Operating Instructions

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Operating instructions

BACnet module WZU-485E-BAC

A6V12318605_----_a

2021-01-28

Original language

Siemens Smart Infrastructure A6V12318605_----_a 2021-01-28 1

1. Safety Information

Comply with ESD protection measures.

Avoid short-circuits on the PCB.

When connecting, turn off the mains supply.

Route connecting cables only through the bush

sleeves of the meter.

Do not cut the bush sleeves shorter than necessary

because this may lower the degree of protection.

2. Description of function

WZU-485E-BAC is an add-on communication module for the

following types of meters: UH50.. (firmware 5.15 and higher)

and UC50.. .

The module is intended and preconfigured for data transmis-

sion using the BACnet MS/TP (RS485) protocol.

Note: An external power pack must power the module

(not included in the module’s scope of delivery).

3. Items delivered

1. Communication module WZU-485E-BAC

2. Screw connector for RS485 interface and power supply

4. Installation and assembly

Up to 2 communication modules can be installed.

Number

Description

Service button (under the housing cover)

Slot “module 1”

Slot “module 2”

Bushing for power cable

Cable grommets

Note: WZU-485E-BAC may only be combined with an

M-Bus module in slot “module 2”. Only one of them

may be operated in fast read-out mode with an up-

date interval shorter than 15 min.

Installing the communication module

The communication modules are connected via a 6-pole reac-

tion-free connector so that installation or replacement is possi-

ble at any time.

To install a communication module proceed as follows:

• Press the 4 side lugs of the housing cover inwards and

remove the cover.

• Put the communication module into the correct position.

Note: The module WZU-485E-BAC may only be fitted

at slot “module 1”.

• Place the communication module carefully in both guide

slots and push it in.

• Wait for the module indication on the meter display (Loop 4:

“Modul1 MI / G4”).

• To connect the power supply and the communication cable

of WZU-485E-BAC, open two sleeves matching the cross

section of the respective cables.

Note: Open the cable sleeves in such a way that they

enclose the cable tightly.

• Guide cables through the bush sleeves from the outside.

• Connect the the power supply to terminals 24V and GND,

and the communication cable to terminals A+ and B-.

Note: For the connection to the screw terminal, a slot

screwdriver with 2.5 mm tip is needed.

Attention: Do not connect the power supply to termi-

nals A+ and B-. This may cause permanent damage

to the module.

• Insert the screw connector into its counterpart on the com-

munication module.

• Secure the cables with the metal strain relief.

Summary of content (7 pages)

PAGE 1
s A6V12318605_----_a 2021-01-28 en Operating instructions BACnet module WZU-485E-BAC Original language 1. Safety Information Comply with ESD protection measures. Avoid short-circuits on the PCB. When connecting, turn off the mains supply. Route connecting cables only through the bush sleeves of the meter. Do not cut the bush sleeves shorter than necessary because this may lower the degree of protection. 2.
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Note: The cables used should be as short as possible and their length must not exceed 10 m. 5. LCD display Note: Both display range and data displayed can differ from this description depending on the meter parameterization. Certain button functions can also be blocked. Service loop „LOOP 4“ Head of the loop … … • Press the “Read” button [1]. The software reads and displays the current parameter settings of the module. • Make the necessary settings. • Press the “Write” button [2].
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8. Supported BACnet objects ID Note Name Units Discription 6 digits UH50-RS485 dimensionless Device Instance Number (see chapter 6.2) AI-0 Serial number dimensionless Analog Input AI-1 Energy Energy (Standard register) - Heat energy if heat or combined meter - Cooling energy if cooling meter AI-2 Tariff 1 cooling if comb.
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s A6V12318605_----_a 2021-01-28 de Bedienungsanleitung BACnet Modul WZU-485E-BAC Übersetzung 1. Sicherheitshinweise ESD Schutzmaßnahmen beachten. Kurzschlüsse auf der Leiterplatte vermeiden. Bei Anschlussarbeiten die Netzspannung ausschalten. Anschlussleitungen nur durch die Tüllen des Zählers führen. Tüllen nicht unnötig kürzen, ansonsten ist die Schutzart gefährdet. 2. Funktionsbeschreibung Das BACnet Kommunikationsmodul WZU-485E-BAC ist ein Zusatzmodul für die Zähler vom Typ UH50.. (Firmware ab 5.
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• • Stecken Sie den Schraubstecker in sein Gegenstück auf dem Kommunikationsmodul. Zur Zugentlastung fixieren Sie die Kabel mit den Schellen. Hinweis: Die verwendeten Kabel sollen so kurz wie möglich sein. Die max. Länge beträgt 10 m. Hinweis: Je nach Zählerparametrierung können sowohl Anzeigeumfang als auch angezeigte Daten von dieser Beschreibung abweichen. Darüber hinaus können bestimmte Tastenfunktionen gesperrt sein. Serviceschleife „LOOP 4“ Schleifenkopf … … • Drücken Sie die „Read” Taste [1].
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7. Unterstützte BACnet Objekte Name*) ID Erklärung Einheit Beschrebung 6 Ziffern UH50-RS485 dimensionslos Device Istance Number (siehe Kap. 6.2) AI-0 Serial number dimensionslos Analogeingang kWh / MWh; MJ / GJ entspr. Zähleranzeige kWh / MWh entspr. Zähleranzeige AI-1 Energy Energie (Standardregister) - Wärme bei Wärme- und Kombizählern - Kälte bei Kältezählern AI-2 Tariff 1 cooling if comb.
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