The CH93 series, part numbers 6420093-( ), is a multi-function digital clock / chronometer / voltmeter / temperature unit with multiple options for USB Charging Ports. The unit fits into a standard, rear-mounted, 2-¼” avionics panel cutout. Power is drawn from the aircraft main bus to light a white, six digit, seven segment LED clock. The clock can display several different modes: local time, universal time, flight timers, elapsed and countdown timers and optionally, bus voltage and up to two temperature inputs. The CH93 display is daylight readable with two methods of brightness control. It can be controlled automatically using the internal photocell or manually with an external dimming bus voltage. The CH93 clock has an internal battery to maintain clock time and flight timer memory when the aircraft is not in use.
The USB Charging Ports are designed as DCPs (Dedicated Charging Ports) to industry-standard protocol per the USB Battery Charging 1.2 Compliance Plan. Some models also comply with the higher power requirements of USB Power Delivery 2.0 and 3.0. Early-generation or smaller consumer electronics typically accept one (1.0) amp during charging. However, newer electronics, such as tablets and larger devices can accept, and in some cases, require up to 3 amps to charge and operate. Unlike most dual USB chargers which provide one (1.0) amp on one port and 2.1 amps on the second port, the CH93 provides 3 amps per port. The Type A High Power (HP) USB ports provide a 5 volt output at 3 amps and the Type C Max Power USB-PD port provides 3 amps at 5, 9, 15, or 20 volts depending on the type and needs of the device. This provides enough power to charge any USB device, including the higher demand products. With features like short circuit protection, over-current protection, low voltage shut-down and temperature monitoring, it handles abnormal conditions safely.