FLAMEPROOF INPUT INTRINSICALLY-SAFE OUTPUT TRANSMITTER

• US 20200014411A1
• Filed: 12/27/2017
• Published: 01/09/2020
• Est. Priority Date: 02/09/2017
• Status: Active Grant

• Current Assignee: Yokogawa Electric Corporation
• Original Assignee: Yokogawa Electric Corporation
• Inventors: SAITO, Hitoshi, TANAKA, Yasuhiro
• Granted Patent: US 10,637,516 B2
• Time in Patent Office: Days
• CPC Class Codes: G08C 19/02 in which the signal transmitted is magnitude of current or voltage G08C19/36, G08C19/38 take precedence
• CPC Class Codes: H04B 1/03 Constructional details, e.g. casings, housings
• CPC Class Codes: H04B 1/04 Circuits
• CPC Class Codes: H04Q 2209/30 using a wired architecture
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• CPC Class Codes: H04Q 2209/88 Providing power supply at the sub-station
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

To wirelessly transmit, from intrinsically-safe type equipment placed in a hazardous area, a loop electrical signal measurement value obtained from flameproof type equipment. A flameproof input intrinsically-safe output transmitter covered with a flameproof enclosure includes an intrinsically-safe-side terminal connected to an intrinsically-safe built-in battery type wireless device, a flameproof-side electrical signal terminal configured to input a loop electrical signal, and an electrical input signal transmitter circuit configured to measure the loop electrical signal and transmit a signal in accordance with a measurement result to the intrinsically-safe-side terminal.

Claims

1. A flameproof input intrinsically-safe output transmitter covered with a flameproof enclosure, comprising:

an intrinsically-safe-side terminal connected to an intrinsically-safe built-in battery type wireless device;

a flameproof-side electrical signal terminal configured to input a loop electrical signal; and

an electrical input signal transmitter circuit configured to measure the loop electrical signal and transmit a signal according to a measurement result to the intrinsically-safe-side terminal.

3. The flameproof input intrinsically-safe output transmitter according to claim 1, wherein

the electrical input signal transmitter circuit performs operation by means of power supplied via the intrinsically-safe-side terminal.

4. The flameproof input intrinsically-safe output transmitter according to claim 1, further comprising:

a grounding terminal connected to a minus side of the intrinsically-safe-side terminal.

2. A flameproof input intrinsically-safe output transmitter covered with a flameproof enclosure, comprising:

an intrinsically-safe-side terminal connected to an intrinsically-safe built-in battery type wireless device;

a flameproof-side dry contact terminal configured to input dry contact status; and

an electrical input signal transmitter circuit configured to transmit a signal in accordance with the dry contact status to the intrinsically-safe-side terminal.