Module 4ZW-PK is a device of the JOTAFAN system that enables to increase the number of sections of microclimate controllers (sent by the VIRGO, TERMISTAT and COMBO controllers equipped with an RS-485 bus). The module has got four independent output sections of ‘ON/OFF’ type (a voltage-free output, C and NO relay contacts) which kind of operation (ventilation/heating) and turning on/off point are configured in the master controller.

It is possible to connect up to 3 Modules 4ZW-PK to the VIRGO controller. Thanks to this solution it is possible to extend the controller by 12 sections of ‘ON/OFF’ type. There is a possibility to connect  up to 2 Modules 4ZW-PK to TERMISTAT-..-485-LCD controllers and as a result connect 8 additional ventilation sections controlled in ‘ON/OFF’ mode.

1. Controllers:

• alarm signal (‘silent’ alarm, as in case of lack of communication with other external modules).

2. Module 4ZW:

depending on the microswitches settings:

• turning off all sections,

• continuation of the last control,

• turning on Section 1 and turning off the remaining sections,

• turning on all four sections.

In case of power supply failure of Module 4ZW an alarm will also be activated by the master controller.