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© 2021 Sendyne Corp

Sendyne SIM100MLP

Sendyne® Sensing Products Family

Sendyne Isolation Monitor For

Unearthed (IT) DC Power Systems

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 leak-

ages but also capacitively stored energy that could be

harmful to human operators.

Due to a proprietary, patented and patent pending ad-

vanced algorithm, the module is capable of detecting

all sources of leakage, including multiple, simultane-

ous 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 V

X1 (Vp) and VX2 (Vn)

voltage inputs can measure ±1.1 kV (max, see order-

ing 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 sys-

tems complying with ISO 6469-3:2011-12, UL 2231-1,

UL2231-2, IEC 61557-A, CFR 571.305 and other ap-

plicable standards.

Operating Specifications

Parameter

Value

Power supply

+4.8 to +53 V (variable, accommodating +5 V to +48 V power supplies)

Interface

CAN 2.0B isolated, 120 Ω termination resistor (optional)

Voltage measurement range

2 Channels: ±1100 (max) V/channel continuous, no signal clipping

Rating

Automotive

Power consumption

< 375 mW (+5 V power supply), < 475 mW (+48 V power supply)

Module operating temperature range

-40 OC to +125 OC for electronics (-40 OC to +105 OC with connectors)

Applications

― Monitoring ungrounded (IT) DC

power systems for hazardous resistive and capaci-

tive leaks

― Electric & hybrid vehicles

― Charging stations

― Energy storage facilities

― Battery Management Systems