LN0

Compact controller GLB181.1E/3

Control components for VAV terminal unit with dynamic transducer

Compact device for use with VAV terminal units

Controller, dynamic effective pressure transducer and actuator in one casing
Use in ventilation and air conditioning systems, only with clean air
Suitable for constant and variable volume flows
Activation of override controls by means of external switch contacts
Volume flow rates q_vmin and q_vmax are are factory set and stored in the controller
Change of operating parameters by means of adjustment device
Service access for the adjustment device and PC configuration software

General information

Application

All-in-one control devices 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
Volume flow rate control is based on setpoint values received from room temperature controller, central BMS, air quality controller or other devices as an analogue signal.
Override controls for activating q_vmin, q_vmax, shut-off or OPEN position can be set with a switch or relay
Volume flow rate actual value is available as linear voltage signal
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 extract air filters upstream, as 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 of a Compact controller with static differential pressure transducer (e.g. XD0) instead of the Compact controller LN0 described here

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_vnomadjustable
If necessary for special applications, customers can use setting ranges that are different from the factory settings. See the Siemens basic documentation for GLB181.1E/KN.

Operating modes

Variable or constant value
Variable operation (V)
The setpoint value is set via the analogue interface, the signal voltage range corresponds to q_vmin to q_vmax
Constant value mode (F)
A setpoint signal is not required, setpoint value corresponds to q_vmin

Interface

Analogue interface with adjustable signal voltage range

Analogue signal for volume flow rate setpoint value
Analogue signal for volume flow rate actual value (factory setting),
alternatively: analogue signal for damper blade position (adjustment by others required)

Signal voltage range

0 – 10 V DC
2 – 10 V DC

Parts and characteristics

Transducer for dynamic measurements
Actuators with overload protection
Release button to allow for manual operation
Status LED for supply voltage and errors
Connecting cable with 6 wires
Service interface

Constructions

GLB181.1E/3
For TVR, TVJ, TZ-Silenzio, TA-Silenzio, TVZ, TVA
For TVT up to size 1000 × 300 or 800 × 400
GLB181.1E/3 (2 units)
For TVM

Useful additions

AT-VAV-S: Adjustment device AST20

Technical information

Function, Specification text, Order code, Variants

Principle of operation

① Differential pressure transducer

② Actuator

③ Volume flow controller

④ Setpoint value signal

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 hence available as a voltage signal. The factory setting is such that 10 V DC always corresponds to the nominal 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 volume flow rate setpoint value to the actual value and controls the integral actuator accordingly.

Category

Compact controller for volume flow rate control

Application

Control of a constant or variable volume flow rate setpoint
Electronic controller for applying a reference value and capturing an actual value signal
The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
Stand-alone operation or integration with a central BMS

Area of application

Dynamic transducer for clean air in ventilation and air conditioning systems

Actuator

Integral; slow-running (run time 150 s or less for 90°)

Installation orientation

Either direction

Connection

Connecting cable with 6 wires

Supply voltage

24 V AC

Interface/signalling

Analogue signal 0 - 10 V DC or 2 - 10 V DC

Interface information

Analogue: volume flow rate setpoint value and actual value signal
Flow rate actual value: factory set;
Actual value signal can be reconfigured to the damper blade position by others

Special functions

Activation of CLOSE, q_vmin, q_vmax, OPEN by means of external switch contacts

Parameter setting

Parameters specific to the VAV terminal unit are factory set
Operating values q_vmin, q_vmax are factory set
Signal characteristic is factory set

Subsequent adjustment using optional tools:

Adjustment device, PC software (wired in each case)

Factory condition

Electronic controller is factory mounted on the control unit
Factory-set parameters
Functional test with air (see sticker)

TVR
TVR	D	100	D2	LN0	V	0	–	m³/h
\|	\|	\|	\|	\|	\|	\|	\|	\|
1	2	5	6	7	8	9	10	11

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)
LN0 Compact controller with dynamic transducer

8 Operating mode
F Constant value
V Variable (setpoint value range)

9 Signal voltage range
0 0 - 10 V DC
2 2 - 10 V DC

10 Operating values for factory setting
Volume flow rates in m³/h or l/s
q_vconst  (only with operating mode F)
q_vmin  (only with operating mode V)
q_vmax  (only with operating mode V)

11 Volume flow rate unit
m³/h
l/s

Order example: TVT/200×100/D2/LN0/V0/200-800 m³/h

Acoustic cladding	None
Material	galvanised sheet steel
Nominal size	200 × 100 mm
Accessories	Double lip seal both ends
Attachment	Compact controller with dynamic transducer,
Operating mode	V variable operation
Signal voltage range	0 - 10 V DC
Volume flow rate	200 – 800 m³/h

Compact controller LN0

1: Rotation stop
2: Clamping device
3: Damper blade position indicator
4: VAV Compact controller
5: Status LED
6: Service socket
7: Connecting cable

Product details, Technical data

Product details

Analogue interface 0 – 10 V or 2 – 10 V DC (operating mode V, F)

The analogue interface can be set for signal voltage range 0 – 10 V DC or 2 – 10 V DC. The assignment of
the volume flow rate setpoint value or actual value to a voltage signal is shown in the characteristic curves.
▪   The set signal voltage range applies to both setpoint value and actual value signals
▪   The signal voltage range is set in the factory according to the order code
▪   The signal voltage range can be adjusted with an adjustment device (by others).

Setpoint value setting
▪   With operating mode V (variable operation), the setpoint comes from an analogue signal on terminal YC
▪   The selected signal voltage range 0 – 10V or 2 – 10V DC is assigned to the volume flow rate range q_vmin – q_vmax .
▪   Volume flow rate range q_vmin – q_vmax is set in the factory according to the order code
▪   Subsequent adjustment of q_vmin or q_vmax is possible with an adjustment device

▪   With operating mode F (constant value mode), an analogue signal is not required on terminal YC
▪   The set flow rate constant value q_vmin is used
▪   Volume flow rate q_vmin is set in the factory according to the order code
▪   Subsequent adjustment of q_vmin is possible with an adjustment device

Actual value as feedback for monitoring or tracking control
▪ The actual volume flow rate measured by the controller can be captured as a voltage signal at terminal U
▪ The selected signal voltage range 0 – 10 V DC or 2 – 10 V DC is mapped to the volume flow rate range 0 – q_vnom

Override control
For special operating situations, the volume flow controller can be put in a special operating mode (override control).
. The following modes are possible: control q_vmin , control q_vmax , damper blade in the OPEN position or damper blade CLOSED.

Override control using signal inputs Y1 and Y2
With appropriate wiring on signal inputs Y1 and Y2, the override controls can be activated according to the connection diagrams via wiring with external switch contacts/relays.
Override control CLOSE using control signal on YC
For signal voltage ranges 0 – 10 V and 2 - 10 V DC: CLOSED is activated if q_vmin = 0 and the control signal on YC = 0 V DC.

Status indicator

Status LED	Meaning
Dark	No supply voltage
Green	Normal operation
Red, blinking	Connection tubes of the differential pressure sensor have been mixed up
Red	Pressure sensor fault

Supplementary manufacturer documentation

Siemens VAV compact controller G.B181.1E/3

For additional, detailed information about this control component see the Siemens HIT portal.

http:\www.hit.sbt.siemens.com
Find GLB181.1E/3
Data sheet N3544
Detailed technical information P3544 on the controller
Installation manual M3544

Control strategy

Volumenstromregler arbeitet kanaldruckunabhängig
Druckschwankungen bewirken keine bleibenden Volumenstromabweichungen
Eine Totzone (Hysterese), innerhalb der die Stellklappe nicht bewegt wird, sorgt für stabile Regelung
Volumenstrombereich werkseitig im Regler parametriert

q_vmin: minimaler Volumenstrom
q_vmax: maximaler Volumenstrom

Betriebsparameter werden per Bestellschlüssel festgelegt und werkseitig parametriert

Operating parameters

q_vmin= 0 - 100 % vom Nennvolumenstrom q_vnenneinstellbar
q_vmax= 20 - 100 % vom Nennvolumenstrom q_vnenneinstellbar
Für spezielle Anwendungen können bauseits von den Werkseinstellungen abweichende Einstellbereiche genutzt werden. Hierzu ist die Siemens Basisdokumentation des GLB181.1E/KN zu konsultieren.

Compact controllers for VAV terminal units

VAV terminal units	Type of installation component	Part number
TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio, TVZ, TVA	GLB181.1E/3	M466EG7
TVM	GLB181.1E/3	M466EG7

Type of measurement/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)
Setpoint value signal input	0 - 10 V DC, input resistance > 100 kΩ
Actual value signal output	0 – 10 V DC, max. 1 mA
Connections	Connecting cable approx. 0.9 m, 6 x 0.75 mm²
IEC protection class	III (Protective extra-low voltage)
Protection level	IP 54
EC conformity	EMC to 2014/30/EU
Weight	0.6 kg

Downloads

product information

Product data sheet LN0

LN0_PD_2022_01_24_DE_en product data sheet 18 MB pdf

certificates

Konformitätserklärung / Declaration of conformity CE_Siemens_GLB181.1E3

CE_Siemens_GLB181.1E3 Certificate 2,1 MB pdf

By clicking the button, you allow us to provide you with an excellent website experience and easy shopping processes. These cookies include ones that are necessary for the operation of the site and for the control of our services and applications, as well as ones that are used solely for statistical purposes, for convenience settings or to display personalized content. You can decide which categories you want to allow and you can adjust the data utilisation settings based on your individual requirements. Please note that, depending on the settings that you have selected, all functionalities of the page might not be available. You can change your selection at any time.

TECHNICALLY NECESSARY

These cookies are necessary for the proper functioning of our website and cannot be disabled. As a rule, these cookies are set only in response to actions taken by you, such as setting your privacy preferences or filling the shopping cart. In addition, security-relevant functionalities or support via a dedicated webchat are integrated, including all session cookies from TROX set after you log in as a customer. You can set your browser to block these cookies or notify you about them. As a result, however, some areas of the website might not function as intended.

STATISTICS AND WEBSITE ANALYSIS

These cookies make it possible to collect data for statistics and analysis so that TROX can measure the performance of the websites visited, identify technical problems and find starting points for optimisation. They may be set by us or by third parties whose services we use on our sites. Users also help to identify, for example, which pages are used most frequently or only rarely or how people navigate between web pages. All information used by third parties is aggregated and anonymised.