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Safety
Diagnostics (Includes
fault alarm)
Outputs
• galvanically isolated
• damping
Current loop
• continuous signal
• 2-state functionality
• time delay
• adjustable hysteresis (on / off) 0 to 100%, min. 1% of range
Solid-state switch
• time delay
• adjustable hysteresis (on / off)
• max switching voltage
• max. load current
User Interface
Local digital display
Rotary function switch
• 16 Positions
Push-buttons: RED (+), BLUE (–)
Communications
1
HART
Communication protocol
1.
HART® is a registered trademark of the HART Communications Foundation.
Page 6
SITRANS LC500 – OPERATING INSTRUCTIONS
• current signalling according to NAMUR NE 43;
3.6 to 22 mA / 22 to 3.6 mA
• probe input ESD protected to 55 kV
• inputs/outputs fully galvanically isolated
• polarity-insensitive current loop
• fully potted
• integrated safety barrier
• primary variable (PV) out of limits
• system failure measurement circuit
• deviation between A/D and D/A converter
values
• check sum
• watch dog
• self-checking facility
range 1 to 10,000
4 to 20 mA / 20 to 4 mA
4 or 20 mA / 20 or 4 mA, on or off
1 to 100 sec. activating / de-activating
1 to 100 sec. activating / de-activating
0 to 100%, min. 1% of range
30 V DC/30 V peak AC
82 mA
4 1/2 digit LCD
for selecting programmable menu items
0 to 9, A to F
used in conjunction with rotary switch, for
programming menu items
7ML19985GE04
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