Toshiba Tohsiba Electromagnetic Flowmeter Converter L5232 - Manual (Page 168)

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• Range switching output One Digital Output (DO) is used
• Single direction, 2-range switching signal
• Forward/reverse direction switching signal
Two Digital Outputs (DO) are used
• Single direction, 4-range switching signals
• Forward/reverse 2-range switching signals
• High/low limit alarm output
An alarm is output when flow rate goes above or below the
set-point value
Setting range
−10 to 110% of the settable maximum range
High limit 2 points, low limit 2 points can be set
At the time of alarm output, Normally Open or Normally Closed
contact can be selected
• Preset counter output
Contact ON when totalizer count exceeds the set value
Setting range 1 to 99999999 count
• Converter error alarm
An alarm is output when an operation error is detected by
self-diagnosis.
At the time of alarm output, Normally Open or Normally Closed
contact can be selected
• Digital Input (option: added when 9th digit of specification code is “3”): 2 Digital Inputs
Signal type: Voltage signal of 20 to 30 VDC (H level: 20 to 30 VDC, L level: 2 VDC :
or less)
Input resistance: About 2.7 k Ω
* For digital input function, either of the following functions can be selected.
Digital Input function
• Range switching input One Digital Input is used: switching between large and small ranges
of forward/reverse, 2-range measurement
Two Digital Inputs are used: switching between ranges of single
direction, 4-range measurement
• Totalizer control input Totalizer Start/Stop control or Reset/Start
• Output hold input Fixed with set value for current output and pulse output (loop check)
• Zero adjustment input Performs still water zero adjustment
4. Communication function
• Communication signal: Digital signal is superimposed on 4 to 20mA signal line (conforms to
HART *1 protocol)
• Load resistance 240 Ω to 1kΩ
• Load capacitance 0.25μF or less
• Load inductance 4mH or less
(For maximum cable length, about 2km is a guideline length when CVV-S 1.25mm 2 is used
under standard installation condition.)
*1 HART: “HART” stands for Highway Addressable Remote Transducer and is the name of the
communication protocol for industry sensors that is recommended by HCF (HART
Communication Foundation).