Yokogawa DR240 - Manual (Page 267)

14-22 IM DR232-01E
14.6 Specifications of Pulse Input Module
Model Code, Number of Input Channels, Terminal Configuration and Shortest
Measurement Interval
Model Code Number of Channels Terminal Configuration Shortest Measurement
Interval
DU600-11 10 Screw 0.5 s*
*: The interval between data updates is fixed to one second.
Method of Input
Potential with reference to the shared voltage of the COMMON line within the same module
Types of Input
Voltage-free contact or open collector (TTL or transistor)
Measurement Modes
RATE (instantaneous count mode): Outputs the prescaled value of the count of pulses imposed
over the last one-second interval of measurement.
GATE (instantaneous turn-on time mode): Outputs the prescaled values of the contact's turn-on
(make) and turn-off (break) times (on = 1; off = 0) over the last one-second interval of
measurement.
Note
The computing function (computational expression: TLOG.PSUM (XXX)) should be used when
integrating an every-second count or turn-on time (maximum count/turn-on time: 99999999).
Input Range
0 to 6,000 pulses, or 0 to 10 pulses (if the filter is on) for voltage-free input.
Ratio of make at input: 35 to 65% at the maximum frequency (ratio of make = closed-contact
time/(closed-contact time + open-contact time)
× 100)
Minimum input pulse width: 60 µs (whether the contact is closed or open)
Measuring Accuracies
As described below, under the following operating conditions:
Ambient temperature: 23
±2°C; ambient humidity: 55 ±10% RH; power supply voltage: 90 to 250
VAC (AC power supply)/10 to 32 VDC (the subunit of a DC power supply model only); power
supply frequency: 50/60Hz within
±1% (AC power supply); warm-up time 30 minutes or more;
vibrations and others not affecting instrument operation.
Count:
±1 pulse (for integration, ±(1 scan + 1 second) at the start of measurement and ±(1 scan +
1.5 seconds) at the end of measurement)
Turn-on time:
±100-ppm accuracy for judgment of one-second-interval sampling; for integration,
±(1 second + 1 scan) at the start of measurement and ±(100 ppm of rdg. + 1.5 seconds + 1 scan) at
the end of measurement
Module-to-module error:
±(3 seconds + 1 pulse) for count and ±(200 ppm + 3 seconds) for turn-
on time
Note
It takes a maximum of 2 seconds for normal measured values to be output when the power is turned on,
when the measurement mode is changed or when the setting for turning on/off the filter is changed. The
DR recorder indicates a value representative of “no data” ( on the display, or 8005H for the
binary format or a faulty data value for the ASCII format in the case of output to the communication line)
until the normal measured values are output.
Filter
Removes chatter of up to 5 ms (can be turned on or off on a channel basis).
Input Signal Levels
Open contact: 200
Ω maximum
Closed contact: 100 k
Ω minimum
Normal Operating Temperature/Humidity Range
0˚ to 50˚C
20 to 80% RH for an ambient temperature range of 0˚ to 40˚C or 10 to 50% RH for 40˚ to 50˚C
(non-condensing)
Normal Operating Magnetic-field Strength
400 A/m maximum