Operating Manual Owner's manual

2 Instrument identification
8
2.2 Type designation
ATH-EXx-. .- .
ATH Surface-mounting thermostat (with capillary)
ATH-EXx Marking for explosion-protected version
ATH-EXx-..-. Code number for the function:
2=0Temperature monitor (TW)
with changeover contact.
Limit adjustable within the housing.
7=0Temperature limiter (TB)
with changeover contact and restart lock-out.
Limit adjustable within the housing.
7-F =0Temperature limiter (TB)
with changeover contact and restart lock-out.
Limit is factory-set.
20 =0Fail-safe temperature monitor (STW)
with changeover contact.
Limit adjustable within the housing.
70 =0Break-proof protection temperature limiter (STB)
with change-over contact and restart inhibit.
The limit value can be set by the installing engineer–
before commissioning the plant – within the housing.
70-F =0Break-proof protection temperature limiter (STB)
with change-over contact and restart inhibit.
Limit value set to a fixed value at the factory.
ATH-EXx-. .- .F=0Designation for factory-set limit setting.
Extra code (TZ) 679: Min. operating temperature: -50°C