Sierra Monitor Corporation Sentry 5100-28-IT Specification Sheet

Proven Performance

Proven Technology

Proven Support

Information Technology (IT) at the component level! An
Infrared (IR) Combustible Gas Sensor Module is
network-enabled to provide the interface needed to your
plant-wide control system, whether it be 4-20 mA,
Modbus, HART, relay contacts or SentryBus. This USA­made, stand-alone smart gas sensor module is loaded
with features you need. As usual, Sierra Monitor A gas
detector with a Sierra Monitor pedigree, Factory Mu-
tual approved and ready to Manage Your Gas Risk.
The 5100-28-IT provides all the built-in features desired
by instrumentation and safety professionals, including:

• FM Approval for performance and safety

• SIL-2 Certified

• Modbus RTU RS-485 interface

• 4-20 mA output

• HART interface

• SMC Sentry digital bus interface

• Optional Integral 8 AMP alarm relays – Alarm,

Warning

• Aluminum or 316 Stainless Steel enclosure

• Annual calibration frequency

• %LEL or % volume

• Interface to multiple protocols

• Integral scrolling LED display

• Optional remote sensor

The 5100-28-IT can be used as a 4-20 mA component
or as a Modbus RTU node. For higher level system
capability the module can interface directly to Sierra
Monitor’s Sentry Controller. As part of a Sentry system
the user gains capability of system Modbus serial com­munications, extensive diagnostic features, area and
zone alarm management, WebServer interface and mul­tiplexing sensor connections.

Sentry IT Gas Sensor Module

IT Combustible - Infrared

Factory Mutual (FM) Approval for performance, electri­cal safety and environmental parameters including Class
I, Div. 1, Groups B, C, D and Class I, Zone 1, Group
IIC. The 5100-28-IT is also SIL-2 Certified and meets
NFPA-72 requirements for gas detectors.

How It Works

Most combustible gases absorb infrared light energy at
defined wavelengths, providing an absorption signature
for that gas. The principle of an infrared detector is based
upon the absorption of the infrared light at a specific wave­length as it passes through the gas. The more of the ab­sorbing gas that is present, the more light is absorbed.
The detector measures the energy from an infrared light
beam at a wavelength that is absorbed by the gas and
compares it to the energy emitted by the source. The dif­ference in energy received by the detector indicates the
level of gas in the atmosphere.

serutaeFstifeneB





ecafretniyaler,TRAH,sub







Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 USA [phone] [phone] Fax: [phone]

rofdevorppAMF suodrazahdnaecnamrofr

ep

noitarepoaera htiw,D,C,BpuorG,1.viD,IssalC,

deifitreC2-LIS sdradnatsngisedytilibailermretgnolste

yalpsidgnillorcslacoL sagotsseccaysaednanoitarbilacfoesaE

Visit our website: www.sierramonitor.com E-mail: [e-mail]

metsysnevirdunem,noitarbilacevisurtni-noN tuohtiweludometarbilacylkciuqdnaylisaeotelbA

alced

yrtneS,Am02-4,subdoMhtiwelbitapmockrowteN

o

04-rofdetarerusolcneX4AMEN

o

671ot

saeraF

eM

aeraehtgniyfiss

ravanillatsniotysaE

scitsongaiddnasutatsyaler,noitartnecnoc

ysaesulpsnoitacilppadleiffoytei

dedeenreverehwnoitamrofniytefaslacitircniatboot

saerasuodrazahninoitarepoelbailerdnaefasroF

:snoitacificep

S

S

O

O

C

C

y

:epytrosne

:ecnamrofreP :noitpmusnocrewoPsttaw3

:egnaRlauD :epytnoitcennoCeriw4

:tluafeDenahteMLEL%001-0:egatlovtupnICDV03-01:lanimonCDV42

:gnitteSresUenahteM.lovyb%001-0 :egnaRgnitare

:ytilibataepeR

LEL%1-/+

:ycaruccA

:efiLrosneSsraey5>yllacipyT :noitcurtsnoC

sneSdetaeHnoitasnednoctneverpotllecdetaeH:snoisnemiD)mc.21x21x12(.ni9.4x8.4x1.8)lA(

:ro

:emiTesnopseR

L

:ytireni

:tfirDoreZ

ces01<06T

LEL%1-/+

htnom/LEL%1-/+

:tuptu

:yalpsiDDELgnillorcSdnadexiF:gnisuoHrosneS

:tuptuOlangiSsublatigi

dyrtneSaerAsuodrazaH

bilaC 1enoZ,IssalCD,C,BspuorG

:yaleR

:snoitp

:syaleRgninraW,mralApma8 :slavorppA

S

TRAH,TRAHsedulcnidraobnoitanimreT

htgnelevaWlauD,derarfnI :ataDlacirtcelE

egnarLEL%05-0rof%1-/+

egnarLEL%001-15rof%2-/+:ytidimuHevitaleRgnisnednoC-noN%59-0

)Am5.1(noitar

UTRsubdoM584-SRlaireS

elbuorT.pmA52.0

CDV03@A5,CAV052@A8

gnixelpitlumyrtne

igiD,Am02-4,584-SRsubdoMASCsnoitacolsuodrazahnierusolcneroF

IR Combustible Gas Sensor Module

pO

:thgieW

,)Am5.2,elbuorT(Am02-4golanA:noitacifissalC,1.viD,IssalC,foorpnoisolpxE

:ytnarraW

rofnoitcennocyrailixuasedulcnidraoB

lat

suByrtneSoN,tuptuoyaleRA2,tupnI

:erusolcnEeludoM

0236lavorppAMF
0063lavorppAMF

deifitreC2-LIS

tnailpmoC27APFN

:egnaRpmeTtneibmA4-

ro3

o

o

041ot

F

o

o

06ot

02-(

)C

)mc21x11x91(.ni9.4x4.4x5.7)SS(

)gK6.2(.bl4.5)SS(---)gK3.1(.bl7.2)lA(

romunimulAdetaocyxopE

leetSsselniatS613

)erusolcnesaemas(SSroLA

o

=AT

04-

o

58otC

6T,X4AMEN,56PI,66PI,CIIpuorG

CIIdxE,DG2IIC

sraey2

ecnamrofreProtceteDsaGelbitsubmoC

D,C,BspuorG,1.viDIssalC

)80516CEI(retsigeRs'dyolLybdeifitreC

Specifications subject to change without notice

Ordering Information

Model Enclosure Relay/Connection Gas Type Protection Remote

5100-28-IT - XX - XX - XX - X - X

- A1 = AL 3/4” NPT - 01 = No Relays (std.) - 01 = Methane (std.) - 0 = Standard - 0 = None

- A2 = AL M20 x 1.5 - 02 = Relays Option - 1 = Remote

- S1 = SS 3/4” NPT - 05 = HART Option Sensor

- S2 = SS M20 x 1.5

seirosseccAnoitarbila

seirosseccA

10-8535dradnatS,daeHnoitarbilaC00-1135dleihsniaR
00-0635gnittiFyrevileDsaGnoitarbilaC20-1135tropn

oitarbilachtiwdleihsniaR

yticapaChgiHsrotarbila

10-0521AepyT,tiKnoitarbilaCrosneSsaG
20-0621Aep

TrednilyCsaGLEL%05saGelbitsubmoC

Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 USA [phone] [phone] Fax: [phone]

Visit our website: www.sierramonitor.com E-mail: [e-mail]

Rev. 10/11