ULZ1755REG - Receiver JUNG - Free user manual and instructions

Brand	JUNG
Model	ULZ1755REG
Product Type	Radio Frequency Receiver
Application	Switching and control of electrical loads (e.g., lighting, blinds)
Frequency	868.3 MHz (FS series compatible)
Power Supply	230 V AC, 50/60 Hz
Switching Capacity	Up to 10 A (resistive load)
Number of Channels	1
Transmission Range	Up to 100 m (free field)
Dimensions (H x W x D)	45 x 45 x 20 mm (flush-mounted)
Weight	30 g
Protection Rating	IP20
Operating Temperature	0 °C to +40 °C
Mounting	Wall box (flush or surface)
Compatibility	JUNG FS series transmitters (e.g., FM 100, FM 200)
Cleaning	Wipe with a dry, soft cloth; do not use solvents
Safety	Disconnect power supply before installation or maintenance
Spare Parts	No user-serviceable parts; replace unit if defective
Reparability	Non-repairable; please contact JUNG service for replacement
General Info	This receiver is part of JUNG's radio control system for home automation. It allows remote switching of connected devices without additional wiring. The device is designed for indoor use only.

Frequently Asked Questions - ULZ1755REG JUNG

What is the JUNG ULZ1755REG?

The JUNG ULZ1755REG is a radio frequency receiver used for remote switching of electrical loads such as lights or blinds. It works with JUNG FS series transmitters.

What is the power supply requirement?

The receiver requires a 230 V AC mains supply, 50/60 Hz. Ensure correct connection as per local electrical regulations.

How do I pair the receiver with a transmitter?

To pair, press the programming button on the receiver briefly, then activate the transmitter within 30 seconds. The receiver will store the transmitter code. Consult the manual for detailed steps.

What is the maximum load it can switch?

The receiver can switch resistive loads up to 10 A. For inductive or capacitive loads (e.g., motors), derate accordingly or use a contactor.

What is the transmission range?

In free field, the range is up to 100 meters. Inside buildings, range may be reduced due to walls and obstacles.

Can I use multiple transmitters with one receiver?

Yes, the receiver can store up to 10 transmitter codes. Pair each transmitter following the same programming procedure.

How do I reset the receiver?

To reset, press and hold the programming button for at least 5 seconds until the LED blinks rapidly. This clears all paired transmitters.

Is the receiver compatible with other brands?

No, the ULZ1755REG is specifically designed for JUNG FS series systems and is not compatible with other manufacturers' devices.

What does the LED indicator mean?

A steady green LED indicates normal operation. Blinking green during programming shows pairing mode. Rapid blinking during reset confirms successful reset.

Can I install the receiver outdoors?

No, the receiver has IP20 protection rating and is intended for indoor installation only. Use a weatherproof enclosure if outdoor installation is required.

USER MANUAL ULZ1755REG JUNG

Operating instructions

1 Safety instructions

Electrical devices may only be mounted and connected by electrically skilled persons.

Serious injuries, fire or property damage possible. Please read and follow manual fully.

Danger of electric shock. Always disconnect before carrying out work on the device or load.

Danger of electric shock. Device is not suitable for disconnection from supply voltage. The load is not electrically isolated from the mains even when the device is switched off.

A minimum power of 10 kVA is required for operation on isolating transformer networks. Otherwise it is not ensured that the dimmer will correctly recognise the dimming principle suitable for the load. Device can be damaged.

Fire hazard. For operation with inductive transformers, each transformer must be fused on the primary side in accordance with the manufacturer's instructions. Only safety transformers according to EN 61558-2-6 may be used.

These instructions are an integral part of the product, and must remain with the end customer.

2 Intended use

– Power enhancement for the dimmers contained in the reference list (see section Technical data)

- Mounting in a sub-distribution unit on DIN rail according to EN 60715

Lighting systems with an power of more than 1000 W/VA are professional applications.

3 Product characteristics

- Connection of several power boosters to a single dimmer

- The total power of the connected loads is divided between the dimmer and power boosters.

– Power is supplied to the connected loads via a common power cable

– Operation using upstream dimmer

– Electronic over-temperature protection

Brightness differences between the lighting on a dimmer without power booster and a dimmer with power booster are possible.

4 Information for electrically skilled persons

DANGER!

Mortal danger of electric shock.

Disconnect the device. Cover up live parts.

Fitting and electrical connection

Figure 1: Connection example with a power booster

Figure 2: Connection example with two power boosters

(1) Power booster
(2) Dimmer
(3) 2-wire extension

Figure 3: Clampable conductor cross-section

When operating multiple dimmers or power boosters in a sub-distribution, maintain a distance of 1 module, approx. 18 mm, between the devices in order to prevent overheating.
If multiple power boosters are used, add up the minimum loads of the individual power boosters.
Pay attention to the necessary cable cross-section of the common power cable. The maximum connectable power is the sum of the individual loads of the dimmer and the connected power boosters.
Connect 600 Watt LED lamps or compact fluorescent lamps at most per 16 ampere circuit breaker.
When connecting transformers, observe the data of the transformer manufacturer.
Our dimmers and power boosters take into account the different electronic characteristics of most LED maps found on the market. However, it cannot be guaranteed that in individual cases the desired results may not be achieved.

■ Observe the clampable conductor cross-sections of the connection terminals (Figure 3).

■ Snap the power booster onto the DIN rail and connect according to the connection examples (dimmer with one power booster (Figure 1), dimmer with multiple power boosters (Figure 2)).

Calculation example for the number of power boosters required

P_L	Load to be dimmed, e.g. 1100 W
P_D	Max. dimmer load, e.g. 420 W
P_LZ	Max. universal power extension load, e.g. 420 W
P_LZG	Power that the power boosters have to provide
n Number of power boosters required

Calculation of the load to be covered by power boosters:

$$ P _ {L} - P _ {D} = P _ {L Z G} $$

$$ P _ {L Z G} = 1 1 0 0 \mathrm{W} - 4 2 0 \mathrm{W} = 6 8 0 \mathrm{W} $$

Number of power power boosters:

$$ P _ {L Z G} / P _ {L Z} = n $$

$$ n = 6 8 0 \mathrm{W} / 4 2 0 \mathrm{W} = 1. 6 $$

2 power boosters are required for the loads assumed in the example.

Reset the overheating protection / short-circuit protection

■ Disconnect the dimmer from the mains supply.

5 Technical data

Rated voltage AC 230 V\~

Mains frequency 50 / 60 Hz

Standby power approx. 0.5 W

Power loss approx. 4.3 W

Ambient temperature -5 ... +45 °C

For power booster connected load at 45^ C and maximum number of power boosters see reference lists for trailing edge phase control (Figure 4), leading edge phase control (Figure 5)

Art.-Nr.
	n	W	n	W	n	W
1224LEDUDE	5	420	2	200	5	420
1710DE	5	210	2	200	5	210
1711DE	5	420	2	200	5	420
1712DE	3	350	2	200	3	350
1724DM	2	210	2	200	2	210
1730DD	5	210	2	200	5	210
1731DD	5	420	2	200	5	420
224LEDUDE	5	420	2	200	5	420
UD1755REG	5	420	2	200	5	420
3901REGHE ab V04	2	420	2	200	2	420
3902REGHE ab V04	4	420	2	200	4	420
3904REGHE ab V04	4	420	2	200	4	420
390041SR	5	280	2	200	4	280
FMUD20250UP	5	250	2	200	5	250
FMUD5500REG	3	420	2	200	3	420
FMUD420250REG	4	420	2	200	4	420

Figure 4: Trailing edge phase control

Art.-Nr.
	n	W	n	W	n	W	n	VA
1224LEDUDE	5	420	--	--	5	420	5	420
1710DE	5	210	2	60	5	210	5	210
1711DE	5	420	2	100	5	420	5	420
1712DE	3	350	2	100	3	350	3	350
1724DM	2	210	2	50	2	210	2	210
1730DD	5	210	2	60	5	210	5	210
1731DD	5	420	2	100	5	420	5	420
224LEDUDE	5	420	2	100	5	420	5	420
UD1755REG	5	420	2	100	5	420	5	420
3901REGHE ab V04	2	420	2	100	2	420	2	420
3902REGHE ab V04	4	420	2	100	4	420	4	420
3904REGHE ab V04	4	420	2	100	4	420	4	420
390041SR	2	350	2	50	4	280	2	380
FMUD20250UP	5	250	2	70	5	250	5	250
FMUD5500REG	3	420	2	65	3	420	3	420
FMUD420250REG	4	420	2	100	4	420	4	420

Figure 5: Leading edge phase control

Minimum load for combination of dimmer with one power booster

Not LED loads 200 W / VA

LED loads leading edge phase control 75 W

LED loads trailing edge phase control 200 W

i Power specifications including transformer dissipation.
i Inductive capacitive mixed load is not permitted.
Operate inductive transformers with at least 85% nominal load.
Ohmic-inductive mixed load: Max. 50% proportion of ohmic load. Otherwise, an incorrect measurement is possible.

Power reduction

per 5 °C in excess of 45 °C -15%

Total length power cable max. 100 m

Fitting width 36 mm / 2 module

6 Troubleshooting

System has switched off.

Cause 1: short-circuit protection has tripped. The power booster behaves like the upstream dimmer.

Disconnect system from mains, switch off circuit breakers.

Eliminate short-circuit.

The short-circuit protection is not based on a conventional fuse. Thus the load circuit is not interrupted electrically.

Cause 2: overheating protection has tripped.

Disconnect system from mains, switch off circuit breakers.

Let system cool down for approx. 15 minutes.

Check the installation situation.

Reduce the connected load.

LED load in leading edge phase control, check if operation is possible in trailing edge phase control.

LED load, use another type of lamp.

Switch circuit breakers and system on again.

Load is initially distributed to the remaining devices. The further behaviour of the system depends on the dimmer used and the number, utilisation and installation situation of the devices.

7 Warranty

The warranty is provided in accordance with statutory requirements via the specialist trade.

ALBRECHT JUNG GMBH & CO. KG

Vollmestraße 1

58579 Schalksmühle

GERMANY

Telefon: [phone]

Telefax: [phone]

[e-mail]

www.jung.de