Lenze i550 protec Decentral Frequency Inverter

Name: Lenze i550 protec Decentral Frequency Inverter – Datasheet
Brand: Lenze
SKU: i550 protec

Decentral frequency inverter for conveyors, pumps and fans

The Lenze i550 protec is a decentral frequency inverter that uses the same hardware and software as the i500 cabinet inverters, in a housing built for mounting on the machine instead of inside a control cabinet. Lenze rates it for 0.37 to 11 kW in the data sheet, while the current lenze.com product page lists 0.37 to 75 kW, so check the type code for larger ratings. It is meant for motor applications that need dynamic speed and torque control, such as conveyors, travelling and winding drives, extruders, packaging machines, pumps and fans.

The data sheet states ingress protection of IP66 (NEMA 4X), which allows use against high-pressure water jets and dust in harsh surroundings. Mounting the inverter close to the motor saves cabinet space and cabling, which is the main reason to go decentral on large machines.

Technical specifications

Parameter	Specification
Product	Lenze i550 protec frequency inverter
Power range (data sheet)	0.37 to 11 kW (0.5 to 15 hp)
Overload current	Mode S1: 150%; mode S6: 200%
Control	V/f characteristic linear/quadratic (VFC plus); sensorless vector control (SLVC); energy saving (VFC-Eco); servo control (SC-ASM) with feedback; sensorless vector control for synchronous motors
I/O	5 digital inputs, 1 digital output, 2 analog inputs, 1 analog output, relay
Other interfaces	External 24 V supply; PTC/thermal contact input; HTL incremental encoder (100 kHz); USB onboard
Fieldbus options	CANopen, EtherCAT, EtherNet/IP, Modbus RTU, Modbus TCP, PROFINET, IO-Link
Braking	Integrated brake chopper; DC bus connection; DC braking; low-wear brake management
Safety	Safe torque off (STO); optional SIL 3 / PL e according to Lenze
Degree of protection	IP66 (NEMA 4X)
Approvals	CE, UL, CSA, EAC, RoHS2; IE2 in accordance with EN 50598-2

Mains connections and power classes

Mains	Power range
1 AC 120 V	0.37 to 1.1 kW (0.5 to 1.5 hp)
1 AC 230 V	0.37 to 2.2 kW (0.5 to 3 hp)
1/3 AC 230 V	0.37 to 2.2 kW (0.5 to 3 hp)
3 AC 230 V	3 to 11 kW (4 to 15 hp)
3 AC 400 V / 480 V	0.37 to 11 kW (0.5 to 15 hp)
3 AC 600 V	0.75 to 2.2 kW (1 to 3 hp)

Commissioning and options

Three set-up methods are offered. The keypad covers the key parameters such as acceleration and deceleration time. The smart keypad app for Android or iOS handles simple applications such as conveyor belts, and the EASY Starter engineering software is used when holding brake control, vector mode or fieldbus parameter mapping must be set. An EPM memory module allows simple series commissioning and device replacement.

The product page lists versions with or without a repair switch, with a keypad or a WLAN diagnostic module, and an IO-Link interface V1.1 for decentral drives. A micro USB diagnostic interface is integrated. The exact type code, supply voltage and fieldbus must be chosen from the Lenze selection tools before ordering.

Documents and quotation

The attached Lenze data sheet (10/2019, from Lenze Americas) contains the mains and power table above. Ratings can differ between regions and newer product revisions, so confirm the type code with Lenze documentation. For a quotation, send the supply voltage, motor power, required fieldbus, IP class and whether a repair switch or STO is needed. Related drives are listed under AC drives.

Lenze develops drive and automation technology for machine building, with products and systems spanning mechatronics, control hardware and engineering software. Its frequency inverters, motion equipment and accessories are selected as parts of the complete machine application. Supply voltage, motor current, control interface, mounting arrangement and the required protective equipment all affect the correct execution. Lenze also provides software and digital services for automation and machine engineering. When replacing installed equipment, preserve the full model and option codes together with the parameter and wiring records. Seven Star LLC quotation enquiries for Oman and the GCC should include the requested references, quantities, application details and any separately required drive accessories.

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