The SR34i is the controller used in SiPass Entro version 5. It comes in four different sizes (4, 8, 16 or 32 doors), which makes it simple to optimize the system. Regardless of the size, up to 16 segment controllers can be used in a single SiPass Entro system.

Interface	Built-in 2-port switches with two RJ45 10/100 Mbit connections for Ethernet. RS232 to PC, printer or modem with a maximum distance of 25 metres. RS485 Global to other SR34i controllers. RS485 Local to door controllers. Expansion slot for memory card CF8 (compact flash).
Operating temperature	0 to +50 °C
Operating voltage	8 to 40 VDC, 8 to 30 VAC
Current consumption	100 mA
Dimensions (WxHxD)	248 x 182 x 66 mm