LK0

With digital KNX bus interface

Compact unit for VAV terminal units TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio, TVZ, TVA and TVM

Controller, dynamic effective pressure transducer and actuator in one casing
Use in ventilation and air conditioning systems, only with clean air
Volume flow rates q_vmin and q_vmax are factory set and and stored in the controller (but can be changed)
Data transparency due to bus communication
Communication interface KNX (S-mode, LTE-mode and PL-link)
Setpoint value default setting, override control and parameter adjustment by means of bus communication
Service access for manual adjustment devices and PC configuration software

General information

Application

All-in-one control device for VAV terminal units
Dynamic differential pressure transducer, electronic controller, and actuator are fitted together in one casing
Choice of various control options based on setpoint value default setting
Setpoint value defaults and override controls by means of communication with a higher-level system
Support of central BMS optimisation functions by providing network communication
The volume flow rate actual value is available as a network data point
The damper blade position is available as a network data point
Standard filtration in comfort air conditioning systems allows for use of the controller in the supply air without additional dust protection

With heavy dust levels in the room

Install suitable exhaust air filters upstream because a partial volume flow is routed through the transducer for volume flow rate measurement

If the air is contaminated with fluff, sticky components or aggressive substances

Use a control component with static differential pressure transducer

Control strategy

The volume flow controller works independent of the duct pressure
Differential pressure fluctuations do not result in permanent volume flow rate changes
To prevent the control from becoming unstable, a dead band is allowed within which the damper blade does not move
The flow rate range for the controller is set in the factory
- q_vmin: Minimum volume flow rate
- q_vmax: Maximum volume flow rate
Operating parameters are set in the factory according to the order code

Operating parameters

q_vmin = 0 – 100% of the nominal volume flow rate q_vnomadjustable
q_vmax = 20 – 100% of the nominal volume flow rate q_vnom adjustable
If necessary for special applications, customers can use setting ranges that are different from the factory settings. Be sure to see the Siemens basic documentation for GLB181.1E/KN for information

Operating modes

Variable operation (V): The setpoint defaults at the KNX digital bus interface
Constant value operation: A constant setpoint defaults or can be entered

System environments

Building automation with Siemens peripheral bus PL-link (Desigo Total Room Automation)
Building automation with KNX LTE-mode (Siemens Synco 700 from product type C)
Building automation with KNX S-mode (third-party integration and free programming)
Support for ETS device profiles v1.x and v2.x

Parts and characteristics

Transducer for dynamic measurements
Overload protection
Release button to allow for manual operation
2 connecting cables (supply voltage, communication) with 2 wires each
Service interface for service tools
Status LED for supply voltage and errors
Push-button for starting test functions and activating the programming mode
Removable address sticker with unique KNX ID (both alphanumeric and as a barcode)
The KNX-certified Compact controller can be used with all KNX devices suitable for the desired application, provided that the required data points are available

{1902}

{1907}

{1908}

Operating parameters

q_vmin = 0 – 100% of the nominal volume flow rate q_vnomadjustable
q_vmax = 20 – 100% of the nominal volume flow rate q_vnom adjustable
If necessary for special applications, customers can use setting ranges that are different from the factory settings. Be sure to see the Siemens basic documentation for GLB181.1E/KN for information

Information technique

Function, Specification text, Order code

Principle of operation

① Differential pressure transducer

② Actuator

③ Volume flow controller

④ Setpoint via KNX communication interface

VAV terminal units control the volume flow in a closed loop, i.e. measurement – comparison – correction. For volume flow rate measurement the effective pressure is measured first. This is done via a differential pressure sensor. The integral differential pressure transducer transforms the effective pressure into a voltage signal. The volume flow rate actual value is available as a network data point. The factory setting is such that 100% correspond to the nominal volume flow rate (q_vnom). The volume flow rate setpoint value comes from a higher-level controller (e.g. room temperature controller, air quality controller, central BMS). Variable volume flow control results in a value between q_vmin and q_vmax. It is possible to override the room temperature control, e.g. by a complete shut-off of the duct. The controller compares the differential pressure setpoint value to the actual value and controls the actuator accordingly if there is a difference.

Category

Compact controller for volume flow rate

Control strategy

The volume flow controller works independent of the duct pressure
Differential pressure fluctuations do not result in permanent volume flow rate changes
To prevent the control from becoming unstable, a dead band is allowed within which the damper blade does not move
The flow rate range for the controller is set in the factory
- q_vmin: Minimum volume flow rate
- q_vmax: Maximum volume flow rate
Operating parameters are set in the factory according to the order code

Interface

Digital bus communication with KNX
KNX-TP, galvanically isolated
Communication interface KNX (S-mode and LTE-mode)
Communication interface KNX PL-link (Siemens peripheral bus)
Group objects for setpoint value default setting, override control, volume flow rate actual value, damper blade position and status

Commissioning

As the operating values are factory set, the terminal units have to be installed at the specified locations
Commissioning requires basic knowledge on how to use the required project planning and commissioning tools

TVR

–

100

LK0

qvmin

–

qvmax

m³/h

1 Type

TVR VAV terminal unit

2 Acoustic cladding
No entry: none
D With acoustic cladding

3 Material
Galvanised sheet steel (Standard construction)
P1 Powder-coated RAL 7001, silver grey
A2 Stainless steel construction

5 Nominal size [mm]
100, 125, 160, 200, 250, 315, 400

6 Accessories
No entry: none
D2 Double lip seal both ends
G2 Matching flanges for both ends

7 Attachments (control components)
LK0 Compact controller, dynamic transducer, KNX interface

8 Operating mode
V Variable (setpoint value range)

10 Operating values for factory setting
Volume flow rates in m³/h or l/s
q_vmin
q_vmax

11 Volume flow rate unit
m³/hl/s

Order example: TVT/200×100/D2/LK0/V/200-800 m³/h

Acoustic cladding	None
Material	Galvanised sheet steel
Nominal size	200 × 100 mm
Accessories	Double lip seal both ends
Attachment	Compact controller, dynamic transducer, KNX interface
Operating mode	V variable operation
Volume flow rate	200 – 800 m³/h

Variants

Compact controller GLB181.1E/KN

① Rotation stop

② Clamping device

③ Position indicator

④ Indicator light

⑤ Push button

⑥ Service socket

⑦ Gear release button (side)

⑧ Connections for differential pressure sensor

⑨ Connecting cable

Technical data, Product details

Connecting cable core identification Siemens GLB 181.1E/KN

1: RD, G, ⊥, -: Supply voltage AC 24 V
2: BK, G0, ⊥: Earth, neutral

1: RD, CE+: Bus connection (KNX PL-link)
2: BK, CE-: Bus connection (KNX PL-link)

<strong>Compact controller GLB181.1E/KN</strong>

Compact controllers for VAV terminal units

VAV terminal units	Type of installation component	Part number
TVR, TVJ, TVT, TZ-Silenzio, TVZ, TVA	GLB181.1E/KN	A00000043586
TVM	2 × GLB181.1E/KN	A00000043586

Measurement principle/installation orientation	Dynamic measurements, any installation orientation
Supply voltage/frequency	24 V AC ± 20%, 50/60 Hz SELV (Safety Extra Low Voltage) or PELV (Protective Extra Low Voltage)
Functional range	19.2 V – 28.8 V AC
Power consumption – when running	3 VA / 2.5 W
Power consumption – when idle	1 VA / 0.5 W
Torque	10 Nm
Run time for 90°	125 s (60 Hz) – 150 s (50 Hz)
Bus interface	KNX, TP1-256 (electrically insulated), current consumption of the bus: 5 mA
Addressing	For example, assignment of physical addresses to the unique KNX IDs on the compact controllers (by others, using commissioning tools)
Setpoint / actual value interface	with KNX group objects
Connections (supply voltage/communication)	2 connecting cables supply/communication separated each approx. 0.9 m, with 2 wires 2 × 0.75 mm²
IEC/EN protection class	III (protective extra-low voltage)
Protection level	IP 54
EMC	EMC to 2014/30/EU
Weight	0.6 kg

Product details

Bus mode

The customer's bus network has to be commissioned in order to ensure smooth data exchange
See the sections on Commissioning and Project design and commissioning tools

Setpoint value default setting

The setpoint value defaults as a percentage value via KNX group objects
The percentage value refers to the volume flow rate range specified by q_vmin – q_vmax .
If q_vmin= 0 and q_vmax= q_vnom are set, the entire flow rate range of the VAV terminal unit is available to the building automation system. The volume flow rate range that can be controlled depends on the VAV terminal unit type.
Volume flow rate range q_vmin– q_vmaxis set in the factory according to the order code
Subsequent adjustment of q_vmin or q_vmaxis possible using service tool AST20 or the customer's network
If just one constant setpoint value is used, the Compact controller works as a constant volume flow controller

Actual value as feedback for monitoring or tracking control

The volume flow rate actual value is available in m³/h and as a percentage value at the bus connection. The 0 – 100 % range corresponds to the flow rate range 0 – q_vnom
In addition to the flow rate actual value, the actual damper blade position can be read using an additional data point

Override control

For special operating situations, the volume flow controller can be put in a special operating mode (override control)
. The following modes are available: damper blade OPEN or damper blade CLOSED.
This can be activated by setting specific values:

For OPEN position: q_vmax= 100 % and setpoint value = 100 %
For CLOSED position: q_vmin < 0 % and setpoint value = 100 %

Override control for diagnosis
This can be activated using the bus system, AST20 or PC software.

Commissioning
Configuration of the communication interface is required. For this purpose, the controller carries a removable address sticker with the unique KNX ID (both alphanumeric and as a barcode). Commissioning requires basic knowledge on how to use the required project planning and commissioning tools More communication parameters may have to be set.

Project design and commissioning tool

Interface mode	Project design and commissioning tool
KNX S-mode	KNX Association ETS4, ETS5,
KNX LTE-mode	Siemens Synco ACS790
Siemens peripheral bus PL-link	Siemens Desigo ABT, SSA

Supplementary manufacturer documentation

Data sheet (N3547) VAV compact controller KNX PL-link
For additional, detailed information about this control component see the Siemens HIT portal. See https://hit.sbt.siemens.com/ – search for GLB181.E/KN
Detailed technical information P3547 on the controller
Installation manual M3547

Téléchargements

Information produit

Impression du site LK0 - Débit vol. SIEMENS GLB / KNX
Product data sheet control components LK0

LK0_PD_2022_02_01_DE_en Product data sheet 420 ko pdf

Certificats

Konformitätserklärung / Declaration of conformity Siemens_GLB181.1EKN

CE_Siemens_GLB181.1EKN--1- Certificate 2,1 Mo pdf

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