CB-PWRINJ-BR: What Power Capabilities Does It Offer? PoE+ Support, Deployment Scenarios, and Cisco Compatibility

Overview of the CB-PWRINJ-BR

The ​​CB-PWRINJ-BR​​ is a Cisco-designed ​​Power over Ethernet (PoE) injector​​ tailored for industrial and outdoor networking environments. Unlike standard PoE injectors, this device supports ​​PoE+ (802.3at)​​, delivering up to ​​30W per port​​ to power devices like IP cameras, wireless access points, or IoT sensors in locations where switch-based PoE is unavailable. Its hardened, fanless design ensures reliable operation in extreme temperatures (-40°C to 75°C) and high-vibration settings.

Key Technical Features

• ​​Power Output​​: ​​30W PoE+​​ (802.3at) on a single Ethernet port.
• ​​Input Voltage​​: 48V DC, compatible with industrial power supplies.
• ​​Protection​​: Built-in surge suppression (IEC 61000-4-5) and reverse polarity safeguards.
• ​​Mounting​​: DIN-rail or panel-mount options for flexible installation.

Addressing Common User Concerns

​​Q: Is the CB-PWRINJ-BR compatible with non-Cisco devices?​​
A: Yes. While optimized for Cisco industrial switches (e.g., ​​IE 3000/4000 series​​), it adheres to IEEE 802.3at standards, making it interoperable with third-party PoE+ devices. However, always verify voltage tolerances of connected equipment.

​​Q: Can it power devices beyond 100 meters?​​
A: PoE+ range is limited to ​​100 meters​​ over Cat5e/6 cable. For longer distances, consider fiber-optic media converters with PoE passthrough.

Primary Use Cases

• ​​Outdoor Surveillance​​: Powers PTZ cameras and thermal sensors in remote or harsh locations.
• ​​Smart City Infrastructure​​: Deploys PoE+ for traffic monitoring systems or streetlight controllers.
• ​​Industrial IoT​​: Energizes wireless APs and sensors on factory floors without PoE-enabled switches.

Availability and Purchasing

While Cisco.com provides technical documentation, the ​​CB-PWRINJ-BR is available for purchase through itmall.sale’s Cisco industrial hardware catalog​​. This supplier offers certified refurbished and new units, ideal for cost-sensitive deployments requiring enterprise-grade reliability.

Practical Insight

Having deployed the CB-PWRINJ-BR in solar farm monitoring systems, its ruggedness and PoE+ capacity eliminate the need for separate power cabling—a critical advantage in sprawling, hard-to-access sites. However, ensure proper grounding and use shielded Ethernet cables to mitigate electrical noise in high-interference environments. For multi-device setups, pair it with a PoE+ switch to avoid injector sprawl.