961-20A0-010 Datasheet, PDF (22/36 Pages) Magnetrol International, Inc. – Ultrasonic Single and Dual Point Level Switches

3.0 Reference Information
3.1 Electronics Specifications
3.1.1 Model 961/962 with Relay Output
Supply Voltage
Relay Outputs
Relay Ratings
Fail-safe
Power Consumption
Ambient Temperature
961:
962:
DPDT:
SPDT:
961/962:
102 to 265 VAC, or 18 to 32 VDC
One DPDT level relay and one SPDT malfunction relay
Two SPDT level relays and one SPDT malfunction relay
5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.15 amp @ 125 VDC
5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.15 amp @ 125 VDC
Selectable for high or low level
Less than 3 watts
-40° to +160° F (-40° to +71° C)
3.1.2 Model 961/962 with Current Shift Output
Supply Voltage
Current Shift Output
Normal Operation:
Level Alarm Condition:
Malfunction:
Loop Resistance
Fail-safe
Power Consumption
961/962
Ambient Temperature
11 to 35 VDC
8 mA
16 mA
3.6 mA or 22 mA selectable
104 ohms with 11 VDC input, 1100 ohms with 35 VDC input
Selectable for high or low level
Less than 1 watt
-40° to +160° F (-40° to +71° C)
3.2 Performance Specifications
Repeatability
Response Time
Time Delay
Self-Test
Automatic:
Manual:
Shock Class
Vibration Class
Humidity
Electromagnetic Compatibility
±0.078" (2 mm)
1_{⁄2 second typical}
Variable 0.5 – 45 seconds on rising and falling levels
Continuously verifies operation of electronics, transducer,
piezoelectric crystals, and electrical noise
Push button verifies operation of electronics, transducer,
and piezoelectric crystals
ANSI/ISA-S71.03 Class SA1
ANSI/ISA-S71.03 Class VC2
0 – 99%, non-condensing
Meets CE requirements EN 61326
3.3 Physical Specifications
Housing Material
Cable Entry
Gross Weight
961/962 Electronics:
2" (5 cm) Transducer:
Cast aluminum A356-T6, or cast 316 stainless steel
3_{⁄4" NPT, or M20}
2.2 lbs. (1.0 kg)
0.6 lbs. (0.3 kg)
22
51-646 Echotel^® Model 961 & 962 Ultrasonic Level Switches