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Flex EX2

The Flex EX2 series of wireless controls offer even more features and greater performance than our first generation Flex EX radios at the same great value. These durable, rugged, and feature-rich radios are ideal for use in material handling, overhead crane, and industrial applications. Flex EX2 transmitters are ergonomic and lightweight, and are available in 4, 6, 8, and 12 button style options to meet all your application needs.

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Frequency Hopping RF Transceiver

The Flex EX2 system automatically search and lock onto a free and uninterrupted channel at every system startup or during operation when encountering radio interference. The system is also capable of two-way communication between the transmitter and receiver and as well as receiver to receiver with status feedbacks (e.g. MAIN relays, output relays, inputs from external sources, and receiver fault detection).

Programmable Transmitter Access Card (TAC)

The optional transmitter access card feature (TAC) further guard against any unauthorized personnel from operating the system. The TAC can also be individually programmed unlocking any specific function or functions on the transmitter allowing a more experienced or qualified user to operate, such as the magnet lift, tandem operation, entering restricted areas, etc... The TAC is based on the RFID technology so any industry standard RFID cards or chips can be programmed into the transmitter, such as the commonly used employee RFID badges.

Zero-G Sensor Imbedded

The transmitter is embedded with a Zero-G sensor to guard against any unintended control of the crane or equipment when transmitter is thrown or dropped. When triggered, the entire system will shut down with exception of the horn function (programmable).

Wireless Remote Pairing Function

System information can be transferred wirelessly between two transmitters or between a transmitter and a receiver without the hassle of resetting the spares.

Infrared Startup & System Programming

All Flex EX2 transmitters and receivers are standard-equipped with infrared sensors for infrared system startup option and system wireless programming.

Advanced Controls

The system utilizes dual advanced microprocessor controls with 32bit CRC and Hamming Code, providing ultra fast, safe, precise and error-free encoding and decoding.

Ultra Reliable Pushbuttons

The in-house designed pushbuttons have gold plated contacts and are rated for more than two million press cycles. The defined snap-action steps provide positive tactile feedback even wearing gloves.

Ultra Durable & Rugged Enclosures

The transmitter and receiver enclosures are made from industrial strength nylon and fiberglass composite material, not ABS plastic. All housings meet the IP66/NEMA4 requirements and are highly resistant to dirt, liquid, acid, alkali, grease and oil penetration. The receiver enclosures and output cables are UL94-V0 rated.

Compact & Lightweight

The ergonomically designed transmitter and receiver enclosures are extremely compact and lightweight for easy operation and installation.

Unique Mounting Bracket

The removable receiver mounting brackets are uniquely designed for easy mounting and dismounting.

Low Power Consumption & Versatility

The transmitter requires only two "AA" alkaline batteries with more than 100 hours of uninterrupted operation between replacements. If rechargeable method is preferred, any off-the-shelf high capacity Ni-MH rechargeable batteries can be used in conjunction with the in-house designed wired and wireless charging stations, fully interchangeable.

Abundant Programmable Functions

All functions and settings are easily set via pushbuttons, dipswitches, jumpers, and in-house designed programmer unit. Customized functions can also be added upon request.

Full Systems Compatibility

The software and hardware are fully compatible regardless of model type, minimizing spare parts inventory. The transmitters are also backward compatible with all EX Gen1 receivers.

Prewired Output Cable

A prewired cable is standard equipment on all Flex EX2 systems.

Pitch & Catch Operation

This standard-equipped function allows two operators controlling from opposite ends of a crane or equipment.

Tandem Operation

This function allows one operator controlling two cranes at the same time via a 3-position A/B/A+B rotary select switch. A special tandem output is provided for external tandem box connection.

Random Access Operation

This function allows multiple operators randomly controlling multiple cranes on a first come - first served basis.

Multiple Receivers Operation

This function allows one operator controlling up to ten receivers or equipment at the same time.

Worldwide Approvals

The Flex EX2 systems are fully tested and certified in accordance with the FCC Part-15 Rules and European Safety Standards such as the EN 301 489-1&3, EN 300 220-1&2, EN 60204-32, EN 60950, EN 60529 and EN 13849-1 Category PLd.

Labels & Accessories

Flex EX2 system is standard-equipped with pushbutton labels, waist belt, vinyl casing, receiver mounting bracket and output cable. Magnet mount, belt clip, lanyard, rubber guards, miniature indicator light & buzzer, charging stations and TAC are optional.


Frequency Range:
433~434MHz, 863~870MHz & 921~927MHz
Digital frequency modulation based on Manchester Code, 20bit address, 32bit CRC Parity Check and Hamming Code
Encoding / Decoding Reference:
Advanced microprocessor controlled
Operating Range:
>100 Meters / 300 Feet
Frequency Control:
Synthesized PLL
Responding Time:
40mS (average)
Receiver Sensitivity:
Transmitter Voltage:
Output Contact Rating:
250VAC @ 8A 250VAC @ 6A (MRX models)
Receiver Voltages:

24VAC @ 50/60Hz
VAC @ 50/60Hz
VAC @ 50/60Hz
110~120VAC @ 50/60Hz
220~240VAC @ 50/60Hz 
380~400VAC @ 50/60Hz
410~460VAC @ 50/60Hz 

24~48VAC @ 50/60Hz (MRX models) 48~240VAC @ 50/60Hz (MRX models) Flex 8ES2/EX2 & 12ES2/EX2 models: 110~120/220~240/380~400/410~460VAC @ 50/60Hz 24/42/48VAC @ 50/60Hz 48/110~120/220~240VAC @ 50/60Hz 9~36VDC

Enclosure Rating:
IP66 / NEMA4
Operating Temperature:

-40°C ~ +75°C

Transmitter Dimensions:
Flex 4ES2/EX2 models: 152mm (L) x 70mm (W) x 44mm (H) Flex 6ES2/EX2 models: 175mm (L) x 70mm (W) x 44mm (H) Flex 8ES2/EX2 models: 198mm (L) x 70mm (W) x 44mm (H) Flex 12ES2/EX2 models: 244mm (L) x 70mm (W) x 44mm (H)
Receiver Dimensions:
Flex 4ES2/EX2 & 6ES2/EX2 MRX models: 120mm (L) x 90mm (W) x 55mm (H) Flex 4ES2/EX2 & 6ES2/EX2 models: 196mm (L) x 149mm (W) x 85mm (H) Flex 8ES2/EX2 & 12ES2/EX2 models: 260mm (L) x 204mm (W) x 83mm (H)
Transmitter Weights:
Flex 4ES2/EX2 models: 249g / 8.8oz (include batteries) Flex 6ES2/EX2 models: 270g / 9.5oz (include batteries) Flex 8ES2/EX2 models: 292g / 10.3oz (include batteries) Flex 12ES2/EX2 models: 341g / 12.0oz (include batteries)
Receiver Weights:
Flex 4ES2/EX2 & 6ES2/EX2 MRX models: 900g / 2.0lb (include output cable) Flex 4ES2/EX2 & 6ES2/EX2 models: 1.76kg / 3.8lb (include output cable) Flex 8ES2/EX2 models: 2.75kg / 6.1lb (include output cable) Flex 12ES2/EX2 models: 3.15kg / 6.9lb (include output cable)

Standard Models

Flex 4ES2

Four (4) single-speed pushbuttons

Flex 4EX2

Four (4) dual-speed pushbuttons

Flex 6ES2

Six (6) single-speed pushbuttons

Flex 6EX2

Six (6) dual-speed pushbuttons

Flex 8ES2

Eight (8) single-speed pushbuttons

Flex 8EX2

Eight (8) dual-speed pushbuttons

Flex 12ES2

Twelve (12) single-speed pushbuttons

Flex 12EX2

Twelve (12) dual-speed pushbuttons

MRX (Flex 4 & 6 models)

Up to 10 outputs

Compact Receiver (Flex 4 & 6 models)

Up to 10 outputs

Standard Receiver (Flex 8 & 12 models)

Up to 26 outputs

Output Diagrams


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Any questions? Check with the Manager!

You can leave a request and we will contact you on your question or call us at the phone number: 8 800 550 60 25

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