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Crestron ZUMLINK-JBOX-20A High Inrush Switch J-Box Load Controller

Crestron part number ZUMLINK-JBOX-20A-SW

The Crestron ZUMLINK-JBOX-20A-SW is a Zūm wired load controller that mounts on a junction box and switches high inrush lighting loads of up to 20A at 100-277V using zero cross switching. It works with Zūm keypads and sensors over Zūm Link as part of a Zūm wired room system.

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Installation and programming

Need it installed? Our Crestron certified engineers install, set up and programme everything we supply. A 4 hour visit is €440 and a full day €880, plus VAT.

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Crestron ZUMLINK-JBOX-20A Zūm Wired J-Box Load Controller, High Inrush Switch, 20A, 100-277V with Link Communication

About the Crestron ZUMLINK-JBOX-20A

The controller is rated 20A at 100-277VAC, 50/60 Hz, with zero cross switching for high inrush loads, and 0.5 HP at 120-277VAC. It can switch LED, electronic ballasts, incandescent, magnetic and electronic low-voltage, neon/cold cathode and high-intensity discharge lighting. This model switches only; for 0-10V dimming the range includes the ZUMLINK-JBOX-16A-LV, and for plug loads the ZUMLINK-JBOX-20A-PLUG.

Two RJ-45 Zūm Link ports daisy-chain it with the other Zūm wired devices in the room, and it provides 85mA of power for Zūm Link devices, including ZUMLINK-KP keypads. Spring clamp terminals accept an occupancy sensor, a photo sensor and an override input, which is how daylighting, occupancy or vacancy sensing are added. A TEST button with a green LED toggles the load, and a bi-colour status LED shows green in normal operation and red on a fault.

Line, neutral and power monitoring connections are 14 AWG flying leads in black, white and red. The white plastic housing is UL 94 5VA flame rated and mounts to the side of a standard 4 in. square junction box through a 1/2 in. conduit knockout, meeting the requirements of UL 2043. It measures 123 x 108 x 52 mm and weighs 199 g (7 oz). It is sold as part number ZUMLINK-JBOX-20A-SW.

Key features

  • Zero cross switching of 20A high inrush lighting loads
  • 100-277VAC, 50/60 Hz; 0.5 HP at 120-277VAC
  • Switches LED, ballast, incandescent, low-voltage, neon/cold cathode and high-intensity discharge loads
  • Two Zūm Link RJ-45 ports for in-room daisy-chaining
  • 85mA of power for Zūm Link devices such as ZUMLINK-KP keypads
  • Occupancy, photo sensor and override inputs
  • Flying lead wiring and knockout mount to a 4 in. square junction box

ZUMLINK-JBOX-20A specifications

Load rating20A at 100-277VAC, 50/60 Hz, high inrush, zero-cross switching; 0.5 HP at 120-277VAC
Switch load typesLED, electronic ballasts, incandescent, magnetic low-voltage, electronic low-voltage, neon/cold cathode, high-intensity discharge
Zūm Link(2) RJ-45 ports for in-room daisy-chaining; 85mA available for Zūm Link devices including ZUMLINK-KP keypads
InputsOccupancy sensor (24V, OCC, GND; 85mA output), photo sensor (24V, PHO, GND), override (OVR, GND); spring clamp, one 20-24 AWG solid wire per terminal
Connections14 AWG flying leads: black line, white neutral, red power monitoring output
Controls and indicatorsTEST button with green LED; bi-colour Zūm Link status LED; 24V, O, D and OVR LEDs
Housing and mountingWhite plastic, UL 94 5VA flame rated; mounts to the side of a 4 in. square junction box via a 1/2 in. conduit knockout; UL 2043
Environmental0° to 40°C (32° to 104°F); 10% to 90% RH non-condensing
DimensionsHeight 123 mm (4.83 in), width 108 mm (4.25 in), depth 52 mm (2.03 in)
Weight199 g (7 oz)

Part numbers on this page

Part numberVersionPriceAdd
ZUMLINK-JBOX-20A-SW High inrush switch On request

Where the ZUMLINK-JBOX-20A is used

  • Switching high inrush LED and fluorescent ballast lighting circuits
  • Commercial rooms using Zūm wired lighting control
  • Adding occupancy, vacancy or daylight control to a switched circuit
  • Mounting on standard 4 in. square junction boxes

Works with the ZUMLINK-JBOX-20A

Crestron installed by 1Install

We supply, install and programme Crestron in homes and businesses across Ireland. These photos are from our own installations. See more in our projects, or budget a whole system with our Quote Builders for homes and meeting rooms.

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Questions about the Crestron ZUMLINK-JBOX-20A

What is the Crestron ZUMLINK-JBOX-20A-SW?

It is a Zūm wired J-Box load controller with a high inrush switch and Zūm Link communication. It mounts on a 4 in. square junction box and uses zero cross switching to control lighting loads of up to 20A at 100-277V, working with Zūm keypads and sensors in the same room.

Can the ZUMLINK-JBOX-20A-SW dim lights?

No, it is a switching controller and has no 0-10V dimming leads; its connections are line, neutral and a power monitoring output. For 0-10V dimming, the ZUMLINK-JBOX-16A-LV adds a 0-10V output alongside 16A switching, and the ZUMLINK-JBOX-20A-PLUG is the 20A version for plug loads.

Which loads can it switch?

It is rated 20A at 100-277VAC, 50/60 Hz, for high inrush loads with zero-cross switching, and 0.5 HP at 120-277VAC. Load types include LED, electronic ballasts, incandescent, magnetic low-voltage, electronic low-voltage, neon/cold cathode and high-intensity discharge lighting.

What connects to the ZUMLINK-JBOX-20A-SW?

Two RJ-45 Zūm Link ports daisy-chain it with other Zūm wired devices, and it supplies 85mA to Zūm Link devices such as ZUMLINK-KP keypads. Spring clamp inputs accept an occupancy sensor, a photo sensor and an override contact, each terminal taking one 20-24 AWG solid wire. Sensors and keypads are sold separately.

How is it mounted and what does it weigh?

The controller fixes to the side of a standard 4 in. square junction box using a 1/2 in. conduit knockout. Its white plastic housing carries a UL 94 5VA flame rating and meets UL 2043 requirements. It measures 123 mm high, 108 mm wide and 52 mm deep, and weighs 199 g (7 oz).

How much is the Crestron ZUMLINK-JBOX-20A?

Crestron asks its dealers to give the price of the ZUMLINK-JBOX-20A directly rather than publish it online. Add it to your quote list and we will send you a written quote, with delivery, and installation and programming if you need them.

Can 1Install supply, install and programme the ZUMLINK-JBOX-20A?

Yes. 1Install is an authorised Crestron Elite Partner with offices in Skerries, Co. Dublin and Cork. We can supply the ZUMLINK-JBOX-20A on its own, or install, set up and programme it as part of your system. Installation visits are €440 for 4 hours or €880 for a full day, plus VAT and travel.

Does the ZUMLINK-JBOX-20A come with a warranty?

Yes. Everything we supply is new, genuine Crestron with Crestron's standard warranty. If the ZUMLINK-JBOX-20A develops a fault, contact us and we will handle the claim with Crestron. If we installed it, our workmanship is guaranteed for the lifetime of the system.

Is the ZUMLINK-JBOX-20A in stock?

We order Crestron for each quote, so availability depends on Crestron's stock at the time. We check it before we quote and put the expected delivery date on your quote, so you know where you stand before you pay.

Can I buy the ZUMLINK-JBOX-20A without installation?

Yes. We supply Crestron to end users, with or without installation. Like most Crestron devices of this type, it needs setting up or programming before it works in a system, and we can quote for that too.

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