FR1000 - Wilkerson Instrument Co., Inc.

FR1000 - Wilkerson Instrument Co., Inc.
FIGURE 1
B. Negative Inputs
1. Determine SPAN
(Ex: 0 to -10 V)
FR1000
DC INPUT
FIELD RANGEABLE
SINGLE ALARM
Span = f.s - low scale
Span = -10 - 0 = 10 V
2. Place the INPUT SPAN jumper at the
next highest position (16 V).
3. To calculate the OFFSET jumper
position divide the input f.s by the
SPAN jumper position (10/16 = 62.5%).
Place the jumper in the position
nearest the desired offset.
4. To cancel a suppressed input, place
the ELV/SUP jumper in the SUP
position.
DESCRIPTION
The FR1000 monitors a DC input signal and
provides one set of DPDT alarm relay contacts
with an adjustable trip setpoint. The setpoint
has a set of red/green LEDs to indicate alarm
status. The configuration of the alarm relay
is user-settable as; a high or low alarm;
normal or reverse acting relay; adjustable
deadband; a latching alarm.
SETTING THE ALARM
SETPOINT AND DEADBAND
up and down to check the levels at which the
relay trips and resets. The setpoint will
remain centered in the middle of the
deadband. With deadband set at the desired
amount of hysteresis, the SETPOINT control
can be used to move the deadband window
up or down as desired.
RECONFIGURING THE INPUT
RANGE AND ALARM
CONFIGURATIONS
The product is configured as indicated on the
label on the product case. Check that all
range select and alarm configuration jumpers
are properly set for the desired operation.
Refer to Block Diagram and Pin Connections
for connections.
Unplug the module and unscrew the four
screws at the corner of the base to
remove the cover.
Connect a precision DC voltage or current
source to the input.
FIGURE 1 illustrates the input range select
and alarm configuration jumper positions.
The top of the case also indicates jumper
positions.
(NOTE: When calibrating a latching
alarm, do the setup as a standard alarm
(DB) and move the jumper to the LATCH
position when setup is complete.)
SETPOINT
To calibrate the alarm setpoint, set the input
signal to the alarm value. Turn the DEADBAND
control fully ccw to reduce its influence to a
minimum. Adjust the alarm SETPOINT control
until its LED just turns red (ccw lowers the
setpoint, cw raises it).
Adjust the DEADBAND control for the desired
amount of deadband. Vary the input signal
1
CAUTION: FOR SAFETY, DO NOT APPLY
POWER WHILE COVER IS REMOVED.
A. Positive inputs
1. Place the INPUT jumper in its upper (MA)
position for DC current inputs or its
lower (V) position for DC voltage inputs.
2. Span is the difference between full
scale signal and low scale signal. Place
the INPUT SPAN jumper at the next
position above the desired span. The
labeled values represent the maximum
achievable span for each position. For
example, the position marked 2 Volts
allows the SETPOINT to be adjusted
from 0 to 2 volts.
Remember: SPAN is the difference
between full-scale and the low end.
For example, a -10/+10 V input range
has a span of 20 volts, 4/20 mA has a
span of 16 mA.
C. Place the alarm configuration jumper in
the position that will provide the desired
alarm action (refer to the following
descriptions).
1. HI/LO jumper
HI selects alarm on an increasing
signal. LO selects alarm on a
decreasing signal.
3. The INPUT CANCEL OFFSET % SPAN
jumper positions are labeled as percent
of maximum span. ELV offset cancels
input offsets that are elevated (+) above
0. SUP cancels input offsets that are
suppressed
(-) below 0. For example, for a range of
+5/+10 V (span = 5 V), the 8 volt span
position will be used. The 5 volt input
offset is 62.5% of the 8 volt maximum
span and is elevated. (5/8 = 62.5%)
Place the jumper in the position nearest
the desired offset. In the above example
either the 50% or the 75% positions
could be used.
2. NORM/REV
NORM has the relay energized for
normal conditions and de-energized
for an alarm condition. This provides
fail safe operation since power failure
will put the relay in the alarm condition.
REV has the relay in the opposite
condition. It will be de-energized for
normal conditions and will energize
for an alarm condition.
4. Place the ELV/SUP jumper in the ELV
(elevated) position for positive input
offsets, SUP (suppressed) for negative
offsets. In the above example, ELV
would be used.
LATCH mode allows the alarm to trip
at the set point level, but it will not
recover. To reset the alarm a contact
closure must momentarily connect
the reset pins together.
3. DB/LATCH
DB jumper allows the alarm to trip at
the set point level and recover at a
level determined by the amount of
deadband set into the DB control.
The alarm can not be reset until the
input signal has been reduced below
the alarm value.
2
DEADBAND JUMPER POSITIONS
HI
HI
NORM
NORM
LO
LO
REV
DB
LATCH
REV
DB
LATCH
0.1% to 25%
of SPAN
25% to 100%
of SPAN
D. Replace the cover, positioned so that the
holes in the top are aligned with the SP
and DB controls.
SPECIFICATIONS
MOUNTING
WARRANTY
INPUT LIMITS
any voltage between -256 and +256
VDC
any current between -100 and +100
mAdc
The module is designed to plug into a
standard 11 pin relay socket. (MP011) is a
molded plastic socket that can be mounted
on a flat surface or snapped into a 2¾ inch
wide PVC track (TRK48). (DMP011) is a DIN
rail (35mm) mounted socket.
A hold-down clip (CLP-1) is available for
installations where vibration may be a
problem.
The Field Rangeable Series of products carry
a limited permanent warranty. In the event of
a failure due to defective material or
workmanship, the unit will be repaired or
replaced at no charge. Relays are not covered
by the warranty.
FULL SCALE RANGES
31 mV to 256 VDC in 14 steps
1.6 mA to 100 mAdc in 7 steps
OFFSET
can cancel any input offset between
-110% and +110% of span
E. Apply power and calibrate SETPOINT
and DB per instructions above.
INPUT IMPEDANCE
Voltage
1 megohm
Current
20 ohms
RELAY CONTACT PROTECTION
SETPOINT
0 to 100% of span
When inductive loads such as motors, relays
or transformers are switched, voltage
transients may be generated which exceed
the ratings of the relay contacts. The resulting
arcing can quickly destroy the contacts.
Surge suppression is required across
inductive loads to guard against premature
relay failure. FIGURE 2 illustrates diode
surge suppression for a DC load. The diodes
operating (peak inverse) voltage should
exceed the loads supply voltage by at least
50% and should have a current rating of at
least one ampere.
FIGURE 3 shows surge suppression for an
AC load, using an MOV (Metal Oxide Varistor)
and a capacitor.
The breakdown voltage ratings of both the
MOV and the capacitor must exceed the
peak AC voltage.
With normal sine-wave power, PEAK =
1.414 x RMS voltage. For 115 VAC power,
a 200 volt peak rating is recommended.
CASE DIMENSIONS
INCHES [mm]
DEADBAND
0.1% to 100% of span
LATCHING ALARM
Reset by remote contact closure or by
momentary power interruption
RESPONSE TIME
20 ms typical
ACCURACY
0.1% of span
COMMON MODE REJECTION
120 dB, DC to 60 Hz
RELAY CONTACTS
DPDT, 5 A contacts
OPERATING TEMPERATURE
14°F to 140°F/-10°C to 60°C
TEMPERATURE STABILITY
(0.02% of span +30 µV)/C max
POWER
(2.5 W max)
115 VAC ±10%, 50 or 60 Hz
230 VAC ±10%, 50 or 60 Hz
24 VAC ±10%, 50 or 60 Hz
(DC Power Option)
12 VDC (limits 10 VDC to 15 VDC)
24 VDC (limits 21 VDC to 32 VDC)
Specifications are subject to change without notice. © 2007 Wilkerson Instrument Co., Inc.
DWG#W102518C 3/07
Isolation, DC power supply to input
common: 100 megohms
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