Siemens SENTRON 3WL10 Manual page 10

Overview
①
Position signaling switch of the circuit breaker in the guide frame (COM PSS), not shown in the figure.
②
Breaker Connect module, external power supply
③
Module slots for communication modules or digital I/O modules
④
IOM040 digital I/O module
⑤
Ready-to-close signaling switch for communication (COM RTC) - only available for the version with a spring energy
store
⑥
Actuation module for remote operation (COM ACT) - only available for the version with a spring energy store
⑦
Electronic trip unit (ETU)
⑧
Metering function
Communication 3WL10 Air Circuit Breakers & 3VA27 Molded Case Circuit Breakers
System Manual, 06/2019, L1V30499596021-01
1.6 3WL10 / 3VA27 circuit breakers
Introduction
9