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What are some major differences between M-flex, E-flex, S-Flex and Field Drives?

Difference between enclosed drives.

Product Line:
EFlex, MFlex and Field Irrigation

All models


E-Flex AC drives are packaged, adjustable speed drive solutions for commercial and industrial pump and fan applications.  It offers a full range of E-Flex drives to meet specific indoor and outdoor applications
Type 1 enclosure for indoor, non-dusty environments
Type 12K enclosure for indoor, dusty/wet environments
Type 3R enclosure for outdoor, rain or shine environments
Available Ratings
1 - 100 HP variable torque 460 VAC, three-phase input
1 - 50 HP variable torque 208/230 VAC, three-phase input (10° to 50°C ambient temperatures)
The S-Flex 212 enclosed drive provides the right features for HVAC pump fan applications.
Available in a NEMA Type 1 enclosure only.
Available Ratings
460 Vac Three Phase / 1 - 100 HP
208/230 Vac Three Phase / 1 - 40 HP
The M-Flex™ enclosed drive featuring either the Altivar® 61 or Altivar 71 drives within a Type 1 general purpose or Type 12/12K drip/dust proof enclosure in integrated or barriered designs.  M-Flex enclosed drive controllers are low voltage products available in the following ratings:
Altivar® 71 power converter
1 to 450 hp, 460 V
1 to 40 hp, 208/230 V
Variable torque (Light duty, 110% current limit)
Altivar 61 power converter
1 to 500 hp, 460 V
1 to 50 hp, 208/230 V
The Field Drive package is a sealed Type 3R enclosure package that completely isolates all the critical internal electronic components from the outdoor elements. 
Oil & Gas
Constant torque (Heavy duty, 150% current limit)
Altivar® 71 power converter
1 to 600 hp, 460 V
1 to 100 hp, 230 V
Variable torque (Standard duty, 110% current limit)
Altivar 61 power converter
1 to 700 hp, 460 V
1 to 125 hp, 230 V Available Ratings
1 to 600 hp, 460 V 

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