Simplex Impulse Clocks are driven by a compact ratchet drive movement that responds to an electrical impulse sent from the Master Clock each minute. Simplex 2310A/6310A synchronous clocks may be used for service (included) to the 2310A / 6310A replacement clock according to the instructions provided. The clock has a rear-mounted on/off plus a manual setting knob for easy and time setting. life. One AA Alkaline battery can sustain a clock over a year. Simplex 6310-9075A Description. Simplex Impulse Clocks can be used in all types of applications, from small offices to large-scale industrial sites. SimplexView and Download Simplex 6310-9221A quick start manual online. Synchronous Clocks. 6310-9221A clock pdf manual download. Also for: 6310-9226a, 6310-9227a, Synchronize your clocks in a small business or large industrial site with the Simplex (6310-9221A) 12" Clock Sync Wired Round Surface Mount (3WBLK) A time-tested and proven solution, Simplex wired clock systems continue to provide accurate timekeeping at thousands of locations worldwide. AllSync Plus Clock Installation & Operation Manual Simplex® & IBM . 77* Series, 82* Series, 2310 – 92* Series, 6310 – 92* Series. American Time .