Answer:
The SB-ES-3216-2 is designed specifically as an intermediate, multi-lane barrier unit to build multi-lane turnstile arrays, whereas the standard SB-ES-3216 serves single-lane pedestrian access installations.
Within the eSSL pedestrian turnstile lineup, the SB-ES-3216-2 serves as the dedicated multi-lane configuration. In commercial entrance turnstile arrays requiring two or more adjacent lanes, the SB-ES-3216-2 acts as the dual-sided intermediate cabinet dividing adjacent lanes, sharing passage control across both sides. In contrast, the baseline SB-ES-3216 is structured for standalone single-lane applications with single-sided pedestrian flow control.
