm, the module is capable of detecting
all sources of leakage, including multiple, simultaneous
symmetrical and asymmetrical faults, as well as
resistive paths between the chassis and points in the
battery with the same potential as the chassis. In
the case of an isolation fault, the unit identifies the
position of the fault in relation to the battery’s
terminals. Battery-connected VX1 (Vp) and VX2 (Vn)
voltage inputs can measure ±1.1 kV (max, see ordering
options for other ranges) in reference to Chassis
(0 V). Communications are achieved via an isolated
CAN 2.0B interface and the unit operates over a wide
temperature range of –40 °C to +105 °C. The Sendyne
SIM100MLP was designed as a component for systems
complying with ISO 6469-3:2011-12, UL 2231-1,
UL2231-2, IEC 61557-A, CFR 571.305 and other ap plicable
standards.

Applications
― Monitoring ungrounded (IT) DC
power systems for hazardous resistive and capacitive
leaks
― Electric & hybrid vehicles
― Charging stations
― Energy storage facilities
― Battery Management Systems