9

Preliminary

Rev 1.1a

© 2021 Sendyne Corp

Sendyne SIM100MLP

profile load, accelerated and repeated multiple times,

is simulated at the battery terminals. The resulting

battery voltage is shown in the Battery voltage chart.

The greyed areas indicate the 60 s intervals when the

resistor is disconnected. The histogram shows the

distribution of SIM100 reports in the periods when

the resistor is connected.

The green vertical lines in the histogram show the

actual isolation resistance when the 250 k

Ω resistor is

connected. As can be seen in the histograms, the er-

ror between the average reported value and the actual

value is less than 1%.

Variable loads

The SIM100 is the only product today that can oper-

ate flawlessly in extremely noisy environments when

the load of the IT power system is active. This is an

important safety feature especially in commercial

environments where the electrical equipment is in use

most of the time. The SIM100 will provide accurate

estimates even while the power system experiences

violent swings of 10s or 100s of Volts.

Figure 11 shows the test setup and SIM100 responses

under a battery load corresponding to an accelerated

driving profile. In the test circuit a 250 k

Ω resistor

is connected and disconnected every 60 s. A driving

RF = 250 kΩ

V

BAT

Test Circuit

Load

CY,P

CY,N

RI,N

RI,P

SIM100

0

50

100

150

200

250

300

350

0

120

240

360

480

600

720

840

960

1080

1200

1320

Time (s)

SW

SW

ON

SW

ON

SW

ON

SW

ON

SW

ON

SW

ON

SW

ON

SW

ON

SW

ON

SW

ON

SW

ON

0

10

20

30

40

50

60

70

80

Histograms of SIM100 R

F estimates

(120 reports collected during each period SW is ON)

Green line

indicates

actual R

F value

1% error

Battery voltage - Accelerated driving profile

Figure 11: Testing of SIM100 under an accelerated driving profile