Four-port Passive Balun For multiple cameras, you will multiple pairs of baluns for each camera. However, you can save space by using a single 4-port video balun on the monitor side, which supports multiple baluns on the camera side (see below).

One balun per Camera but a single "multi-port" balun for Monitor side A single four-port video balun on the monitor end supplies power to (4) cameras, and receives video from the 4 cameras. One balun per camera is needed on the camera end. Four-port Baluns Connector type Input power Camera-side compatible balun units NVA-300-4POWER RJ45 Bare Wire AC or DC (either will be passed through). NVA-P-201 DC or AC input 18-24V. Connectors: bare wire NVA-870-BS78-PW DC input 18V. Connectors: RJ-45 jack

One pair per camera The other way is to use pairs of video baluns, one (left) for the camera, and one balun (right) for the monitor. For more cameras, add additional pairs as needed. These products will all feed 12V DC to the camera itself. Standalone Balun Pairs Balun pair Connector type Input power NVA-P-201 <- camera side NVA-P-201-ADA <- monitor side Bare wire (pictured) AC and DC, 18-24V NVA-870-BS78-SP <- camera side NVA-870-BS78-PW <- monitor side RJ45 DC only, 18V

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All products, w/matching power adaptors
Image	Product	Power adapter
	NVA-870-BS78-SP NVA-870-BS78-PW (1 power adapter per pair)	DC PIPS-1823 (DC 18V, 2.3 A)
	NVA-P-201 NVA-P-201-ADA (1 power adapter per pair)	DC PIPS-1823 (DC 18V, 2.3 A) AC PIAD-2410 (AC 24V, 10 VA) PIAD-2420 (AC 24V, 20 VA) PIAD-2440 (AC 24V, 40 VA) Cable for AC adapter to balun power plug: VB870-DC-N-36 (3ft) VB870-DC-N-72 (6ft)
	NVA-300-4POWER	The NVA-300 will pass through whatever power (AC or DC) without conversion to the camera-end balun. If using DC on the remote end (with power regulation 1) PIPS-1823 (DC 18V, 2.3 A) If using AC on the other end PIAD-2410 (AC 24V, 10 VA) PIAD-2420 (AC 24V, 20 VA) PIAD-2440 (AC 24V, 40 VA) Cable for AC adapter to balun power plug: VB870-DC-N-36 (3 ft) VB870-DC-N-72 (6 ft)

Notes:
The NVA-300 will pass through whatever power it gets; for short distances (where power level stays constant) the power level should be matched to the camera-side balun, or else the camera's balun must downregulate the power to the camera's power level.