Explosion-protection relevant information
CI/FAM540-X1
VA Master FAM540
EN - 15
4.2
Special installation instructions for devices with limit signal transmitter or transmitter
All installation instructions and safety requirements are contained in the respective chapters of
the operating instructions.
The meters can be used in a variety of applications:
• As an intrinsically safe meter in zone 1, if connected to an intrinsically safe circuit.
• As a pressure resistant meter in zone 1, if connected to a non-intrinsically safe circuit.
• As an non-incendive meter in zone 2, if connected to a non-intrinsically safe circuit.
Depending on the model, the meter may be designed to be installed in one of the applications
listed. If you plan to use a meter that was installed in one Ex protection class in a different Ex
protection class, some precautions must be taken before connecting voltage to the meter.
Important
Required measures see chapter 4.2.1 and 4.2.2
4.2.1 Analog indicator with limit signal transmitter FAM540-B/C/D
*) possible only if the max. signal levels of U
M
≤
60 V (e.g., PELV or SELV circuits) were not previously exceeded.
1. Protection
Class
2. Protection Class
Measures
IS or Ex ia *)
• 500 Vac
/1min
Test between terminals 51/52 and 41/42 and
terminals 51/52/41/42 and the housing.
• Visual inspection: no explosion, no damage.
XP or Ex d
U
M
= 60 V
NI or Ex nA
• 500Vac
/1min
Test between terminals 51/52 and 41/42 and
terminals 51/52/41/42 and the housing.
• Visual inspection: no explosion, no damage.
XP or Ex d
• Visual inspection: no damage to threads (cover, surface, ½"
NPT cable input), cable gland, glass, housing, locking device for
cover, proper cable, etc.
IS or Ex ia
NI or Ex nA
• Special precautions are not necessary.
IS or Ex ia *)
• 500 Vac
/1min
Test between terminals 51/52 and 41/42 and
terminals 51/52/41/42 and the housing.
• Visual inspection: no damage.
NI or Ex nA
U
M
= 60 V
XP or Ex
• Visual inspection: no damage to threads (cover, surface, ½"
NPT cable input), cable gland, glass, housing, locking device for
cover, proper cable, etc.
