Discrete Configuration
The battery life calculations, in years, for some discrete sensors are shown in the table below.
Table 2: Battery Life in Years
Manufacturer
Device
Model
Boost Voltage
Warmup Time
1
Banner
Optical
SM312DQD-78419
5V
4 ms
2
Turck
Inductive Proximity
Bi10U-M30-AP6X-H1141
10V
10 ms
Battery Life in Years
Sample and Report Rates
62.5 ms
125 ms
250 ms
500 ms
1 second
2 seconds
16 seconds
1
0.97
1.67
2.62
3.74
4.75
5.49
6.28
2
0.20
0.40
0.72
1.27
2.05
2.99
5.07
Note, battery life calculations are based on the sensor operating 24 hours a day, 365 days a year.
SM312DQD-78419
Bi10U-M30-AP6X-H1141
0
1
2
3
4
5
6
7
62.5 ms
125 ms
250 ms
500 ms
1 sec
2 sec
16 sec
DX81 Battery Life (Y
ears)
Sample and Report Rates
For each sensor characterized, a boost voltage and warmup time was specified. The sample and reports rates were varied to calculate
the estimated battery life. For example, a Banner Optical sensor, model SM312DQD-78419, set to a boost voltage of 5 volts, a warm-up
time of 4 milliseconds, and a sample and report rate of 16 seconds, should have a battery life of just over 6 years.
The curves for discrete devices represent a “worst case” as far as battery use because we are assuming for each sample of the sensor’s
output a change in state has occurred (e.g., target present to target absent or vice versa), sending a radio message from Node to Gate-
way. No messaging occurs unless there is a change to report. Actual battery life depends on how many state changes actually occur.
All battery life calculations are approximations based on a strong radio signal. Weaker radio connections and missed packets will de-
crease the battery life.
SureCross Wireless I/O Network Manual
76
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rev. I
