Toshiba LF494 - Manual (Page 147)

TOSHIBA
6.F8A0.7 7 4.
DO 1 und D02 functJons — One of die following fuiietiüiis eaii be nssigiied für DOl
(standard) und/or D
02
(option),
• Puhe output (available only for DOl)
Pulse rate: 3.6 to 3600000 pulses/hour
Pulse \vidth: 0.5 to 500 ms (but less than halt of the period of pulse output for
100
% flow rate)
• Multi-range selection outputs
One output used: (i) 2-range switching for unidirectional flow
(DOl or D02) (2) Torward/Reverse Ilow range switching
Two outputs used: (1) 4-range switching for unidirectional flow
(DOl and D02) (2) 2-range switching for Forward and Reverse flows
* High and/or low limit alarms outputs
Outputs an alarnrt signal if the process flow rale goes above or
belowi the SC! limits, Output status is programmable.
Setting range: -10 to 110% of the span (range)
Output Status: Normal Open or Normal Close selected
* Empty pipe ularm output
Outputs an alarm signal when the detector pipe is not filled whth
fluid.
Output status: Normal Open or Normal Close selected
* Preset point output
Outputs a signal w'hen the totalized flow reaches the preset value.
Setting range: 1 to counts
Output status: Contact ON (closed)
• Converter failure alarm
Outputs a signal if an error occurs w'hcn sclbdiagnostics is
conducted.
Output status; Normal Open or Normal Close selected
Communications output
a small digital signal is superimposed on 4-2U mA current signal
(conformed to
1
lARl’ protocol)
Load resistartce;
Load capacitance:
f^ad Inrluctance:
Cable length:
240 to 1
0.25 maximum
4ml I maximum
2kin maximum (approximate value when 1.25mm" shielded
cable is used under standard operating condition)
Note: HART (Highw'ay Addressable Remote Transducer) is a cominu meat ions
protocol for industrial sensors recommended by HCF
(HART Communication Foundation).
Damping: 0.5 to 60 seconds (selectable in increments of I second)
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