The enclosures you use in the EcoStruxure BMS smoke control system must meet the following minimum criteria.
Any enclosures you use to house controllers and products participating in the smoke control system must be UL Listed under one of the following UL Standards:
UL 50 Enclosures for Electrical Equipment
UL 508/508A Industrial Control Panels
UL 864 Control Units and Accessories for Fire Alarm Systems
Compliance with one of those standards will regulate the dimensions of the enclosures sides (height, width, depth), the gauge of metal used to produce the enclosure and the strengthening/forming of the metal necessary for the gauge metal used.
The enclosures you use for the PS-24V, Automation Server (AS-SMK), AS-P (AS-P-SMK), SmartX IP controllers and the I/O modules must also provide a minimum metal surface area based on the power (watts) being dissipated inside the enclosure.
The selected metal enclosure must provide a minimum volume of 125 cubic inches for each watt of power that is dissipated in the enclosure. The value referenced here now extracts the 10 watts for the PS24V supply that was fixed in the previous document calculation. The calculated PS24V watts is now added to the accumulated IO bus device power in the enclosure. This scheme accommodates the additional power encountered when more than one PS24V is mounted in the enclosure and also those situations where no PS24V is required in the enclosure.
For example, an enclosure that measures 24 inches (610 mm) high x 24 inches (610 mm) wide x 10 inches (254 mm) deep provides a volume of 5760 cubic inches. Dividing 5760 by 125 produces a max power value of 46 watts. For the 24x24x10 sized enclosure, the sum of the name plate power ratings for the Smoke Control Server and I/O modules and the calculated PS24V power and any accessory devices must not exceed the 46 watts value.
The PS24V power reaches the 10W maximum when its output is the full 30W to the server and I/O modules on the bus. To calculate the PS24V power disipation, you multiply the percentage of full output power by 10 and enter the resulting value in the accumulated power table as follows.
PS24V Power Disipation = Output Watts / 30 * 10
In your calculations, be sure to also include any accessory items such as an EIS series Ethernet Switch (6W for Copper version and 10W for Fiber version) and the 24 VAC power transformer (if mounted in the same enclosure).
The approved 24 VAC transformers have output ratings ranging from 40 VA to 240 VA. The efficiency of the transformer determines the amount of that maximum load VA that will be dissipated in the enclosure as heat.
For more information, see Smoke Control Enclosures and Requirements .
For more information, see Transformers .
Schneider Electric provides several general purpose enclosures recommended for use with the EcoStruxure BMS smoke control system including the following:
SEBOX Series
MNA-FLO-1
MNB-300-ENC
UL-ENCL
SEBOX includes a series of UL NEMA 4 rated enclosures with the following features:
UL Listed under UL 508A on file E103582
Large embedded cable-entry plate with neoprene seal
Standard 3-mm double-bar lock with screw driver lock feature
Optional key lock KEL-RET4-LOCK with key (405)
Foamed-in polyurethane gasket doors that guarantee water and dust tightness
Removable and reversible door with hinges allowing door to open 120°
Available with optional field-installed perforated subpanel (P suffix models)
Epoxy-polyester resin finish, color RAL 7035 grey
A variety of SEBOX enclosure sizes are available as shown in the table that follows.
Model Number a |
Description |
Width |
Perf. Panel Dimensions HxW in (mm) |
SEBOX121806 |
12x18x6 enclosure |
11.8 in (300 mm) x 17.7 in (450 mm) x 5.9 in (150 mm) |
|
SEBOX121806P |
12x18x6 enclosure with perforated panel |
11.8 in (300 mm) x 17.7 in (450 mm) x 5.9 in (150 mm) |
9.5 (241.3) x 15.5 (393.7) |
SEBOX161608 |
16x16x8 enclosure |
15.6 in (400 mm) x 15.6 in (400 mm) x 7.9 in (200 mm) |
|
SEBOX161608P |
16x16x8 enclosure with perforated panel |
15.6 in (400 mm) x 15.6 in (400 mm) x 7.9 in (200 mm) |
13.6 (354.4) x 13.6 (345.4) |
SEBOX202010 |
20x20x10 enclosure |
19.7 in (500 mm) x 19.7 in (500 mm) x 9.8 in (250 mm) |
|
SEBOX202010P |
20x20x10 enclosure with perforated panel |
19.7 in (500 mm) x 19.7 in (500 mm) x 9.8 in (250 mm) |
17.5 (444.5) x 17.5 (444.5) |
SEBOX242408 |
24x24x8 enclosure |
23.6 in (600 mm) x 23.6 in (600 mm) x 7.9 in (200 mm) |
|
SEBOX242408P |
24x24x8 enclosure with perforated panel |
23.6 in (600 mm) x 23.6 in (600 mm) x 7.9 in (200 mm) |
21.7 (551.2) x 21.7 (551.2) |
SEBOX392410 |
39x24x10 enclosure |
39.4 in (1000 mm) x 23.6 in (600 mm) x 9.8 in (250 mm) |
|
SEBOX392410P |
39x24x10 enclosure with perforated panel |
39.4 in (1000 mm) x 23.6 in (600 mm) x 9.8 in (250 mm) |
37.5 (925.5) x 21.7 (551.2) |
SEBOX393210 |
39x32x10 enclosure |
39.4 in (1000 mm) x 31.5 in (800 mm) x 9.8 in (250 mm) |
|
SEBOX393210P |
39x32x10 enclosure with perforated panel |
39.4 in (1000 mm) x 31.5 in (800 mm) x 9.8 in (250 mm) |
37.5 (925.5) x 29.5 (749.3) |
SEBOX483212 |
48x32x12 enclosure |
47.2 in (1200 mm) x 31.5 in (800 mm) x 11.8 in (300 mm) |
|
SEBOX483212P |
48x32x12 enclosure with perforated panel |
47.2 in (1200 mm) x 31.5 in (800 mm) x 11.8 in (300 mm) |
45 (1143) x 29.3 (744.2) |
The SEBOX enclosure and perforated panel model weights are also supplied in this document. For more information, see UL 864 Smoke Control Enclosure Mounting Hardware .
The following graphics illustrate the dimensions of the SEBOX enclosures. The first figure shows the dimensions of the smaller enclosure models, the SEBOX121806 and SEBOX161608.
The second figure shows the dimensions of the larger enclosures, including the SEBOX202010, SEBOX242408, SEBOX392410, SEBOX393210, and SEBOX483212.
The following SEBOX enclosures are less than 800 mm wide:
SEBOX121806
SEBOX161608
SEBOX202010
SEBOX242408
SEBOX392410
These SEBOX enclosures are greater than 800 mm wide:
SEBOX393210
SEBOX483212
The graphic that follows shows the SEBOX cable entry dimensions and types. The cable entry letters in the graphic correspond to these particular SEBOX models:
Cable entry B: SEBOX121806
Cable entry C: SEBOX161608
Cable entry D: SEBOX202010, SEBOX242408 and SEBOX392410
Cable entry E: SEBOX393210
Cable entry: H: SEBOX483212
The Key Lock option is available under part number KEL-RET4-LOCK listed on iPortal. This locking accessory is used on the CRN series enclosures such as the SEBOX and provides 1 metal cam, 1 escutcheon with key lock and 2 keys (Key 405). The part number is equivalent to the NSYCLL405CRN as seen on datasheets under that number.
The P suffix version of the SEBOX includes a perforated back plate for mounting the controller products. The perforated plate version of the SEBOX202010 is shown here as an example.
The SEBOX models and the A-D dimensions for each of their perforated plate versions are listed in the table that follows.
SEBOX Model |
Dimension A |
Dimension B |
Dimension C |
Dimension D |
SEBOX121806P |
9.376 in, 247.3 mm |
15.618 in, 396.7 mm |
8.875 in, 225.43 mm |
14.750 in, 374.65 mm |
SEBOX161608P |
13.625 in, 346.08 mm |
13.625 in, 346.08 mm |
12.750in, 323.85 mm |
12.750 in, 323.85 mm |
SEBOX202010P |
17.590 in, 446.91 mm |
17.590 in, 446.91 mm |
16.750 in, 425.45 mm |
16.750 in, 425.45 mm |
SEBOX242408P |
21.500 in, 546.1 mm |
21.500 in, 546.1 mm |
20.625 in, 523.88 mm |
20.625 in, 523.88 mm |
SEBOX392410P |
37.312 in, 947.74 mm |
21.562 in, 547.69 mm |
36.375 in, 923.93 mm |
20.625 in, 523.88 mm |
SEBOX393210P |
37.250 in, 946.15 mm |
29.376 in, 746.15 mm |
36.375 in, 923.93 mm |
28.500 in, 723.9 mm |
SEBOX483212 |
45.184 in, 1147.68 mm |
29.368 in, 745.95 mm |
44.312 in, 1125.54 mm |
28.500 in, 723.9 mm |
Prior to the introduction of the SEBOX series wall-mounted enclosures, Schneider Electric provided a collection of wall-mounted enclosures referred to as the Unity Series enclosures. These are no longer supplied by Schneider Electric. However, you can still acquire them directly from Unity Manufacturing (see the following details). On existing projects, it may be appropriate and more convenient to expand or revise a project with the same style and size enclosures as previously installed.
Model Number |
Material |
Width |
Height |
Depth |
Volume Cubic Inches |
UNM-SCH13186RC |
16gaCRS |
13 in (330 mm) |
18 in (457 mm) |
6 in (152 mm) |
1410 (23,105 cm) |
UNM-SCH181810RC |
16gaCRS |
18 in (457 mm) |
18 in (457 mm) |
10 in (254 mm) |
3240 (53,094 cm) |
UNM-SCH242410RC |
16gaCRS |
24 in (610 mm) |
24 in (610 mm) |
10 in (254 mm) |
5760 (94,389 cm) |
UNM-SCH243610RC |
16gaCRS |
24 in (610 mm) |
36 in (914 mm) |
10 in (254 mm) |
8640 (141,584 cm) |
UNM-SCH303610RC |
14gaCRS |
30 in (762 mm) |
36 in (914 mm) |
10 in (254 mm) |
10800 (176,980 cm) |
UNM-SCH304810RC |
14gaCRS |
30 in (762 mm) |
48 in (1219 mm) |
10 in (254 mm) |
14400 (235,973 cm) |
You obtain the Unity Manufacturing enclosures at the following address:
Unity Manufacturing
210 E. Buckingham Rd.
Garland Texas 75040
972-272-9502
Ensure that the power limited wiring in the enclosure is separated from the non-power limited wiring, such as the line voltage to the transformers and possible Digital Output relay output control wiring. Refer to the UL 864 Smoke Control System Enclosure Guide for additional information on the enclosures, their general requirements, and available options.
The MNA-FLO-1 is a small enclosure designed for mounting over the damper shaft and fastening to the VAV box panel. The MNA-FLO-1 accomodates the internal mounting of VAV controllers, such as the MP-V-7A-SMK, MP-V-9A-SMK, b3865-V-S, b3866-V-S, b3885-V-S, MNB-V1-2 and MNB-V2-2. The following figure shows the MNA-FLO-1 enclosure.
The MNA-FLO-1 provides knockouts in the positions shown for .50 inches (13 mm) or .75 inches (19 mm) conduit connections.
For more information, see MNA-FLO-1 Enclosure .
The MNB-300-ENC is a small enclosure designed specifically to house the MNB-300 controller. You can mount this enclosure on a wall or panel. Four integrated mounting studs are provided in the base for attaching the MNB-300.
Conduit connections are supported with two knockouts along the top and bottom of the unit. Each knockout provides a double size supporting a 0.875 inch (22 mm) hole for .50 inch (13 mm) conduit, or a 1.125 inch (28 mm) hole for .75 inch (19 mm) conduit.
Typically, the UL-ENCL is a small enclosure you use with field controllers. This enclosure is 19 inches (483 mm) high, 15 inches (381 mm) wide, and approximately 4 inches (102 mm) deep, including a 3 inch (76 mm) base with a two tiered door. Vent louvres are provided on the left and right sides of the enclosure.
You can wall mount this enclosure using the two key slot holes (.28 inch (7 mm) x .50 inch (13 mm)) along the top of the enclosure and two .28 inch (7 mm) along the bottom of the enclosure.
The UL-ENCL enclosure does not feature a DIN rail. Instead, you mount controllers and expansion modules using screws fastened through the pre-drilled backplate. A key lock and a tamper switch are also provided for added security. The enclosure provides space to accommodate controller and power transformer mounting.
For conduit connections, 1.65 inch (42 mm) knockouts are available on the right (2), left (1), top (2), bottom (2) and rear (2).
Ensure that the power limited wiring in the enclosure is separated from the non-power limited wiring, such as the line voltage to the transformer and possible relay output control wiring. The minimum separation is .25 inch (6 mm).
The I2-ENCL-S enclosure is the same design and is used for the same applications as the model UL-ENCL enclosure described previously. The model UL-ENCL replaces the I2-ENCL-S enclosure. However, you may encounter existing I2-ENCL-S enclosures when upgrading an existing system to an EcoStruxure BMS smoke control system. The continued use of the I2-ENCL-S enclosure is approved in the EcoStruxure Building Operation system.
Typically, the 3P-UL-ENCL enclosure is a legacy system enclosure used with Continuum DIN rail mounted controller products. The enclosure measures 36 inches (913 mm) x 24 inches (610 mm) x 6.5 inches (165 mm) (Height x Width x Depth) and provides 3 DIN rails that you can use for mounting the power supply, controller and I/O modules. Generally, the Unity series enclosures are used for new system installations, but the 3P-UL-ENCL is also approved for use in the EcoStruxure Building Operation smoke control system.
The VAV-ENCL-S is a small enclosure specifically designed for VAV controllers such the b3865-S and b3866-S. Typically, this enclosure is not sold with new systems. However, you may frequently encounter it when upgrading previous systems to the EcoStruxure BMS smoke control system. You can also use this enclosure when changing to any of the other listed VAV controllers. Refer to the EcoStruxure BMS Smoke Control Design Guide for more information.
This enclosure is 14.25 inches (362 mm) high, 12.3 inches (312 mm) wide, and approximately 4 inches (102 mm) deep. A .88 inch (22 mm) hole is provided in the rear for insertion of the VAV damper shaft and mating with the VAV actuator collar. For conduit connections, three knockouts are provided on the bottom and one on the right of the unit.
Ensure that the power limited wiring in the enclosure is separated from the non-power limited wiring, such as the line voltage to the transformer and the relay output control wiring. The minimum separation is .25 inch (6 mm).
The Unity series enclosures have been in wide use for a number of years with the Continuum series controllers. The SEBOX and Unity enclosure models referenced here are approved for use with smoke control systems for housing the legacy controller models described in this guide. These enclosures provide additional space for the controllers, accessories, and the segregation and routing of controller wiring.
When used with the b3, i2, b-Link, Infilink and other referenced accessory items, select the enclosure size that achieves a metal enclosed volume of 71 cubic inches (or larger) per watt using the accumulated ratings for the controller devices. You can include transformers listed in the Smoke Control System Design Guide in the enclosure. For more information, see Transformers .
You must position the legacy controller assemblies and accessory electronics devices in the enclosure to provide a minimum vertical space of 1 inch (25.4 mm) above the transformer and a minimum horizontal space of .50 inch (12.7 mm) between the transformer and the electronics.
As an example, consider the following legacy application.
The most commonly used model UNM-SCH242410RC enclosure provides a 24 inch (609.59 mm) x 24 inch (609.59 mm) x 10 inch (254 mm) size that you can use to house a b3/i2920 controller along with the two supported xP expansion modules. The controller is 45VA and the expansion is 6VA (maximum for the two xP modules) giving a total of 51VA. This delivers 123 cubic inches per watt which complies with the 71 cubic inch minimum.