Honeywell International Inc.

Carrier Corporation

John Boettger

Murali Krishna Bezawada

Bart Meijer

Murali Ravipati

Jayakar Chippada

Krishna Kishore Mendi

Murali Thavva V V

Suresh Babu Dtvs

Tushar N Nisith Shrimankar

Ajit Yadav

Murali Thavva VV

A power conditioning circuit includes at least one power storage device having electrodes coupled for receiving power from a DC power source. At least one active current limit (ACL) circuit coupled to the electrodes of the power storage device is for limiting a maximum power output from the power storage device under fault conditions. A DC-to-DC converter has its inputs coupled to the ACL circuit. At least one crowbar circuit has a first terminal and a second terminal and a shorting device coupled to an output of the DC-to-DC converter for providing output terminals for the power conditioning circuit.

Intrinsically safe power conditioning circuit

An interface device for providing Intrinsic Safety to a Smart Identity Module (SIM) card includes a buffer circuit including a voltage regulator and a voltage level translator including drivers. Baseband processor side pins include at least an input/output (IO) pin for receiving data signals, first SIM reset (RST) pin, core power supply (VCC) pin, a clock (CLK) pin, a battery power supply (VBAT) pin, and SIM side pins include at least a VCC pin, a SIM CLK pin, second SIM RST pin, and a SIM IO pin. There is at least one series resistor (R, R, R, Rand R) in series with each of the baseband processor side pins.

Interface device providing intrinsic safety for a communications device

A packaged cellular modem system includes a capacitor for receiving power from a DC power source, a DC-to-DC converter coupled to capacitor electrodes, a cellular modem coupled to the converter output and to an antenna, and an IS barrier circuit coupled to a modem output. A microcontroller coupled to a boost regulator has its output coupled to electrodes. A metrology jumper is between the microcontroller and ground. An encapsulation material provides a potted area for the capacitor, converter, modem, IS barrier circuit and microcontroller. A SIM card is coupled to the modem by the IS barrier circuit. LED's are coupled to the microcontroller. The SIM card and LEDs are in a non-potted area. A transparent SIM card access cover over the SIM card and LEDs enables exposing the SIM card.

Packaged intrinsic safe industrial modem

A system and method for updating industrial cellular communications devices. A supercapacitor and a cellular modem are connected electronically to one another. A host can communicate bidirectionally and wirelessly with the cellular modem. A microcontroller is connected electronically with the cellular modem, such that the microcontroller facilitates monitoring with the cellular modem of a voltage and temperature associated with the super capacitor. When the voltage of the super capacitor attains a lower voltage limit, the cellular modem stops receiving data from the host and sends a status code to the host and disconnects a data call and data transfer and enters into a sleep mode during which time the super capacitor is recharged. The cellular modem can reestablish the data call with the host after the super capacitor has been recharged.

System and method for wireless updates for industrial cellular communication devices in hazardous locations

Growing community of inventors

Rockledge, FL, United States of America

John Boettger