This module is at the heart of the system giving customers complete flexibility at purchase but also over time since it is inherently upgradeable. While most carts will use one voltage output, it is possible to add a piggy back PCB to output 2 voltages simultaneously. In high load scenarios extra hot swap modules can be added to a system.
There are up to 4 battery power inputs, which allows the user to attach up to 4 Circadian Mounts/batteries. Batteries come in 3 capacities, 80Wh 160Wh and 200Wh. So the capacity range is 80 -800Wh. The system can handle a 150W continuous load, with higher peak currents possible. The modules main job is to regulate the Hot Swap. A typical recommended cart set up has 2 batteries on cart and two batteries on Charger. At the start of each shift, the nurse should simply change the batteries, swapping one first, and then the second. This way there is never a need for Power down, and the problem of starting the morning shift with flat batteries is resolved.
It is also possible to attach a Power Supply for on Cart charging. We offer an 220W medically approved option. We recommend that default charging is on the wall or desk chargers because it represents a better workflow and avoids nurses plugging-in and leaving cables as a trip hazard in corridors etc, but we know many Hospitals are used to on shift charging, so the option is included and has no limitations. The On-Cart batteries are then no longer removed from the cart, just charged when needed.
The module takes an unregulated voltage - raw battery voltage in the 16.6V to 12V range and converts to a regulated 12V/14V ,19V or 24V, if a version with just 1 Voltage level output is chosen. It is possible to add an extra 12/14, 19 or 24V DC:DC converter later. Other Voltages in the 5-24V range can be requested. Each PCB has two power outputs at the selected voltage - a green monitor socket - 3 pin; and a lockable Switch Kraft barrel connector socket. There are 2 further outputs for communication. First the LCD output which gives remaining run-time information to the nurse in Hours and Minutes adjusted to the actual load. This is by far the easiest way to identify batteries nearing the end of their discharge. If one of the batteries is significantly more empty the display will also identify this. There is also an Audio LCD option, which will beep at preset capacity levels. The second output is a USB. This is to upload battery parameters to the Cart PC or to maintenance staff, it can also download new Firmware for the batteries, LCD display and itself.
The module can be used with or without housing - it should be out of sight. Connection points are plug ins for cables, which allows for quick cart set up and through wiring.