RPM Series Rev. E1, 01/19
4
Automation Products Group, Inc.
• Description
The RPM utilizes reed switches in the instrument’s stem and a permanent
magnet in the oat. As the oat rises or falls with the level of the liquid,
the magnet inside the oat acts on the reed switches inside the stem and
provides a resistive-chain output. The RPM is also available with optional
electronics that convert the resistance output into a 4-20mA signal.
• Handling of the Intrinsically Safe RPM Series
Electrical ratings; 12 to 24 Volts DC, 4 - 20 ma
Exia Class I Division 1; Groups C, D T3C (Max. Temp. 85°C)
Vmax = 30VDC, Imax = 130ma, Ci = 3nF, Li = 0uH
ATEX Directive: 0344
Sira 11ATEX2136X
II 1G Ex ia IIB T3 Ga
-40°C ≤ Ta ≤ +85 °C
Ui ≤ 30 V, Ii ≤ 130 mA, Pi ≤ 1 W, Ci ≤ 3 nF, Li ≤ 0 mH
IECEx CSA 16.0018X
Ex ia IIB T3 Ga
-40°C ≤ Ta ≤ +85 °C
All repairs and adjustments of the RPM must be made by the factory. To
modify, disassemble, or alter the RPM on site is strictly prohibited. Do not
loosen any joints, with the exception of the housing cover for electrical
connection.
• Handling of the Explosion-Proof RPM Series
Electrical ratings; 5 to 24 Volts DC, 100 ma
Class I Division 1 Groups C & D (Max. Temp. 40°C.)
Class I Division 2; Groups C & D (Max. Temp 85°C.
Class I Zone 1; Ex d IIB / AEx d IIB T3
Probe may be wired as a Non-Incendive device in Class I Division 2 Groups C
& D areas.
All repairs and adjustments of the RPM must be made by the factory. To
modify, disassemble, or alter the RPM on site is strictly prohibited. Do not
loosen any joints, with the exception of the housing cover for electrical
connection.
US
C
