Deltabar FMD71, FMD72
16 Endress+Hauser
Jumper position for test
signal
Description
A0019992
• Measurement of 4 to 20 mA test signal via the positive and test terminal:
possible. (Thus, the output current can be measured without interruption via
the diode.)
• Delivery status
• Minimum supply voltage: 13 V DC
A0019993
• Measurement of 4 to 20 mA test signal via positive and test terminal: not
possible.
• Minimum supply voltage: 12 V DC
Cable entries
Explosion protection Cable gland Permitted cable diameter Permitted wire cross-sections
• Standard
• Ex ia
• Ex ic
Plastic M20x1.5 5 to 10 mm (0.2 to 0.39 in) 0.5 to 2.5 mm
2
(20 to 14 AWG)
• Ex tD
• Ex nA
• FM approval
• CSA approval
Metal M20 x 1.5 7 to 10.5 mm (0.28 to 0.41 in)
Cable specification for
transmitter connection
• Endress+Hauser recommends using twisted, shielded two-wire cables.
• Terminals for core cross-sections 0.5 to 2.5 mm
2
(20 to 14 AWG)
• The cable outer diameter depends on the cable entry used.
Residual ripple
Without influence on 4 to 20 mA signal up to ±5 % residual ripple within the permitted voltage
range [according to HART hardware specification HCF_SPEC-54 (DIN IEC 60381-1)]
Influence of power supply
≤0.0006 % of URL/1 V
Overvoltage protection Standard version
The standard version of the pressure instruments does not contain any special elements to protect
against overvoltage ("wire to ground"). Nevertheless the requirements of the applicable EMC
standard EN 61000-4-5 (testing voltage 1kV EMC wire/ground) are met.
Optional overvoltage protection
Devices showing version "NA" in feature 610 "Accessory Mounted" in the order code are equipped
with overvoltage protection.
• Overvoltage protection:
– Nominal functioning DC voltage: 600 V
– Nominal discharge current: 10 kA
• Surge current check î = 20 kA satisfied as per DIN EN 60079-14: 8/20 μs
• Arrester AC current check I = 10 A satisfied
NOTICE
Device could be destroyed!
‣
Devices with integrated overvoltage protection must be grounded.
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