Tabla de contenido
Instructions
Measurement evaluation unit type UM-... Ex
I
Range of application
The measurement evaluation unit type UM-... Ex can serve as part of an overfilling prevention system.
II
Standards
See EC-type examination certificate including supplements.
III
Instructions for safe ...
III.a
... use
The measurement evaluation unit serves as associated equipment and is not approved for use inside
potentially explosive atmospheres. The intrinsically safe sensor circuit of the measurement evaluation
unit can be lead in zone 0 and is suitable for all gas groups (IIA, IIB and IIC).
The approval is valid only for the versions of the device
UM-Ex
UM-O Ex
III.b ... assembling and dismantling
The measurement evaluation unit is suitable for wall mounting. The evaluation unit must be installed
outside potentially explosive atmospheres.
III.c
... installation
Wiring work may only be performed with the power disconnected. The special EN regulations includ-
ing EN 60079-14 and local installation regulations must be observed.
The wiring from the sensor (for example TORRIX Ex ...) to the measurement evaluation unit (preferably
blue coloured cable) may not exceed the permissible inductance and capacitance according to sec-
tion V.
Terminal designation:
Power supply circuit:
Acknowledge circuit:
Outputs:
Sensor circuit:
III.d ... putting into service
Before putting into service, all devices must be checked to ensure they are properly connected and
installed. The power supply, also of connected equipment, must be checked.
III.e
... maintenance (servicing and emergency repair)
In general, the measurement evaluation unit is maintenance-free. In case of a defect it must be send
back to FAFNIR or one of its representations.
Page 1/2
FAFNIR GmbH
Bahrenfelder Str. 19
L, N and PE (22, 21 and 20)
Ack. (19 and 18)
Relay 5 (17, 16 and 15)
Relay 4 (14, 13 and 12)
Relay 3 (11, 10 and 9)
Relay 2 (8, 7 and 6)
Relay 1 (5, 4 and 3)
- + Probe 4..20 mA (2 and 1)
22765 Hamburg
Telefon: +49 / (0) 40 / 39 82 07-0
TÜV 07 ATEX 345770
Edition: 11.2011
Fax: +49 / (0) 40 / 390 63 39
Tabla de contenido
