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Brand: Schischek
Schischek ExMax-S-BF Ex Rotary Actuator with Ex-i Trip Circuit
Description
Spring-return actuator prepared for a temperature trigger
The Schischek ExMax-S-BF is the fire damper member of the size S ExMax line. It adds an intrinsically safe Ex-i tripping circuit to a spring-return actuator, so an ExPro-TT safety temperature trigger can be plugged in through an M12 quick connection and release the damper when the trigger responds. Two integrated auxiliary switches report the end positions. The datasheet states the BF types qualify for integration into fire damper systems under EN 15650, EN 1366-2 and EN 13501-3.
Technical specifications
| Parameter | Specification |
|---|---|
| Types | ExMax-5.10-BF (5 / 10 Nm motor, spring min. 10 Nm) and ExMax-15-BF (15 Nm, spring min. 15 Nm) |
| Feedback / signals | 2 aux switches at 5 and 85 degrees plus Ex-i tripping circuit; wiring SB 7.0 / 7.1 |
| Supply | 24 to 240 VAC/DC, self-adapting |
| Control mode | On-off and 3-position with spring return |
| Motor running time | 3 / 15 / 30 / 60 / 120 s per 90 degrees; 5 Nm and 30 s at delivery for the 5.10 type |
| Spring return | 3 or 10 s per 90 degrees; min. 10,000 safety operations at 10 s and 1,000 at 3 s |
| Ex-i circuit | Connects the ExPro-TT safety temperature trigger directly to the actuator; circuit data in the datasheet table T 1.0 |
| Auxiliary switches | Potential free; 250 VAC / 5 A, 48 VDC / 1 A maximum |
| Cable | About 1 m, diameter about 9.6 mm, M16 x 1.5 gland; Ex-e terminal box required in hazardous areas |
| Dimensions / weight | 210 x 95 x 80 mm; about 3.5 kg (stainless about 7 kg); 12 x 12 mm double square shaft |
| Ambient | Working -40 to +40 degrees C at T6, up to +50 degrees C at T5 |
| Certification as printed | EPS 17 ATEX 1 132 X, IECEx EPS 17.0065X; Ex db [ib Gb] IIC T6, T5 Gb and Ex tb [ib Db] IIIC T80/T95 degrees C Db; CE0158; IP66 |
How the Ex-i trip circuit is used
In a fire damper installation the trigger sits in the airflow and opens a circuit when its temperature limit is reached. Because the actuator has the Ex-i input built in, the trigger connects without a separate barrier box, and the spring return closes the damper. Standard torque is selectable on site and the spring return time can be set to about 3 or 10 s.
What to confirm before ordering
State the type code with suffix, torque, the trigger model and its rated temperature, and the damper approval basis, since fire damper certification applies to the complete damper assembly and not to the actuator alone. Add the Ex-e terminal box if needed, plus weather shield and shaft adapters. The picture is a manufacturer family image of the size S ExMax and not specifically a BF unit; the type label is not legible at this size.
Documents and quotation
The manufacturer’s datasheet PUB113-440 for the ExMax-S-BF is attached to this page as a download. Seven Star LLC is an independent supplier in Muscat. Price, delivery time and availability are quoted once we have the type code, torque, running time and quantity. Other actuators are listed in Valve Actuators.
Datasheets & Documents
- Datasheet Rotork Schischek ExMax-S-BF datasheet PUB113-440 Download
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About brand
Schischek makes explosion-proof HVAC products, including damper and valve actuators, sensors and controllers, and is now a Rotork brand. Seven Star LLC lists the Schischek ExMax and RedMax rotary actuators on this page and supplies them from Muscat as an independent supplier, with each type code checked against the manufacturer's datasheet.
Schischek actuator families listed here
The ExMax line is ATEX tested for zones 1, 2, 21 and 22 and comes in a size S housing (5 to 30 Nm) and a size M housing (24 to 150 Nm). The RedMax line shares the size M housing but is tested for zone 2 and zone 22 locations. Versions on this page include 3-position and on-off drives, spring return actuators, the BF type with an Ex-i tripping circuit for fire damper temperature triggers, 4 to 20 mA and modulating Y types with feedback, and a multi-turn type. All run from a 24 to 240 VAC/DC supply unless the datasheet states 24 V only.
Ordering Schischek actuators: what we need
Send the complete type code including the suffix and coating option, the torque, the running time, the supply voltage and the zone and temperature class of the installation. Terminal boxes, brackets, weather shields and shaft adapters are listed in each datasheet as separate accessories, so name them in the request.
Related products
Frequently Asked Questions
What does the BF suffix mean?
An integrated Ex-i tripping circuit for the ExPro-TT safety temperature trigger, together with spring return and two auxiliary switches.
Which torque ratings exist?
5 / 10 Nm for the 5.10-BF and 15 Nm for the 15-BF, each with a spring torque of at least 10 and 15 Nm.
Which fire damper standards does the datasheet cite?
EN 15650, EN 1366-2 and EN 13501-3.
What temperature limits apply?
Working temperature is -40 to +40 degrees C at T6 and -40 to +50 degrees C at T5.
Does the actuator carry ATEX approval?
The datasheet lists EU-Type Examination EPS 17 ATEX 1 132 X and IECEx EPS 17.0065X with Ex db [ib] markings.
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