JETI model EXPANDER SW 4 User Manual

USER MANUAL

EXPANDER SW 4

By JETI model s.r.o. 17. 4. 2015

Návod k obsluze: Switch Expander

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1. Introduction

The Expander SW4 is an extension for magnetic and RC switches and is designed for switching
multiple devices simultaneously. The JETI model company produces a wide range of devices that can
be switched by magnetic switch or RC switch. The Expander SW4 allows you to combine the switching
duties so that several devices can be controlled using one only element. Furthermore, some outputs are
optically isolated to prevent interference. This makes it is possible to isolate control of devices which
may be sensitive to electric interference.

2. Switch Expander circuitry

Expander SW4 has on output for a magnetic or RC switch and 4 outputs, 3 of them are optically
isolated (OPTO1-OPTO3). The output that is not optically isolated is connected to the magnetic or RC
switch directly, including the power supply (Master input). The optically isolated outputs must be
powered separately. One of the optically isolated outputs is inverted (e.g. for SBEC40) – OPT INV.