Schneider Electric MNB-70 Installation Instructions

MNB-70

Dimensions shown are in inches (mm).

5 (127)

4-19/32 (118)

4-13/32

(112)

3-5/8

(92)

(102)

1-19/32

(41)

3/8 (10)

Figure-1 MNB-70 Mounting Dimensions.

TAC I/A Series MicroNet BACnet

Zone Controller

Installation Instructions

Application

The TAC I/A Series™ MicroNet™ BACnet™ Zone Controller is an interoperable controller with native BACnet MS/TP communications support. This controller incorporates: three universal inputs; three digital (Triac) outputs; one universal output; Sensor Link (S-Link) support; LED status

SW24H1

SW24H2

SW24H3

24H

24G(COM)

GND

STATUS MSTP RCV MSTP XMT

S-LK/COM

MSTP + MSTP -

UO 1

COM

UI 1

COM

UI 2 UI 3

SHLD

indication; and an “I-Am” button.

Model Chart

Model

Number

MNB-70 313

Inputs and Outputs

UI UO DO (Triacs)

Installation

Inspection

Inspect carton for damage. If damaged, notify carrier immediately. Inspect controllers for damage upon receipt.

Requirements

• Installer must be a qualified technician

Precautions

When installing the MNB-70 controller, be sure to follow the guidelines outlined in "Precautions" on page 3.

Location

The MNB-70 controllers are suitable for indoor use only.

Caution:

• Avoid locations where excessive moisture, corrosive

fumes, vibration, or explosive vapors are present.

• Avoid electrical noise interference. Do not install near

large contactors, electrical machinery, or welding equipment.

• Locate where ambient temperatures do not exceed 131°F

(55°C) or fall below 32°F (0°C), and relative humidity does not exceed 85% or fall below 5%, non-condensing.

MNB-70 controllers can be mounted in any direction and on any plane.

Dimensions

Mounting dimensions are shown in Figure-1.

Note: The following items are not provided.

• Job wiring diagrams

• Tools:

– Screw drivers – Digital volt-ohm meter (DVM) – Drill and bits for mounting screw – Static protection wrist strap

• MNA-FLO-1 enclosure for connecting to conduit (optional)

• MS/TP trunk end-of-line termination resistor kit,

120 Ω ±5%, part number 40-1758.

• Class 2 power transformer supplying a nominal 24 Vac,

sized appropriately for the controller (15 VA) plus the anticipated Digital Output (DO) loads. In European Community, transformer must conform to EN 60742

• Two #10 sheet metal screws

Mounting Mount the controller according to the instructions in Figure-2.

SW24H1

SW24H2

SW24H3

24H

G(C

OM)

GND

TUS

TP RCV

P X

UO 1 CO

UI 1

UI 2 UI

-LK/ COM

STP +

SHLD

TP -

Controller

#10 Pan Head

Screws (2)

(not supplied)

Mounting Tab (1 of 2)

1 Select a mounting location on the panel.

Note: The MNB-70 may be mounted in

any orientation.

2 Holding the controller in position,

mark the locations of the two mounting holes on the panel.

3 Set the controller aside and then drill the

marked mounting holes, using a drill bit sized to the #10 mounting screws.

4 Secure the controller to the panel,

using two #10 screws (not supplied).

Panel

Figure-2 MNB-70 Mounting.

Warning: Electrical shock hazard! Disconnect power before installing or removing the cover.

Controller Addressing

DIP Switch

Each MicroNet BACnet controller is equipped with a DIP switch for setting the controller’s MS/TP network address. Once the address is set, the network is properly wired, and all routers are configured, WorkPlace Tech Tool (WP Tech) and other Schneider Electric tools will be able to “see” and work with all the networked BACnet devices. For guidance in assigning a DIP switch setting that will optimize system performance, refer to the WorkPlace Tech Tool BACnet Engineering Guide Supplement, F-27356.

Note: Support for the MNB-70 is only found in WP Tech Version 5.6 and later (covered in Revision 2 of F-27356).

Other BACnet Devices

The UNC and other BACnet devices on the network can work with the MicroNet BACnet controller once they are assigned unique identifiers and names. MicroNet BACnet controllers are configured in this way through the Commissioning Tool.

Note: The logical addressing of devices (i.e. the assignment of unique identifiers and names) is not a prerequisite for using Schneider Electric network management tools. It is, however, a prerequisite for using the UNC and third-party BACnet devices with MicroNet BACnet controllers.

EOL Termination

If the controller is at the end-of-line on the MS/TP trunk, set termination according to the MicroNet BACnet Wiring, Networking, and Best Practices Guide, F-27360, using an end-of-line termination resistor kit, 120 Ω ±5%, part number 40-1758.

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