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The PositionServo is a fully programmable high performance servo drive with low cost of ownership, low opportunity cost and extremely high value. The drive can function in three fundamental operating modes: torque, velocity, and positioning.

400/480 VAC models are also offered from 2 to 9 Amps. All PositionServo drive models feature a 300% peak current capacity at a 50% duty cycle for a 2 second bandwidth. This means the drive is capable of providing 300% peak current for 2 out of every 4 seconds of time enabled.

AC Tech PositionServo 941 Servo Drive Distributor


Programming Instructions

The drive can be used in torque control, velocity control , electronic gearing and programmable motion control applications. The drive is capable of registration and features 11 programmable digital inputs, 4 programmable digital outputs 2 analog inputs and 1 analog output. The drive is programmed in a basic like language which supports fault monitoring and deterministic event handling. These features allow the PositionServo to be the best value solution for a wide variety of applications.

If you are looking for AC Tech Model 941 Servo Drives, please call us at (844) 331-9371 or email us at we will do our best to help you find fully programmable high performance servo drive that you are looking for at the most competitive prices possible. If you are searching for model 941 resolver based brushless servo drive technical information (data-sheets) please use the datasheets or product selection guide page links.

A Fully Programmable Digital AC Brushless Servo Drive with:

  • Sinusoidal Commutation
  • Digital Signal Processing (DSP)
  • Field-oriented Control
  • Encoder & Resolver Feedback
  • Multiple power levels
  • Multiple input voltages
  • Multiple communication options

Power ranges for the 230V models are from 2 to 18 Amps.

The 940 and 941 are both PositionServo drives. The difference is only that the 940 (E94P) uses encoder feedback from the servo motor (with a DB-15 connector) whereas the 941 (E94R) uses resolver feedback (from a DB-9 connector).

All current PostionServo drives are equipped with an Ethernet port for programming and monitoring purposes. The Ethernet port also natively supports both Modbus TCPIP and Ethernet IP protocols as a slave. Support of these two industrial protocols allows many popular controls to interface to the PositionServo.

A Devicenet slave communication option module and a Profibus DP-V0 slave communication module are also available. The lower option bay on the drive is currently not used and is reserved for future option modules.

The drive can be supplied with 24VDC power (500mA) to keep the logic alive during a loss of mains power. This 24V keep alive circuit allows the drive to respond to both I/O and communications, in addition to retaining position through a loss of mains power. As the PositionServo does not support absolute encoders, the drive must be re-homed after a power interruption if 24VDC keep alive power is not supplied to the drive. The drive also has a PTC input to monitor resistance of a motor's integral temperature sensor (if the motor is so equipped) to prevent thermal overload of the motor.

The PositionServo features Lenze's EPM technology. The Electronic Programmable Module (EPM) is a removable memory module containing the drive's program and all drive parameters. This feature allows easy field replacement. Lenze also offers an optional EPM programmer which can copy EPM modules. This optional programmer makes OEM programming of large numbers of drives quick and easy.

The display also has five LEDs. The "Enable" LED indicates the drive is enabled (producing current to control the motor). The "Regen" LED indicates that the drive is regenerating power and the regen chopper circuit is active. The "Data Entry" LED will flash yellow when the user is accessing a parameter on the front panel display that may be edited by the drive's three button keypad (for example the fourth octet of the drive's IP address). The "COM Fault" LED indicates a communications fault on a CANOpen network (This indication only functions when the optional CANOpen communication module is installed). The "Comm Activity" LED flashes to indicate communications activity on the drive's Ethernet port. If the communications activity is fast enough - the blinking may appear to become a solid "on" LED.

The main menu headings include drive status, hardware revision, firmware revision, baud rate and serial address (for drives equipped with a RS-485 communication option card), Fault history.

All I/O wiring for the drive is landed to the 50 pin SCSI. This includes wiring points for a master encoder (for electronic gearing or step and direction command) as well as a buffered encoder output which can be wired back to a motion controller or to the master encoder input of another drive to synchronize or gear movement.

Two analog inputs are present. Both are 12 bit resolution (11 bit + sign) and have a range of +/- 10V. Both may be used in the user program. Analog input 1 can also be used as an external reference for either velocity or torque modes. A 10 bit resolution 0-10VDC analog output is also present. It can be either used as a free output in the user program or it can be assigned a special function (i.e to indicate output phase current).

Lenze also offers a 2 meter long SCSI to flying lead cable to facilitate wiring the drive to third party terminal blocks. The part number of this optional cable is EWLN002SF1NA.

The buffered encoder output has a minimal electrical delay. Delay time for encoder based drives is approximately 100 nanoseconds. Resolver drives internally convert the resolver signal to a user selectable scaled encoder output. This is done by setting the parameter "Resolver Tracks" in the drive's main parameters. The delay time for the buffered encoder when using the 941 drive is 62 micro seconds.

Whether we have model 941 servos in stock in Boise Idaho or need to ship direct from Lenze to any USA cities; ACTECHDRIVES.COM can get resolver based servo drives to you fast and save you some money. Our industrial factory automation supplies distributors warehouse stocks some model 941 positionservo enabling us to further assist you in finding the correct brushless servo drive in the USA, Canada, or Mexico. It will be very helpful if you have the model 941 servos part numbers ready, then our sales representatives can provide you with a pricing and availability quote for model 941 servo drives that you are looking for in seconds. If you do not have the part numbers for model 941 positionservo, our application engineers will be able to help you figure out the part numbers and get the price quote to you as soon as possible.

Model Number Power Current Output Dimensions inches (mm)
Hp kW H W D
Resolver Feedback 120 or 240 Volt input, 240 Volt Output
E94R020S1NRM 2 6 0.7 7.49 (190) 2.68 (68) 7.49 (190)
E94R040S1NRM 4 12 1.4 7.49 (190) 2.72 (69) 7.49 (190)
Models with ISO13840-1 safety circuit end in "S" suffix rather than "M" as in models above. Output voltage will be twice line voltage when connected to a 120V source. Output voltage will not exceed line voltage when connected to a 240V source.
Resolver Feedback 200/240 Volt 1-Phase input
E94R020S2FRM 2 6 0.7 7.49 (190) 2.68 (68) 9.26 (235)
E94R040S2FRM 4 12 1.4 7.49 (190) 2.72 (69) 9.26 (235)
E94R080S2FRM 8 24 2.8 7.49 (190) 3.43 (87) 9.26 (235)
E94R100S2FRM 10 30 3.5 7.49 (190) 4.02 (102) 9.26 (235)
Resolver Feedback 200/240 Volt 1 or 3-Phase input
E94R020Y2NRM 2 6 0.7 7.49 (190) 2.68 (68) 7.49 (190)
E94R040Y2NRM 4 12 1.4 7.49 (190) 2.72 (69) 7.49 (190)
E94R080Y2NRM 8 24 2.8 7.49 (190) 3.75 (95) 7.49 (190)
E94R100Y2NRM 10 30 3.5 7.49 (190) 4.49 (114) 7.49 (190)
E94R120Y2NRM 12 36 4.2 7.49 (190) 2.68 (68) 9.26 (235)
E94R180T2NRM 18 54 6.2 9.53 (242) 2.68 (68) 9.26 (235)
Resolver Feedback 400/480 Volt 3-Phase input
E94R020T4NRM 2 6 1.4 7.49 (190) 2.68 (68) 7.49 (190)
E94R040T4NRM 4 12 2.8 7.49 (190) 3.75 (95) 7.49 (190)
E94R060T4NRM 6 18 4.2 7.49 (190) 2.68 (68) 9.26 (235)
E94R090T4NRM 9 27 6.2 9.53 (242) 2.68 (68) 9.26 (235)
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