Environmentally sealed instrument loop adapter
First Claim
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1. An environmentally sealed instrument circuit adapter, comprising:
- contact sockets configured to mate with contact pins inside a connector header on a process transmitter, the connector header having a sealing surface, and also configured to connect with conductors of an instrument circuit;
a rigid insulating support that supports the contact sockets;
a sleeve with threads configured to screw onto the connector header, the sleeve having a lip;
an environmentally sealing elastomeric boot configured to seal the circuit conductors of the instrument circuit and having a elastomeric rim between the lip and the sealing surface; and
at least one washer located between the lip and the elastomeric rim, the washer having a washer surface that slides relative to the lip as the sleeve is screwed on so that twisting of the elastomeric rim is limited as the sleeve is tightened on the connector header to form a liquid-proof seal between the elastomeric rim and the sealing surface.
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Abstract
An environmentally sealed instrument circuit adapter connecting a process transmitter to instrument wiring. An environmentally sealing elastomeric part seals between a lip on an outer sleeve and a connector header of the process transmitter. One or more washers can provide sealing between the lip and the elastomeric part when tightened. The adapter protects contact pins, sockets and loop wires from damage due to liquids, humidity, dust and other contaminants.
199 Citations
19 Claims
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1. An environmentally sealed instrument circuit adapter, comprising:
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contact sockets configured to mate with contact pins inside a connector header on a process transmitter, the connector header having a sealing surface, and also configured to connect with conductors of an instrument circuit;
a rigid insulating support that supports the contact sockets;
a sleeve with threads configured to screw onto the connector header, the sleeve having a lip;
an environmentally sealing elastomeric boot configured to seal the circuit conductors of the instrument circuit and having a elastomeric rim between the lip and the sealing surface; and
at least one washer located between the lip and the elastomeric rim, the washer having a washer surface that slides relative to the lip as the sleeve is screwed on so that twisting of the elastomeric rim is limited as the sleeve is tightened on the connector header to form a liquid-proof seal between the elastomeric rim and the sealing surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An environmentally sealed instrument circuit adapter, comprising:
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contact sockets configured to mate with contact pins inside a connector header on a process transmitter;
a sleeve configured to screw on the header, the sleeve having a lip that is configured to face the header;
a cup-shaped washer located between the lip and the header, the cup-shaped washer having a washer surface that faces the lip and includes a sealing groove;
a circular electrical connector integrally formed in the center of the cup-shaped washer, the circular electrical connector having second pins connecting with the contact sockets and also configured to connect with conductors of an instrument circuit; and
a liquid-proofing elastomeric seal disposed in the sealing groove and configured to seal to the lip as the sleeve is screwed on the header. - View Dependent Claims (14)
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15. An environmentally sealed instrument circuit adapter, comprising:
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contact sockets configured to mate with contact pins inside a connector header on a process transmitter and also configured to connect with first wire ends of a two wire 4-20 mA loop;
a rigid insulating support that supports the contact sockets;
a sleeve configured to screw on the header, the sleeve having a lip that is configured to face a sealing surface on the header; and
an environmentally sealing elastomeric boot configured to seal to loop conductors of an instrument loop and having a elastomeric rim between the lip and the sealing surface. - View Dependent Claims (16, 17, 18, 19)
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Specification