Crestron CSA-PWS2S-JBOX-ZUMLINK-CN – Dual-Motor J-Box Power Supply for Motorized Shading

Product Overview

The Crestron CSA-PWS2S-JBOX-ZUMLINK-CN is a plenum-rated, dual-output 24VDC power supply designed for J-box mounting in Crestron motorized shading installations. It powers up to two motorized roller shade or drapery motors simultaneously, delivering up to 100W total (50W per motor output) with individual overcurrent and miswire protection on each channel. The unit supports Cresnet and Zumlink network communications for integration with Crestron Zumlink and 4-Series control platforms.

Product Description

The CSA-PWS2S-JBOX-ZUMLINK-CN is hardwired into a standard 4 in. x 4 in. electrical junction box using Class 1 flying leads, making it suitable for installation in ceiling plenums and above-tile ceiling spaces where UL 2043 compliance is required. Each shade output is an independent 4-pin 5 mm terminal block rated at 2.1A (50W) continuous per motor, with per-channel overcurrent protection to protect both the motor and the power supply. Zumlink RJ-45 ports provide network connectivity for Crestron Zumlink shade control, while dual Cresnet terminal blocks support legacy Cresnet-based shade topologies.

Miswire protection prevents damage from incorrect field wiring, which reduces commissioning risk in large installations. The anodized black metal housing carries a UL 2043 rating for plenum installation, allowing the unit to be installed in the air-handling space above a suspended ceiling without conduit. At 22 oz (635 g), the unit is light enough for single-person overhead installation.

Key Features

• Dual 24VDC shade motor outputs, 50W (2.1A) per output, 100W total capacity
• Per-channel overcurrent protection and miswire protection on all outputs
• Zumlink communications: (2) RJ-45 ports for Crestron Zumlink network
• Cresnet communications: (2) 4-pin 3.5 mm terminal blocks for legacy Cresnet control
• Class 1 hardwired AC input (100-240VAC, 50-60 Hz) via flying leads for J-box installation
• UL 2043 rated for environmental air-handling (plenum) space installation
• Supports up to two roller shade motors, two drapery motors, or a mixed combination
• Anodized black metal housing with ETL Listed certification for US and Canada
• Efficiency >85%, ripple/noise <0.5%

Typical Applications

• Above-ceiling J-box mounting for Crestron motorized roller shade and drapery systems in commercial offices
• Plenum-space power distribution for Zumlink shade networks in open-plan office floor plates
• Conference room and boardroom motorized shade power supply where dual-motor control is required from a single unit
• Retrofit shading installations where ceiling access is available but conduit runs are not practical
• Healthcare and hospitality room darkening shade systems with Crestron automation control

Technical Specifications

Frequently Asked Questions

Does this power supply require a junction box for installation?

Yes. The CSA-PWS2S-JBOX-ZUMLINK-CN is designed specifically for hardwiring into a standard 4 in. x 4 in. electrical junction box. Its Class 1 flying leads connect directly to building AC power. Do not install without a proper junction box and in compliance with local electrical codes.

What is the difference between the Zumlink RJ-45 ports and the Cresnet terminal blocks?

The Zumlink RJ-45 ports are used in Crestron Zumlink shade network topologies where shade motors communicate over a structured Cat cable network. The Cresnet terminal blocks provide backward compatibility with shade motors that use the older Cresnet RS-485 communication protocol. Both protocols can coexist in the same installation.

Can this unit power more than two motors if they are low-draw models?

No. The unit has two physically independent output terminals. Each terminal powers one motor homerun. The two-motor maximum is a hardware constraint, not a power budget limitation.