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Instruction Manual

D104234X012

GH04148 Proximity Switch

October 2019

2

Table 1. Specifications

Equipment Ratings 

Operating Ambient Temperature Range:

 -40°C to

85°C (-40 to 185°F)

Maximum Altitude:

 2000 m (6562 feet)

Contact Electrical Ratings

(1)

1 amp resistive, 0.5 amp inductive at 28 VDC
“Contacts” are not polarity sensitive
A bi-directional transient voltage suppressor (TVS)
rated at a clamping voltage of 59 V protects each
Solid State Switch from electrostatic discharge (ESD)
and inductive back-EMF. An additional such TVS is
installed across the NC to NO connections. The TVS
has a reverse standoff voltage of 33 V, so
misapplication of the switch in a circuit with voltage
above the 28 VDC rating could result in conduction
across an “open” set of switch leads.

Switch behavior during inadequate supply power
conditions for the electronic:

 both switches in the

open state

Process Seal

Single Seal

Internal O-ring material: 

see Construction Materials

Maximum seal pressure: 

6.9 bar (100 psi)

Seal temperature range: 

 -40 to 204°C (-40 to 400°F)

The switch is not exposed to process fluids during
normal operation.

Electrical Connections

Electrical 1/2-14 NPT external conduit connection
with 0.5 m (greater than 18 inches) of 18 AWG lead
wires. Install conduit seal within 18 inches.
Safety ground wire is 16 AWG

Wire Color

Circuit Description

White/Red

DC

White/Black

DC Supply 

Red

Normally Closed Contact

Brown

Common Contact

Blue

Normally Open Contact

Green

Ground (Housing, Safety)

Insulation Requirements: 

Should be consistent with

switched equipment rating and power supply rating,
as well as local code wiring requirements.

See block diagram in figure 1

Power Requirements for Electronics

Excitation Voltage Range for Electronics:

 9 - 30 VDC

Maximum Input Voltage Ripple:

 400 mV

Current Draw

Steady state

: Less than 15 mA

Transient (startup or switching)

: Less than 500 mA

peak

Maximum quiescent steady state power draw 
of electronics during normal operation within 
design parameters:

Pmax_quiescent: 450 mW

Maximum transient power draw of electronics 
during normal operation within design parameters:

Pmax_transient:

 

15 W

The supply terminals are protected against reverse
polarity.

With excessive voltage present on the supply
terminals, a protective bi-directional TVS will
conduct.

The guaranteed standoff voltage of the TVS is 26 V.
Breakdown occurs between 21.9 and 31.9 V.
Clamping Voltage is 42.1 V. 
Peak Pulse Power rating is 5000 W.

A common-mode choke protects against conducted
EMI.

Construction Materials

Switch body & cover:

 

Aluminum 6061 T6, chromate

conversion coated

Internal O-ring:

 Fluorosilicone rubber

-continued-

Summary of Contents for Fisher GH04148

Page 1: ...more than one approval and each approval may have unique installation requirements and or conditions of safe use Special instructions are listed by agency approval To get these instructions contact your Emerson sales office Read and understand these special conditions of use before installing WARNING Failure to follow conditions of safe use could result in personal injury or property damage from f...

Page 2: ...hes of 18 AWG lead wires Install conduit seal within 18 inches Safety ground wire is 16 AWG Wire Color Circuit Description White Red DC Supply White Black DC Supply Red Normally Closed Contact Brown Common Contact Blue Normally Open Contact Green Ground Housing Safety Insulation Requirements Should be consistent with switched equipment rating and power supply rating as well as local code wiring re...

Page 3: ...IIC T6 T5 Ta 85 C T6 Ta 78 C Dust Ex tb IIIC T T92 C T85C Db IP6X 1 A Max Ingress Protection Rating per IEC 60529 IP66 Special Conditions of Safe Use 1 1 2 14 NPT conduit connection which is integral to the body of the switch to be sealed within 18 inches 2 Flame proof joints are not intended to be repaired 3 Keep cover tight while circuits are alive 4 Garder le couvercle bien fermé tant que les c...

Page 4: ...they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice E 2019 Fisher Controls International LLC A...

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