VAC D500, Руководство пользователя

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26
… 7 Installation
… Electrical connections
Set point signal analog (two-wire technology)
Terminals +11 / Æ 12
Nominal operating range 4 to 20 mA
Limit values Maximum: 50 mA (overload)
Minimum: 3.6 mA
Starting at t 3.8 mA
Load voltage 9.7 V at 20 mA
Impedance 485 έ at 20 mA
Digital input DI
Terminals +81 / Æ 82
Supply voltage 24 V DC (12 to 30 V DC)
Input ‘logical 0’ 0 to 5 V DC
Input ‘logical 1’ 11 to 30 V DC
Input Current Maximum 4 mA
Digital output DO
Terminals +83 / Æ 84
Supply voltage 5 to 30 V DC
(Control circuit to DIN 19234/NAMUR)
Switching state logical ‘0’: current > 0.35 mA to < 1.2 mA
‘1’: Current > 2,1 mA
Direction of action standard logical ‘0’ or logical ‘1’
(configurable)
Option modules
Module for analog feedback AO*
Without any signal from the positioner (e.g. ‘no power’ or
‘initializing’) the module sets the output to > 20 mA (alarm level).
Terminals +31 / Æ 32
Signal range 4 to 20 mA (split ranges can be parameterized)
Supply voltage, two-wire
technology 24 V DC (10 to 30 V DC)
Characteristic curve rising or falling (configurable)
Deviation < 1 %
Module for digital feedback SW1, SW2*
Two switches for binary position feedback (position adjustable
within the range of 0 to 100 %, ranges cannot overlap)
Terminals +41 / Æ 42, +51 / Æ 52
Supply voltage 5 to 11 V DC
(Control circuit to DIN 19234/NAMUR)
Signal current < 1,2 mA: Switching state logical ‘0’
> 2,1 mA: Switching state logical ‘1’
Direction of action standard logical ‘0’ or logical ‘1’ (configurable)
Module for universal input UAI*
Module for a 4 to 20 mA input for universal use.
The range can be scaled. It is used for advanced valve
diagnostics. For example, an ultrasonic sensor can be connected
to detect a faulty valve seat or a phonometer can be connected
to detect cavitation.
The limit values for detecting up-scaling can be freely selected.
Terminals +21 / Æ 22
Nominal operating range 4 to 20 mA
Load voltage 8 V at 20 mA
Impedance 400 έ at 20 mA