Relays
Version
optional three or five independent relays each with one
potential-free change-contact
always three relays only with RS-485 interface
Functions
– limit value
– alarm relay
– trend
– time pulses (FMU 861 and FMU 862 only)
– max. counting frequency 2 Hz, pulse width 200 ms
– time pulses (FMU 861 only)
– back-up (FMU 862 only)
Switching power
4 A, 250 V, 100 VA at cos
ϕ
= 0.7,
3.5 V DC and 100 W
Accuracy
Measured error
(sum of linearity, hysteresis and reproducibility)
typical 0.2 % for maximum measurement span with smooth
surface
Max. resolution
1 mm for FDU 80
Effect of load
Negligible within permissible range
Process Conditions
Ambient conditions
Ambient temperature
–20…+60 °C
Storage temperature
–40…+80 °C
Shock resistance
2 g (10…55 Hz) and 15 g for 11 ms (DIN 40040, Typ W)
Climatic class
DIN 40040 Type R
Relative air humidity 95 % in yearly average, condensation
permissible
Ingress protection
DIN 40050
– Field housing: IP 66 with closed housing and Pg identical
protection
– IP 40: plastic housing with Pg identical protection
– IP 10: plate for mounting in control cabinet
– IP 10: separate operating unit (keyboard and display)
Electromagnetic compatibility
– AC power supply:
interference emission to EN 50081-1 interference
resistance to EN 50082-2 and NAMUR industry standard,
with 10 V/m
– DC power supply:
interference emission to EN 50081-2 interference
resistance to EN 50082-2 and NAMUR industry standard,
with 10 V/m
Mechanical Construction
Materials
IP 66 field housing
– Housing body: PC/ABS
– Transparent cover: PC (polycarbonate)
– Front plate with tag area
– Weight: 2.6 kg
IP 40 plastic housing
– PC/ABS
– Weight: 1.0 kg
IP 10 mounting plate
– Al/PS
– Weight: 0.8 kg
Separate operating unit
– PC/ABS
– Weight: 0.3 kg
Accessories
Protective cover for field housing
– Materials: Aluminium blue lacquered or SS 304 (1.4301)
– Weight: approx. 1.0 kg
– Mounting screws supplied
Post mounting
– Materials: galvanised steel or SS 304 (1.4301)
– Weight: approx. 1,0 kg
– Mounting screws and nuts supplied
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