EWT2A… Universal electronic control and monitoring device

For multi-line and sequential lubrication systems

The universal EWT2A series pulse monitors can be used in all standard SKF lubrication systems. The input pulse generated by the sequential metering valve sensor, pulse generator sensor, or gear train sensor must be within a pre-selected value range. Depending on the selected version, the minimum and maximum values can be monitored simultaneously for two or three input pulses. EWT2A pulse monitors are available in two supply voltages and can be installed in a control cabinet. All devices are equipped with built-in functions tailored to individual customer requirements and can be configured to meet system requirements.

Technical characteristics and advantages

  • Easy installation with U-shaped mounting rail
  • Adjustable operating modes
  • Monitoring time 6–90 seconds
  • Adjustable in the range from 0.01 to 2500 pulses/minute

Application areas

  • In combination with a pulse generator for oil and grease for reliable monitoring of lubricant consumption

Description

Technical specifications
Operating principle Universal electronic control and monitoring device
Operating temperature from 0 to +60 °C from +32 to +140 °F
Output voltage 24VDC: -15/+10 %
Dimensions 70 × 75 × 110 mm 2.7 x 3 x 4.3 inches
Version + 471
Input voltage 70 mA / 35 mA
Input power 8 W
Frequency 50–60 Hz
Fuse max 6.3 A
Switching current max 5 A
Output voltage sensors 24 VDC
Version + 472
Input voltage 20-24 VDC; 20-24 VAC
Nominal input current 75 mA with max. branching 250 mA
Input power 5 W
Frequency DC or 50–60 Hz
Fuse max 6.3 A
Switching current max 5 A
Output voltage sensors 24 VDC
Ordering information
Part number Description
EWT2A01-S1-E+471 for systems using up to 3 pulse generators, 115/230 VAC
EWT2A01-S1-E+472 for systems using up to 3 pulse generators, 24 VDC
EWT2A04-S1-E+471 for systems using up to 2 pulse generators, 115/230 VAC
EWT2A04-S1-E+472 for systems using up to 2 pulse generators, 24 VDC