Loop Alarm™ Models SC1090 and SCL1090 INSTALLATION INSTRUCTIONS LOVE ® 949-0529 Rev. 2 LOVE CONTROLS 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.
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.
INPUT PROGRAMMING 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 ON SW4 for the range desired. 1 2 3 4 5 6 7 8 RANGE SELECTION CHART INPUT KEY 1 2 3 4 MODE 290-2887 VOLTAGE CURRENT UNIPOLAR BIPOLAR ZERO BASED ZERO +20% = ON ON SW1 = OFF BLANK = NOT APPLICABLE 1 2 3 4 ON SW4 1 2 3 4 5 6 7 8 RANGE 1 2 3 4 5 6 7 8 10mV/1mA 50mV/5mA 100mV/10mA 200mV/20mA 0.
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.
Using the figure below, set up the switches on SW2 for Alarm A and Alarm B. For dual alarm relays triggered by Alarm A, set switch 5 to DUAL. When switch 5 is set to DUAL (on), switches 6 and 7 have no effect. OUTPUT MODE MODE 1 2 3 4 LO HI ALARM A DIR REV NON LATCHING LATCHING SW2 5 6 7 8 DUAL SINGLE LO HI ALARM B DIR REV ON ON 1 2 3 4 5 6 7 8 ON WIRING 1 2 3 4 Mount on DIN rail and wire per diagram. INPUT RTD ON + T/C,V & I 1 2 3 4 5 6 7 8 MADE IN U.S.A. LOVE CONTROLS DIV.
ALARM CALIBRATION 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 alarm AL screw for relay trip (LED changes color). 3. Adjust the alarm DB screw to the full clockwise position. Change the input to the desired reset point.
SPECIFICATIONS 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 Temperature 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.
NOTES December, 2004 Page 8 of 8 949-0529 Rev.
