1.2.2.1.5 Battery for Multi-Turn
The battery for Multi-Turn must be placed separately, there is no dedicated space for it in Circulo. The pins
for the battery are incorporated into the connector of Encoder 1.
Note
Usually, all multi-turn encoders are connected to the same battery to facilitate potential replacement.
1.2.2.1.5.1 Suitable batteries
Primary cells with a nominal voltage of 3.3 V - 5,5 V are required as the battery voltage must always stay
above 3.0 V during operation. Such batteries are available for moderate as well as for extended temperature
range (e.g. 125 °C). Suitable cells are mainly based on lithium thionyl chloride (LiSOCL2). They feature high
energy density, high output voltage stability and operating life up to 25 years. The self-discharge per year is
typically in the range of 1 %.
Form
Factor
Description
1/2 AA A cylindrical cell with 25.2 mm length and 14.5 mm diameter. Nominal capacities up to 1.2 Ah
are available.
1/6 D A flat wafer cell, comparable to a coin cell. Diameter 32.9 mm, height 10.2 mm. Nominal
capacities up to 1.7 Ah are available.
1/10 D A flat wafer cell, comparable to a coin cell. Diameter 32.9 mm, height 6.5 mm. Nominal
capacities up to 1.0 Ah are available.
2450 A flat wafer cell, comparable to a coin cell. Diameter 24.5 mm, height 5.8 mm. Nominal
capacities up to 0.55 Ah are available.
ER22G75,
BEL Wafer
A flat wafer cell. Diameter 22.8 mm, height 7.5 mm. Nominal capacities up to 0.42 Ah are
available.
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