Automated Logic U141v+ Teknik Talimatlar - Sayfa 5

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Figure 5). The U141v+'s address must be the

same as its FB number in the UNI.

For example, if the module's FB number is

nine, set the tens switch to zero and the ones

switch to nine.

Figure 5. Dual Rotary Address Switches

The U141v+'s BACnet Device Instance

number can be assigned by the UNI or

individually specified. This number is shown

on the UNI Properties page in WebCTRL or on

the UNI Status page in SuperVision.

Power Wiring

The Unet follows the same specifications as a

legacy CMnet. Refer to the Technical

Handbook for details on legacy CMnets. Also

refer to the Technical Handbook for detailed

information on daisy-chain, star, and hybrid

wiring configurations.

There is a special wire available that contains

a pair of 14AWG wires for power and a pair of

22AWG wires for communication. This wire is

available from:

Magnum Cable Corporation

Cleveland, OH 44110-0500

(800) 421-0820

Product number A3U-LINE

CAUTION The U141v+ modules are Class 2

devices (less than 30VAC, 100VA maximum).

Take appropriate isolation measures when

mounting a U141v+ module in a control panel

where Non-Class 2 devices (120V and

greater) or wiring are present.

You can power several modules from the

same transformer by daisy-chaining the

Revised 8/14/02 • U141v+

power from one U-Line module to the next,

using the two power connections on the

U141v+ (one for incoming power and the

other for continuing the wiring to the next U-

card). You must maintain the same polarity.

Do not exceed 100VA or 500 feet (152.4

meters) total of 14AWG wire. The maximum

number of modules on one transformer can

be figured by dividing the VA of the

transformer by the sum of the VA of the

module plus the VA of any accessories. For

example, if the module's power is 9VA,

accessories per module equal 6VA, and the

transformer is 100VA, you could have up to 6

modules on the network. See the formula in

Figure 6 and the example in Figure 7.

VA (transformer)

VA (module) + VA (accessories)

Figure 6. Figuring Maximum Number of Modules

100VA

9VA + 6VA

Figure 7. Example of Figuring Maximum Number

of Modules

The U141v+ has an operating range of

21.6VAC to 26.4VAC. Whenever possible,

connect and verify power and

communications to all modules before

connecting any inputs or outputs.

1. Remove the U141v+'s power jumper or

place it in the off position. This prevents

the module from being powered up before

verifying correct voltage.

2. Make sure the 24VAC power source is off.

3. Connect the power wires to the module's

power terminals labeled 24VAC and Gnd.

4. Turn the 24VAC power source on.

5. Make sure that 24VAC is present at the

module's power input terminals.

Maximum #

of modules

(rounded down)

6.67 or

6 modules maximum