EXPLANATIONS OF TERMS & FUNCTIONS
■
LOW-END CUTOUT
The transmitter outputs a DC voltage/current signal equiv-
alent to 0 Hz when a frequency lower than the low-end cut-
out setpoint. It is selectable with the Programming Unit for
the range from -15 to +115% of the input range.
For example, suppose the input zero and span frequencies
are set respectively to 0 Hz and 10 kHz, the low-end cutout
to 10% (= 1 kHz) , and the low-end cutout deadband to 1%.
The transmitter outputs the value equivalent to 0 Hz while
the input is within 0 and 1 kHz. When the input reaches
over 11% (= 1.1 kHz), the low-end cutout is reset and the
transmitter outputs proportionally to the input.
■
ALARM OUTPUT
Either Hi or Lo alarm output is supplied by a relay contact.
The alarm setpoint and the deadband (hysteresis) are ad-
justable with the Programming Unit in percentage of the
input range. The alarm setpoint is selectable from -15 to
+115%, while the deadband is from 0 to 20%.
Once the relay contact trips, it is reset to the normal po-
sition when the input signal goes back past the deadband
setting.
With Hi alarm, the relay is turned on when the input goes
above the setpoint, and returns to off when the input goes
below the setpoint and down past the deadband setting.
With Lo alarm, the relay is turned on when the input goes
below the setpoint, and returns to off when the input goes
above the setpoint and up past the deadband setting.
When the output linearization is used, signals before the
output linearization process is used to compare with the
setpoints.
■
DETECTING PULSE EDGE
• Open Collector & Mechanical Contact
OFF (input monitor LED ON) to ON
(input monitor LED OFF)
• Voltage Pulse
A pulse rise detected when the input voltage goes above
the detecting level (input monitor LED ON); a pulse sink
detected when it goes below the level (input monitor LED
OFF).
• Two-Wire Current Pulse
The input resistor (100Ω) converts the current signal (0 –
25mA) into 0 – 2.5V. A pulse rise detected when the volt-
age goes above the detecting level (input monitor LED ON);
a pulse sink detected when it goes below the level (input
monitor LED OFF).
HARDWARE SETTING & CALIBRATION
■
FRONT PANEL CONFIGURATION
5
4
3
2
1
0
9
8
7
6
1
2
3
4
5
6
ON
Span Adj.
Detecting Level Adj.
Detecting Level Adj. Pin
Pulse Amplitude Selector
Input Type Selector
Zero Adj.
Sensor Excitation Adj.
Modular Jack
Input Monitor LED PL1
■
PULSE AMPLITUDE (rotary switch)
(*) Factory setting
For voltage pulse input, select the pulse amplitude (V p-p)
among the switch positions 0 through 6. For open collector,
mechanical contact or two-wire current pulse input, set the
switch to 7. DO NOT SET to 8 or 9. The power supply to the
unit must be turned off when changing the setting.
SW
PULSE AMPLITUDE
MAX. INPUT VOLTAGE
0
50 – 100V p-p
50V
1
25 – 50V p-p
50V
2
10 – 25V p-p
25V
3
5 – 10V p-p
10V
4
1 – 5V p-p
5V
5*
1
0.5 – 1V p-p
1V
6*
1
0.1 – 0.5V p-p
0.5V
7(*)
Open collector, mechanical contact or two-wire current
pulse
*1. Maximum frequency limited to 50 kHz.
■
DETECTING LEVEL
A specific sensitivity scale is applied according to the pulse
amplitude setting. The scaled input voltage is then com-
pared to the preset detecting level.
With DC coupling, the scaled H level voltage must be higher
than the detecting level so that the pulse state is accurately
detected (Refer to the instruction manual for detailed infor-
mation about adjusting the detecting level).
SW
PULSE AMPLITUDE
SENSITIVITY SCALE
0
1
2
3
50 – 100V p-p
25 – 50V p-p
10 – 25V p-p
5 – 10V p-p
1/20
1/10
1/5
1/2
4
5
6
1 – 5V p-p
0.5 – 1V p-p
0.1 – 0.5V p-p
1
5
10
7
Open collector
Mechanical contact
Two-wire current pulse
1
JPA2
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-1572 Rev.5 P. 3 / 9
