• Display Calibrated in Engineering Units (°F,°C,%,PSI, etc.) Proportional to DC Input
• Mount, Wire and Calibrate from Front
• Fully Isolated Output and/or 0, 1, or 2 Alarms
• Alarm Setpoints Adjustable without Disturbing Transmitter Output
• Fail-Safe Alarm Operation
• LED Alarm Status Indicator
• Adjustable Deadband
• 24 VDC Power Supply for Two-Wire Transmitters
• 4/20 mA Input Range
• Fits Standard 1/8 DIN Cutout
• Rated NEMA-4, Splashproof when Properly Installed
• 5 Year Warranty

The DIS971-24 provides a display, optional isolated DC output voltage or current proportional to a DC input signal, and optional alarm setpoints. All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptibility to electrical noise and damage by lightning. The digital display utilizes an auto-zero dualslope integrating A/D converter for accuracy and stability. The instrument contains a 24 VDC transmitter power supply specifically designed for use with two-wire and other 24 VDC powered transmitters.

All controls are accessible by removing the gasketed front access panel. The display controls are wide-ranging so that they can be calibrated to display engineering units. Decimal point selection is made with a switch, also accessible from the front.

A complete set of engineering unit labels is sent with each DIS. Once the display has been adjusted to read the correct engineering units, the alarm setpoints can be adjusted without test
equipment and without disturbing the output voltage or current.

Either setpoint may be displayed by use of the SP CAL switch. Each setpoint has an LED to indicate alarm status. The alarms have adjustable deadbands. Terminations are made to a screw terminal connector on the rear of the case.

TYPICAL APPLICATIONS
DC process indication, control, monitoring, isolation, DC monitor/ current limit, two-wire excitation.

INPUT RANGE 4/20 mA INPUT IMPEDANCE 61.9 ohms TRANSMITTER POWER SUPPLY 24 VDC regulated, 30 mA max OPTIONS SA, DA SETPOINT each alarm 0 to 100% of span DEADBAND 0.25% to 100% of span RELAY CONTACTS (spdt) Resistive Load 5 A max, 150 W max 240 VAC max 30 VDC max Inductive Load 1/8 HP max at 120/240 VAC OPTION TX OUTPUT RANGE Voltage select any range between ±10 V,10 mA max load (min span 0.2 V) Current select any range from 0 to 20 mA max >24V compliance (1200 ohms max at 20 mA) (min span 1 mA) OUTPUT RIPPLE (Peak-to-Peak) <0.1% of span ISOLATION Output / Input >500 megohms Breakdown Voltage >600 VAC rms

RESPONSE TIME (Range Dependent) < 100 ms ACCURACY ±0.1% of span LINEARITY Display ±0.01% of span Output ±0.025% of span COMMON MODE REJECTION 120 dB, DC to 60 Hz DISPLAY Digit Size .56" LED, 4½ digits, ±19999 Decimal Point ±1.9.9.9.9 Control Range Zero ±19999 Span min span 100/max span 20000 DISPLAY Update 3/sec OPERATING TEMPERATURE 14°F to 140°F/-10°C to 60°C TEMPERATURE STABILITY ±0.02% of span/°C max POWER 115 VAC ±10%, 50 or 60 Hz (4 W max) 230 VAC ±10%, 50 or 60 Hz (4 W max)

Terminal 1 Terminal 2 Terminal 3 Terminal 4 Terminal 5 Terminal 6 Terminal 7 Terminal 8 Terminal 9 Terminal 10 Terminal 11 Terminal 12 Terminal 13 Terminal 14

Output - Output + 24 VDC + 24 VDC - Input + Input - Alarm 1 NC Alarm 1 C Alarm 1 NO Alarm 2 NC Alarm 2 C Alarm 2 NO Power AC L1 Power AC L2