Loop Alarm™
Models SC1090 and SCL1090
INSTALLATION INSTRUCTIONS
LOVE CONTROLS
LOVE
®
949-0529 Rev. 2 Page 1 of 8 December, 2004
a Division of Dwyer Instruments, Incorporated
PO Box 338 Michigan City, IN 46361-0338
(800) 828-4588 (219) 879-8000 FAX (219) 872-9057
❍
❍
www.love-controls.com
❍
Getting Started
1.) Using a small screwdriver , ball point pen, etc. set the Input Mode Switch
(SW-1) on the side of the unit for the type of input to be used. Set the
Input Range Switch (SW-4 for the input range desired (see Input Programming on page 3).
2.) Set the Output Switch (SW-2) for the output responses required (see
Output Programming on page 4).
3.) Mount unit into panel. (see Mounting on page 5).
4.) Connect unit to input signal, output signal, and power wiring (see Wiring on page 5).
5.) Check calibration (See Calibration on page 6).
Operation description is on page 6
Specifications are on page 7.
Copyright © 2004 Love Controls Division, Dwyer Instruments, Inc. All rights reserved.
December, 2004 Page 2 of 8 949-0529 Rev. 2
INPUT PROGRAMMING
12345678
ON
Use the following chart to select the input type and range for your process.
Turn on the appropriate switch(s) (as indicated) on SW1 for the input and
SW4 for the range desired.
RANGE SELECTION CHART
VOLTAGE
CURRENT
UNIPOLAR
BIPOLAR
ZERO BASED
ZERO +20%
290-2887
MODE
1234
RANGE
10mV/1mA
50mV/5mA
100mV/10mA
200mV/20mA
0.5V/50mA
1V/100mA
5V
10V
INPUT
ON
1 2 3 4
ON
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
SW1
SW4
KEY
=ON
= OFF
BLANK =
NOT
APPLICABLE
POPULAR INPUT RANGE SETUPS
For all of the settings below, all switches are assumed to be off unless
noted.
4 to 20 mA:
On switch SW-1 tur n on switches 1, 2, and 4. On switch SW-4 turn on
switch 4.
10 to 50 mA:
On switch SW-1 tur n on switches 1, 2, and 4. On switch SW-4 tur n on
switch 5.
0 to 20 mA:
On switch SW-1 turn on switches 1 and 2. On switch SW-4 turn on switch
4.
0 to 10 V:
On switch SW-1 turn on switch 2. On switch SW-4 turn on switch 8.
-10 to +10 mV:
On switch SW-1 turn on switch 3. On switch SW-4 turn on switch 1.
949-0529 Rev. 2 Page 3 of 8 December, 2004
OUTPUT PROGRAMMING
Setup of the alarms is fairly simple once a few concepts are understood. Since the alarms can be set for reverse or direct action,
high or low function, and has normally open and normally closed
contacts; the number of combinations of actual output behavior is
quite large.
First, decide how you want the outputs to behave. Will the relay
energize or de-energize at the trip point? Will the relay trip on an
increasing or decreasing signal? Is the dead band above or below
the trip point?
It is important to answer these questions before setting up the module. The following Function Chart illustrates the most likely combinations of settings.
FUNCTION CHART
December, 2004 Page 4 of 8 949-0529 Rev. 2
ON
Using the figure below, set up the switches on SW2 for Alarm A and
Alarm B.
switch 5 to
For dual alarm relays triggered by Alarm A, set
DUAL. When switch 5 is set to DUAL (on),
switches 6 and 7 have no effect.
OUTPUT
MODE
LO
HI
ALARM A
DIR
REV
NON LATCHING
LATCHING
1234
SW2
ON
1 2 3 4 5 6 7 8
MODE
ALARM B
DUAL
SINGLE
LO
HI
DIR
REV
5678
WIRING
Mount on DIN rail and wire per diagram.
290-2888
INPUT
RTD
+
T/C,V
&I
2
1
3
4
MADE IN U.S.A.
LOVE CONTROLS
MICHIGAN CITY, IN 46361, U.S.A.
DIV. OF DWYER INSTRUMENTS, INC.
TM
MODEL:
S/N:
N.C.
N.C.
7
10
POWER
5
COM
ALARMA
ALARMB
COM
8
11
6
N.O.
N.O.
9
12
For SC1090, power is 85 to 265 Vdc/Vac 50 to 400 Hz.
For SCL1090 power is 12 to 24 Vdc/Vac 50 to 400 Hz. ±20%.
W ARNING: Do not attempt to operate this device with the cover removed. Potentially lethal voltage is present on some of the internal
components. Do not open the unit. There are
no internal adjustments or user serviceable
parts in the unit.
949-0529 Rev. 2 Page 5 of 8 December, 2004
ALARM CALIBRATION
12345678
ON
1234
ON
12345678
ON
NOTE: Allow the module and socket to come to stable
temperature before proceeding. For best results, allow
the module to be powered in the socket for at least 20
minutes.
1. Apply the appropriate input for the desired
alarm trip point.
2. Adjust the alar m AL screw for relay trip (LED
changes color).
3. Adjust the alarm DB screw to the full clock-
wise position. Change the input to the desired
reset point. Slowly turn the alarm DB screw
counter-clockwise until the relay resets (Alarm
LED changes back to original color).
4. Move the input back to the desired trip point to
confirm correct setting.
5. Move the input to the reset point to confirm
correct setting.
6. Repeat as necessary.
AL
B
RESET
A
DB
OPERATION
On power up the module will automatically reset the alarms provided
that no alarm condition exists. It may be necessary to reset a low
alarm after the process has reached normal conditions.
When the input is within set limits, both LED indicators will be green
and the relay contacts will be in the state programmed for nor mal operation. If the input reaches either of the trip points, the relay connected to that trip point will change state and the LED connected to
that point will indicate red.
When the input returns to normal (tr ip point plus dead band for low
alarm settings, trip point less dead band for high alarm settings) and
switch 4 of SW 2 is set to NON-LATCHING, the relay and LED will
automatically return to the non-alarm condition. If switch 4 of SW 2 is
set to latching, the red RESET button on the top of the module must be
pressed to return the relay and LED to the non-alarm condition.
December, 2004 Page 6 of 8 949-0529 Rev. 2
SPECIFICATIONS
ON
ON
ON
Power Supply:
SC1090: 85 to 265 Vdc/Vac 50 to 400 Hz.
SCL1090: 12 to 24 Vdc/Vac 50 to 400 Hz. ±20%
Isolation: 1500 V rms between outputs, input, and power.
Set Points: Adjustable 0 to 100% of span.
Deadband: Adjustable 0.25% to 100% of span.
Drift: ±0.02% / °C typical, ±0.05% / °C maximum.
Ambient T emperature Range:
Operating: 0° to 55° C (32° to 131° F)
Storage: -40° to +80°C (-40° to +176°F)
Humidity Conditions: 0 to 90% up to 40 °C non-condensing, 10 to 50%
at 55 °C non-condensing.
Input impedance:
Voltage input: 1 megohm.
Current input: 10 ohms.
Relay output: SPDT, one per set point, 5A @ 250 VAC, resistive.
Latch circuit reset: Automatic at power up. Manual with reset
switch on front of module.
Indicators: One dual color LED per set point. Red = relay on,
green = relay off.
DIMENSIONS
22.5
(0.886)
290-2887
10mV/1mA
50mV/5mA
100mV/10mA
200mV/20mA
0.5V/50mA
1V/100mA
5V
10V
RANGE
1 2 3 4 5 6 7 8
12345678
SW4
AL
B
75
RESET
A
(2.950)
DB
UNIPOLAR
BIPOLAR
ZERO BASED
ZERO +20%
ON
1 2 3 4
SW1
BLANK =
NOT
APPLICABLE
= OFF
98.5
(3.880)
9
12
8
All dimensions in
millimeters (inches)
11
7
10
949-0529 Rev. 2 Page 7 of 8 December, 2004
VOLTAGE
CURRENT
ON
=ON
MODE
1234
INPUT
KEY
DIN EN 50022-35
(not supplied)
ALARM A
NON LATCHING
LATCHING
MODE
REV
DIR
LO
HI
1234
ON
1 2 3 4 5 6 7 8
OUTPUT
SW2
ALARM B
MODE
SINGLE
DUAL
REV
DIR
LO
HI
5678
35.5
(1.40)
ADAPTER BRACKET
FOR SURFACE MOUNTING
(OPTIONAL)
KIT#: 1007-35DINADPTR
NOTES
December, 2004 Page 8 of 8 949-0529 Rev. 2
Loading...