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Part #SIM100MLP

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  • Measures voltage of each battery terminal with refernce to chassis
  • Reports battery voltage
  • Reports accurate estimates of the isolation status while the battery is having large voltage variations
  • When the battery is not connected or if the battery voltage drops below 15 V, the parallel combination of the two reported isolation resistances (for the high and low sides) is still accurate, as well as the sum total of the reported high and low capacitances
  • Measures and reports modeled leakage resistances per model adapted by the safety standards ISO6469-1, FMVSS §571.305 and others
  • Reports calculated isolation resistance in Ω/V per requirements of the safety standards
  • Measures and reports the value of capacitance from each battery terminal to chassis
  • Calculates and reports the energy stored by the total capacitance between the battery and chassis
  • Reports uncertainty for all measured and calculated values
  • Continuously monitors connections of the voltage sense lines to the battery terminals; reports inadequate connections
  • Continuously monitors connection of the unit to chassis; reports inadequate connection
  • Provides high immunity to common-mode noise that can be present on the battery terminals
  • Provides nonvolatile storage for the value of the maximum (design) voltage of the battery (used in calculations of the isolation resistance and stored energy). If the actual observed battery voltage is higher than the set maximum voltage, the higher value is used in the calculations of the isolation resistance and stored energy
  • Provides nonvolatile storage for calibration of the voltage measurements and other parameters; all reported measurements have their respective calibration parameters applied automatically
  • Provides built-in galvanically isolated and intrinsically leakage-safe excitation source
  • A single CAN message provides sufficient information for determination of the safety status of the system
  • Initializes in under 6 seconds
  • Fast detection of a rapid change in insulation resistance: The SIM100 detects an insulation value change in less than 5 secs
  • Warning and Fault alerts provided in the STATUS byte for low insulation resistance values


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)
Maximum Operational Voltage​ +/- 1000 V​
Component Ratings​ Automotive
Module operating temperature range -40 °C to +125 °C for electronics (-40 °C to +105 °C with connectors)
Part Number Voltage
SIM100MLP-XXX SIM100MLP module. See table below for XXX options.

Ordering Options (XXX)

CAN bus Voltage Connectors & CAN Termination
A = 500kbit/s
B = 250kbit/s
K = 1000 V A = Terminated
B = Not terminated
SIM100 System Requirement



Minimum HV System Y-Capacitance

(Chassis to each of HV + and HV -)

100 nF

Y-Capacitance must be present for the proper functioning of the SIM100 family

Minimum HV System Voltage​

(HV + and HV -)

15V SIM100 is optimized for operation when the HV system is active

Allowable System Insulation ​

(Chassis to each of HV + and HV -)

​​2.72 Megaohm SIM100 couples to HV network via series resistors and represents an intrinsic load between the HV system and chassis

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