Emerson JB-MPG, JB-MPNS, JB-IR3SAR, JB-MPH, JB-MPR Reference Manual

Net Safety™ JB Series Junction Box

Reference Manual

MAN-0081, Rev 5

June 2016

Important Instructions

Installing, operating or maintaining a Net Safety Product improperly could lead to serious injury or
death from explosion o r e xposure to dangerou s substances.
product, in this manual, and in any local and national codes that apply to the product.
untrained personnel to work with this product.
this manual.

Net Safety designs, manufactures and tests p r o d uc ts to function within specific conditions. Because
these products are sophisticated techni c al instruments, it is important that the owner and operation
personnel must strictly adhere both to the information printed on the product nameplate and to all
instructions provided in this manual prior to installation, operation, and maintenance.

Comply with all information on the

Do not allow

Use Net Safety parts and work procedures specified in

Notice

The contents of this publication are presented for informational purposes only, and while every effort
has been made to ensure their accuracy, they are not to be construed as warranties or guar antees,
expressed or implied, regarding the products or services described herein or their use or applicability.
All sales are governed by Net Safety’s 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.

Net Safety does not assume responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use and maintenance of any Net Safety products remains solely with
the purchaser and end user.

To the best of Net Safety’s knowledge the information herein is complete and accurate. Net Safety
makes no warranties, expressed or implied, including implied warranties of merchantability and fitness
for a particular purpo se with respect to this m an ual and, in no event, shall Net Safety be l i ab l e for any
incidental, punitive, special or consequential damages including, but not limited to, loss of production,
loss of profits, loss of revenue or use and costs incurred including without limitation for capital, fuel and
power, and claims o f third parties.

Warranty

Limited Warranty

Resale Products

Limitation of Remedy and Liability

1.
Liability) herein, Seller warrants that (a) the licensed firmware embodied in the Goods will
execute the programming instructions provided by Seller; (b) that the Goods manufactured by
Seller will be free from defects in materials or workmanship under normal us e and ca re; and (c)
Services will be performed by trained personnel using proper equipment and instrumentation
for the particular Service provided. The foregoing warranties will apply until the expiration of
the applicable warranty period. Sensors and detectors are warranted ag ainst defective parts
and workmanship as per Section
to Buyer (
Buyer agrees that Seller has no liability for Resale Products beyond making a reasonable
commercial effort to arrange for procurement and shipping of the Resale Products. If Buyer
discovers any warranty defects and notifies Seller thereof in writing during the applicable
warranty period, Seller shall, at its option, (i) correct any errors that are found by Seller in the
firmware or Services; (ii) repair or replace FOB point of manufacture that portion of the Goods
found by Seller to be defective; or (iii) refund the purchase price of the defective portion of the
Goods/Services. All replacements or r e pairs necessitated b y i n ade q uate maintenance; no r m al
wear and usage; unsuitable power sources or environmental conditions; accident; misuse;
improper installation; modification; repair; use of unauthorized replacement parts; storage or
handling; or any other cause not the fault of Seller, are not covered by this limited warranty and

shall be replaced or repaired at Buyer’s sole expense and Seller shall not be obligated to pay

any costs or charges incurred by Buyer or any other party except as may be agreed upon in
writing in advance by Seller. All costs of dismantling, reinstallation, freight and the time and
expenses of Seller’s personnel and representatives for site travel and diagnosis under this
limited warranty clause shall be borne by Buyer unless accepted in writing by Seller. Goods
repaired and parts rep laced by Seller dur i ng the war ranty period shall b e i n war r ant y for the
remainder of the original warranty period or 90 days, whichever is longer. This limited warranty
is the only warranty made by Seller and can be amended only in a writing signed by an
authorized representative of Seller. The limited warranty herein ceases to be effective if Buyer
fails to operate and use the Goods sold hereu nde r i n a safe and reasonable manner a nd i n
accordance with any written instructions from the manufacturers. THE WARRANTIES AND
REMEDIES SET FORTH ABOVE ARE EXCLUSIVE. THERE ARE NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, AS TO M ER CHANTABILITY, FITNESS FOR
PARTICULAR PURPOSE OR ANY OTHER MATTER WITH RESPECT TO ANY OF THE GOODS OR
SERVICES.

. Subject to the limitations contained in Section 10 (Limitation of Remedy and

7.3. Products purchased by Seller from a third party for resale

) shall carry only the warra n ty extended by the ori g i nal manufacturer.

2.
DELAY IN PERFORMANCE. THE REMEDIES OF BUYER SET FORTH IN THE AGREEMEN T ARE
EXCLUSIVE. IN NO EVENT , R EGARDLESS OF THE FORM OF T HE C L AIM OR CAUSE OF ACTION
(WHETHER BASED IN CONT R AC T, INFRINGEMENT, NEGLIGENC E, ST R I C T L I ABIL IT Y , OTHER

TORT OR OTHERWISE), SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS

EXCEED THE PRICE TO BUYER OF THE SPECIFIC GOODS M AN UF AC TURED OR SERVICES
PROVIDED BY SELLER GIVING RISE TO THE CLAIM OR CAUSE OF ACTION. BUYER AGREES T HAT

IN NO EVENT SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS EXTEND TO

INCLUDE INCIDENTAL, CONSEQUENTIAL OR PUNITI VE DAMAGES. THE TERM

“CONSEQUENTIAL DAMAGES” SHALL INCLUDE, BUT NOT BE LIMITED TO, LOSS OF

ANTICIPATED PROFITS, R EVENUE OR USE AND COSTS INC UR R ED I N C L UDI N G WITHOUT
LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF BUYER’S CUSTOMERS.

. SELLER SHALL NOT BE LIABLE F OR DAM AGES CAUSED BY

Reference Manual Table of Contents

Table of Contents I

MAN-0081, Rev 4 June 2016

Contents

Section 1: Introduction ...................................................................... 1

1.1 Models covered ................................................................................................................... 1

1.1.1 Models covered: ................................................................................................... 1

1.2 Service support ................................................................................................................... 1

1.3 Return of material ............................................................................................................... 2

1.4 Product recycling/disposal .................................................................................................. 2

Section 2: Installation ........................................................................ 3

2.1 Unpacking and inspection ................................................................................................... 3

2.2 Dimensions ......................................................................................................................... 3

2.3 Mounting ............................................................................................................................ 3

2.4 Wiring ................................................................................................................................. 4

2.4.1 Device separation distance ................................................................................... 4

2.4.2 Seals ..................................................................................................................... 4

2.4.3 Terminal block connections .................................................................................. 5

2.4.4 Ground connections ............................................................................................. 5

2.5 Installation chec klist ............................................................................................................ 6

Section 3: Terminal board configurations .......................................... 7

3.1 Flame detection .................................................................................................................. 7

3.1.1 Models: UVS-A, and UV/IRS-A ............................................................................... 7

3.1.2 Models: IR3S-AD ................................................................................................... 8

3.1.3 Models: UVS-AR, and UV/IRS-AR ........................................................................... 8

3.1.4 Models: IR3S-A ...................................................................................................... 9

3.1.5 Models: IR3S-D ................................................................................................... 10

3.1.6 Models: IR3S-R .................................................................................................... 10

3.1.7 Models: IR3S-AR ................................................................................................. 11

3.2 Gas detection .................................................................................................................... 12

3.2.1 Models: Millennium II ST3 and SC3 sensor seri es ................................................. 12

3.2.2 Millennium SIR100 and APM ............................................................................... 13

3.2.3 Millennium ST1 toxic sensor series ...................................................................... 13

3.2.4 Millennium SC1 combustible sensor series .......................................................... 14

3.2.5 Millennium ST2 & Gas Shie l d ST7 toxic sensor seri es ............................................ 14

3.3 Common junction boxes ................................................................................................... 15

3.3.1 HART Port remote connection box (JB-MPH-A/S)................................................. 15

3.3.2 General termination box (JB-MPG-A/S) ................................................................ 15

Section 4: Maintenance ................................................................... 16

4.1 Troubleshooting ............................................................................................................... 16

4.2 Storage ............................................................................................................................. 16

4.3 Spare parts and accessories ............................................................................................... 16

Section 5: Electrostatic sensitive device ........................................... 17

Section 6: Wire resistance table ....................................................... 18

Section 7: Specifications .................................................................. 19

7.1 Electrical ........................................................................................................................... 19

7.1.1 Operating voltage ............................................................................................... 19

7.1.2 Conduit entries ................................................................................................... 19

7.1.3 Power consumption (JB-IR3SAR) ......................................................................... 19

Introduction Reference Manual

II Table of Contents

June 2016 MAN-0081, Rev 5

7.1.4 Relay contacts (JB-IR3SAR) .................................................................................. 19

7.2 Environmental................................................................................................................... 19

7.2.1 Storage temperature .......................................................................................... 19

7.2.2 Operating temperature ...................................................................................... 19

7.2.3 Relative humidity ................................................................................................ 19

7.2.4 Metallurgy (housing ) .......................................................................................... 19

7.2.5 Ingress protection............................................................................................... 19

7.2.6 Weight ............................................................................................................... 19

7.3 Warranty ........................................................................................................................... 19

Section 8: Certifications ................................................................... 20

8.1 North America................................................................................................................... 20

Section 9: Ordering information ...................................................... 21

Reference Manual Introduction

Introduction 1

MAN-0081, Rev 5 June 2016

Section 1: Introduction

1.1 Models covered

The Net Safety JB serie s junction box is a mul ti-purpose junction box th at i s used with numerous Net
Safety products. It can b e used as a termination box for flame detectors or for remote mounting gas
sensors from transm i tt er s. I t is available in co pp e r -free Aluminum or 316 Stainless Steel.

1.1.1 Models covered:

• JB-IR3SAR - Used with IR3S-AR flame detectors to provide 4–20 mA analog and relay outputs

• JB-MPD - Used for remote mounting of Millennium II combustible (SC3) and toxic (ST3) gas

sensors, Millennium combustible (SIR100) IR sensors, and APM sensors

• JB-MPG - General juncti o n box used to separate Millennium toxic (ST2), Millennium

combustible (SC1100), and Gas Shield sensors from their transmitter

• JB-MPH - Used to separate the HART

• JB-MPNS - Used with the IR3S-A, UVS-A, and UV /I RS-A flame detectors and separated

Millennium toxic sensors (ST1); i ncludes current loop test jacks

• JB-MPR - Used with UVS-AR and UV/IRS-AR relay models only

• JB-MPR3 - Used with IR3S-R relay models only

• JB-MPS - Used with UVS-A and UV/IRS-A flame detectors only, includes magnetic switch for

manual VI testing

1.2 Service support

Technical support for this product can be provided by contacting your local Emerson™ Process
Management/Net Safety represent ativ e o r b y c o ntacting the Net Safety Technical Suppor t dep artment
at [phone] or [e-mail]

®

Port (HPT-001) from the HAR T device

.

Introduction Reference Manual

2 Introduction

June 2016 MAN-0081, Rev 5

1.3 Return of material

To expedite the repair and return of this product, proper communication between the customer and
the factory is important. Before returning a product for repair, call [phone] or e-mail

[e-mail]

On the return of the equipment, include the following information:

1. MRA number provided to you by Emerson

2. Company name and contact information

3. Purchase order, from your company, authorizing repairs or request for quote
Ship all equipment, prepaid to:

Emerson Process Ma nag ement
6021 Innovation Blvd .
Shakopee, MN 5537 9

Mark all packages with Return for R e pai r and include MRA number

for a Material Return Authorization (MRA) number.

Pack items to protect them from damage and use anti-static bags or aluminum-backed cardboard as
protection from electrostatic damage.

All equipment must be shipped prepaid. Co llect shipments will not be accepted.

1.4 Product recycling/disposal

Recycling of equipment and packaging should be taken into consideration and disposed of in
accordance with local and national legislations/regulations.

Reference Manual Installation

Installation 3

MAN-0081, Rev 5 June 2016

Section 2: Installation

2.1 Unpacking and inspection

Carefully remove all of the components from the packaging and verify them against the enclosed
packing list. Inspect all components for any obvious damage suc h as b r oken or loose parts. If you find
any components missing or damaged, notify your local Net Safety representative or the factory
immediately.

Recycling of packaging should be taken into consideration and disposed of in accordance with local and
national legislations/regulations.

2.2 Dimensions

The following drawing outlines the dimensions of the junction box. Measurements are in inches and
millimeters. As a standard, the junction box is provided with one (1) conduit plug.

Figure 2-1 Net Safety Junction Box Dimensional Drawing

2.3 Mounting

Three (3) conduit entries located on the junction box body are available in ½ inch–14 NPT, ¾ inch–14
NPT, or M20 × 1.5 mm thre ad. The standard of fe r i ng i s ¾ inch NPT, consult your Emerson Process
Management/Net Safety representativ e fo r availability of other conduit entry sizes. Connection of
conduit, cable glands, sensors, or detectors to these conduit entries should be done so by use of tools.
A 6 mm Hex Key is required for installing or removing conduit entry plugs. Use a 1.5 mm Hex key to
tighten the locking Hex screw securing the top cover. The junction box has mounting holes for
installing directly on a wall or to a pole, with the aid of a pole mounting kit, as desired.

Installation Reference Manual

4 Installation

Failure to follow these installation guidelines could result in death or serious injury. Ensure that only
qualified personnel perform the installation.

Electrical shock could cause death or serious injury. Use extreme caution when makin g c o ntact with the
leads and terminals.

Do not open the junction box enclosure when in a classified area or when an explosive atmosphere may
be present unless the power to the sensor has been removed.

Prior to touching the painted enclosure surface or non-metallic labels, dispel any charge in your body or
equipment by touching a grounded metal surface to prevent the generation of

Installation shall be in accordance with t he manufacturer ' s i n str uc ti ons and the Natio nal E l e ct r i c al
Code

The use of shielded cable is highly recommended

electrical or electromagnetic ‘noise’. To meet EN/IEC61326 EMC requirements, multi

shield cable is recommended. Connection of conduit or cable glands should be done so by use of tools.
In applications where the wiring is installed in conduit, the conduit must not be used for wiring to other

electrical equipment.
The junction box may be susceptible to ESD. Refer to

handling of this equipment.
The temperature rating of the wires co nnected to the junction box must be greater than

(100 °C).

To fully avoid any environmental exposure, the use of seals is recommended, especially for installations
that use high

June 2016 MAN-0081, Rev 5

2.4 Wiring

a spark.

®

(NEC), ANSI/NFPA 70, the Canadian Electric al Code C22.1, or EN60079-14, as applicable .

to protect against interfere nce caused by extraneous

Section 5 for further information on proper

2.4.1 Device separation distance

The maximum separati o n distan ce betw een the junction box and the connected device is limited by
the resistance of the c o n nected wiring, which is a function of the gauge of the wire being used. Net
Safety recommend s that separation must not exceed 20 00 feet (610 meters) while using 16 AWG (1.31

2

) wire. The Net Safe ty M illennium SC1100 co m b ustible sensor should not be separated mo r e than

mm
150 feet (46 meters). Refer to Section 6 for wire gauges and resistance values.

2.4.2 Seals

-conductor braid

212 °F

Water-proof and explosion-proof conduit seals are recommended to prevent water accumulation
within the enclosure.

Seals should be locat ed as c lose to the device as possible and not more than 18-in. (46cm) away; seal all
conduits within 18-in. (46 cm). Consult the local electrical code for specific requirements.

-pressure or steam cleaning devices in proximity to the junction box.

Reference Manual Installation

Installation 5

Teflon

Field maintenance or servicing on the junction box is not recommended. If there are any issues,
concerns

Do not open the transmitter, sensor, or junction box enclosure when in a classified ar ea or when an
explosive at

Prior to touching the painted enclosure surface or non-metallic labels, dispel any charge in your body or
equipment by touching a grounded metal surface to prevent the generation of a

MAN-0081, Rev 5 June 2016

Explosion proof installations may require an additional seal where the conduit enters a non-hazardous
area. Ensure conformity with local wiring codes.

When pouring a seal, u se a fiber dam to ensure proper formation of the seal. Seals should never be
poured at temperatures below freezing. Always refer to the seal manufacturers r ec ommendations.

The jacket and shielding of the cable should be stripped back to permit the seal to fo r m ar o un d t he
individual wires. This will prevent air, gas, and water leakage through the insi d e of the shield and into
the enclosure.

It is recommended that explosion-proof drains and conduit breathers be used. In some applications,
alternate changes in te mperature and bar o m etr ic pressure can cause breathing which allows moist air
to enter and circulate inside the conduit. Joints in the conduit system are seldom tight enough to
prevent this breathin g.

Threaded connections on the enclosure between the housing and conduit pipe need to be sealed with
thread tape, such as

The conduit openings are gauged using an L-1 gauge to +½ to 2 turn tolerance.

tape, or something similar.

, or warranty information requi red , co ntact Net Safety.

2.4.3 Terminal block connections

mosphere may be present unless t he power to the sensor has been remo ved.

When connecting cab l e wi r es, use a small flathead screwdriver to gently press down and hold the
spring connector open. Insert the appropriate wire into the open connector hole, releasing the
screwdriver to secure the wire. Refer to Figure 2-2 below.

Figure 2-2 Terminal Connection

spark.

2.4.4 Ground connections

The junction box is equipped with an internal and external earth ground lug. One crimp connector is
provided for each ground lug. On installation, crimp the ground wire to crimp connector and then
securely fasten crimp connector to ground lug. See Figure 2-3 below for locations of internal and
external grounding lugs.

Installation Reference Manual

6 Installation

Internal Ground Lug

External Ground Lug

Crimp Connector

June 2016 MAN-0081, Rev 5

Figure 2-3 Ground Lug Locations and Crimp Connector

2.5 Installation checklist

Review the following checklist prior to turning the power on to the junction box after installation h as
been completed:

• Ensure that the junctio n box is properly and firmly mounted.

• Ensure that stopping plugs are securely tightened on any unused conduit entrie s .

• Ensure that the junction box is not obstructed such that it is accessible.

• Ensure adherence to applicable local guidelines and requirements on wiring and sealing of equipment in

hazardous and non-hazardous areas.

• Ensure that proper shielding and grounding practices are adhered to and local codes are being followed.

• Check system operational voltage and conditions and ensure that they are within the applicable specifications of

the connected devices.

• Verify wiring at all termination and junction points (junction box and power supply ) .

Reference Manual Terminal board configurations

Terminal board configurations 7

Section 3:

In the following drawings, the flame detector wiring side refers to wiring between the fl ame detector
an
source and the junction box.

Flame detector wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2 Not used

3 Not used

4

Blue

MVI 5 White

Vdc (+)

6

Black

COM (-)

7

Red

4–20 mA

Power and output wiring

Terminal

Function

1 (GND)

Earth ground

2

Not used

3

Not used

4

MVI

5

Vdc (+)

6

COM (-)

7

4–20 mA

Meter test jacks

MVI test switch (JB-MPS only)

JB-MPS-A/S or JB-MPNS-A/S

Note: Shield should be terminated

MAN-0081, Rev 5 June 2016

Terminal board configurations

There are multiple terminal board configurations facilitated by the JB series junction box. This allows
effective, safe, and accurate te r m i nat i o ns and sensor separati on requirements ac r o ss the Net Safety
product line. These configurations are outlined below.

Each model of the multi-purpose junctio n b o x c o ntai ns a PCB with different components for features
that are applicable to sp e cific models of Ne t Safe ty p r o ducts, such as meter test jacks or a magnetic
switch. Refer to the specific transmitter, detecto r , or sensor manuals for detailed instructions about
using these options.

3.1 Flame detection

d the junction box terminals. Pan el/PLC/DCS/RTU wir ing side refers to wiring between the power

Wiring should be done according to the designated terminal connectors.

3.1.1 Models: UVS-A, and UV/IRS-A

at the Panel/PLC/DCS/RTU

Terminal board configurations Reference Manual

8 Terminal board co nfigurations

Flame detector wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

Red

Vdc (+)

3

Black

COM (-)

4

Blue

A (Comm)

5

Brown

B (Comm)

6

Purple

ISO (+)

7

Yellow

4–20 mA

Power and output wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

A (Communication)

5

B (Communication)

6

ISO (+)

7

4–20 mA

Meter test jacks

JB-MPNS-A/S

Note: Shield shoul d b e te r m i nate d at

June 2016 MAN-0081, Rev 5

3.1.2 Models: IR3S-AD

3.1.3 Models: UVS-AR, and UV /I RS -AR

the Panel/PLC/DCS/RT U

Reference Manual Terminal board configurations

Termi nal bo ard configurations 9

Flame detector wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

Red

Vdc (+)

3

Black

COM (-)

4 Not used

5 Not used

6

Purple

ISO (+)

7

Yellow

4–20 mA

Power and output wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

Not used

5

Not used

6

ISO (+)

7

4–20mA

Meter test jacks

JB-MPNS-A/S

Note: Shield shoul d b e te r m i nate d at

Flame detector wiring

Terminal

Color

Function

B

Blue

Manual Vi/MVI

R

Red

4–20 mA Signal

BLK

Black

COM (-)

W

White

Vdc (+)

Green

Earth Ground

Power and output wiring

Terminal

Function

RRst

Remote Reset

MVI

Manual VI

SIG

4–20 mA Signal Output

-PWR

COM (-)

+PWR

Vdc (+)

Fire Relay Contacts

JB-MPR-A/S

Note: Shield should be terminated

Relay Contacts

NO

Normally Open

NC

Normally Closed

COM

Common

Fault Relay Contacts

MAN-0081, Rev 5 June 2016

at the Panel/PLC/DCS/RTU

3.1.4 Models: IR3S-A

the Panel/PLC/DCS/RT U

Terminal board configurations Reference Manual

10 Termi nal bo ard configurations

Flame detector wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

Red

Vdc (+)

3

Black

COM (-)

4

Orange

Alarm relay

5

Orange

Alarm relay

6

Violet

Fault relay

7

Violet

Fault relay

Power and output wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

Alarm relay

5

Alarm relay

6

Fault relay

7

Fault relay

Meter test jacks

JB-MPR3-A/S

Note: Shield shoul d b e te r m i nate d at

Flame detector wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

Red

Vdc (+)

3

Black

COM (-)

4

Blue

A (Comm)

5

Brown

B (Comm)

6 Not used

7 Not used

Power and output wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

A (Communication)

5

B (Communication)

6

Not used

7

Not used

Meter test jacks

JB-MPNS-A/S

Note: Shield shoul d b e te r m i nate d at

June 2016 MAN-0081, Rev 5

3.1.5 Models: IR3S-D

3.1.6 Models: IR3S-R

the Panel/PLC/DCS/RT U

the Panel/PLC/DCS/RT U

Reference Manual Terminal board configurations

Termi nal bo ard configurations 11

Flame detector w i r i n g (J1)

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

Red

Vdc (+)

3 Not used

4

Black

COM (-)

5

Purple

ISO (+)

6

Yellow

4–20 mA

Power and output wiring (J2)

Terminal

Function

1

Reset

2

4–20 mA

3

ISO (+)

4

COM (-)

5

Not used

6

Vdc (+)

JB-IR3SAR-A/S

Note: Shield shoul d b e te r m i nate d at

Relay wiring

Terminal

Relay

Contact state

1

Fault

NO 2 Common

3

NC

4

Alarm

NO 5 Common

6

NC

Coil and latch status (DIP switch)

Alarm relay

Position 1

Position 2

De-energized/non-latching

On

On

Energized/non-latching

On

Off

De-energized/latching

Off

On

Energized/latching

Off

Off

MAN-0081, Rev 5 June 2016

3.1.7 Models: IR3S-AR

the Panel/PLC/DCS/RT U

By default the Fault rel ay is fixed as Energize d and Non-latching and cannot be changed. The default
setting for the Alarm r e l ay is De-energized and Non-latching. The current loop jumper pins at J6 are not
jumpered by default.

If 4–20 mA is not being used close the loop by placing the current loop jumper over pins (short J6). To
reset latched alarm, connect Reset (Terminal 1) to ground, recycle power or activate Reset magnetic
switch using the magnet.

Terminal board configurations Reference Manual

12 Termi nal bo ard configurations

In the following drawings, the sensor wiring side refers to the wiring between the gas transmitter and
the junction box terminal s.

and the

junction box

Sensor wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

White

Vdc (+)

3

Black

COM (-)

4

Red

A (Comm)

5

Blue

B (Comm)

6 Not used

7 Not used

Transmitter wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

Sig A

5

Sig B

6

Not used

7

Not used

Resistor (120 ohms)

JB-MPD-A/S

Note: Shield shoul d b e te r m i nate d at

June 2016 MAN-0081, Rev 5

3.2 Gas detection

The transmitter wiring side refers to wiring between the transmitter

terminals.

3.2.1 Models: Millennium II ST3 and SC3 sensor series

the Panel/PLC/DCS/RT U

Reference Manual Terminal board configurations

Termi nal bo ard configurations 13

Sensor wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2 Not used

3 Not used

4 Not used

5 Not used

6

Red

Vdc (+)

7

Black

4–20mA

Transmitter wiring

Terminal

Function

1 (GND)

Earth ground

2

Not used

3

Not used

4

Not used

5

Not used

6

Vdc (+)

7

4–20mA

Meter test jacks

JB-MPNS-A/S

Note: Shield shoul d b e te r m i nate d at

Sensor wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

White

Vdc (+)

3

Black

COM (-)

4

Blue

A (Comm)

5

Red

B (Comm)

6 Not used

7 Not used

Transmitter wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

Sig A

5

Sig B

6

Not used

7

Not used

Resistor (120 ohms)

JB-MPD-A/S

Note: Shield shoul d b e te r m i nate d at

MAN-0081, Rev 5 June 2016

3.2.2 Millennium SIR100 and APM

3.2.3 Millennium ST1 toxic sensor series

the Panel/PLC/DCS/RT U

the Panel/PLC/DCS/RT U

Terminal board configurations Reference Manual

14 Termi nal bo ard configurations

Sensor wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

Red

Vdc (+)

3

Blue

Communication

4

Black

COM (-)

5 Not used

6 Not used

7 Not used

Transmitter wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

Communication

4

Com (-)

5

Not used

6

Not used

7

Not used

JB-MPG-A/S

Note: Shield shoul d b e te r m i nate d at

Sensor wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2

White

Vdc (+)

3

Red

Signal

4

Black

COM (-)

5 Not used

6 Not used

7 Not used

Transmitter wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

Signal

4

Com (-)

5

Not used

6

Not used

7

Not used

JB-MPG-A/S

Note: Shield shoul d b e te r m i nate d at

June 2016 MAN-0081, Rev 5

3.2.4 Millennium SC1 combustible sensor series

the Panel/PLC/DCS/RT U

3.2.5 Millenniu m ST2 & Gas Shield ST7 toxic sensor serie s

the Panel/PLC/DCS/RT U

Reference Manual Terminal board configurations

Termi nal bo ard configurations 15

Sensor wiring

Terminal

Color

Function

1 (GND)

Green

Earth ground

2 As assigned

3 As assigned

4 As assigned

5 As assigned

6 As assigned

7 As assigned

Transmitter wiring

Terminal

Function

1 (GND)

Earth ground

2

As assigned

3

As assigned

4

As assigned

5

As assigned

6

As assigned

7

As assigned

JB-MPG-A/S

Note: Shield shoul d b e te r m i nate d at

Millennium II transmitter or flame

detector wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

Not used

5

Not used

6

ISO (+)

7

4–20mA

Power and output wiring

Terminal

Function

1 (GND)

Earth ground

2

Vdc (+)

3

COM (-)

4

Not used

5

Not used

6

ISO (+)

7

4–20mA

JB-MPH-A/S

Note: Shield shoul d b e te r m i nate d at

HART Port connector

MAN-0081, Rev 5 June 2016

3.3 Common junction boxes

3.3.1 HART Port remote connection box (JB-MPH-A/S)

The HART Port connector plugs onto the PCB board. The Black wire is a
safety ground. Connect the black wire to earth ground. When no earth
ground is available connect the black wire to the loop common.

3.3.2 General termination box (JB-MPG-A/S)

the Panel/PLC/DCS/RT U

the Panel/PLC/DCS/RT U

Maintenance Reference Manual

16 Maintenance

Description

Part number

Replacement terminal board for model JB-MPS-A/S

PCBA-0252C

Replacement terminal board for model JB-MPNS-A/S

PCBA-0252B

Replacement terminal board for model JB-MPH-A/S

PCBA-0252A

Replacement terminal board for model JB-MPD-A/S

PCBA-0252D

Replacement terminal board for model JB-MPG-A/S

PCBA-0252E

Replacement terminal board for model JB-MPR3-A/S

PCBA-0252F

Replacement terminal board for model JB-IR3S-AR-A/S

PCBA-0268

¾-in. to M20 certified conduit reducer - aluminum

M20R

¾-in. to M20 certified conduit reducer - stainless

M20R-SS

¾-in. NPT certified conduit plug - aluminum

CP-AL-002

¾-in. NPT certified conduit plug - stainless

CP-SS-001

1-in. pipe mounting bracket (stainless steel)

UN-MK-31

2-in. pipe mounting bracket (stainless steel)

UN-MK-32

3-in. pipe mounting bracket (stainless steel)

UN-MK-33

June 2016 MAN-0081, Rev 5

Section 4: Maintenance

4.1 Troubleshooting

The junction box is not designed to be repaired in the field. If problems should develop, first check for
faulty wiring and confirm proper voltage to the junction box. If problems persist, contact Net Safety’s
technical support department first by phone to try and resolve any issues. If issue s c annot be resolved,
please follow the procedure in Section 1.3 Return of material.

4.2 Storage

The sensor and its electronic components/parts should be stored in locations free from dust, liquid
spills, contaminants, and moisture. The storage temperature should be well within the limits of the
certified temperatures of the equipment. See Section 7 for certified temperatures.

4.3 Spare parts and accessories

Reference Manual Electrostatic sensitive device

Electrostatic sensitiv e device 17

MAN-0081, Rev 5 June 2016

Section 5: Electrostatic sensi ti ve d evi ce

Definition: Electrostatic discharge (ESD) is the transfer, b etwee n bo di es, of an electrostatic charge
caused by direct contact or induced by an electrostatic field.

The most common cause o f ESD is physical cont act. Touching an object can cause a discharge of
electrostatic energy. If the charge is sufficient and occurs near electronic components, it can damage
or destroy those components. In some cases, damage is instantane o us and an immediate malfunction
occurs. However, symptoms are not always immediate—performance may be marginal or seemingly
normal for an indefinite period of time, followed by a sudden failure.

To eliminate potential ESD damage, review the following guidelines:

• Handle boards by the sid es —taking care not to touch electronic components.

• Wear grounded wrist o r foot straps, ESD shoe s o r he el grounders to dissipate unwanted static e nergy.

• Prior to handling boards, dispel any charge in your body or equipment by touching a grounded metal surface.

• Ensure all compone nts are transported an d st o r e d in ESD safe packaging.

• When returning boards, carefully package i n t he original carton and static protective wrapping.

• Prior to touching the painted enclosure surface or no n-metallic labels, dispel any charge in your body or

equipment by touching a grounded metal surface to prevent the generation of a spark.

• Ensure ALL personnel are educated and trained in ESD Control Procedures.

In general, exercise accepted and proven precautions normally observed when handling electrostatic
sensitive devices.

Wire resistance table Reference Manual

18 Wire resistance table

Distance
Feet (Meters)

AWG #20

0.5mm2

AWG #18

0.8mm2

AWG #16

1.0mm2

AWG #14

2.0mm2

100 (30.5)

1.02

0.64

0.40

0.25

200 (61)

2.03

1.28

0.80

0.51

300 (91.4)

3.05

1.92

1.20

0.76

400 (121.9)

4.06

2.55

1.61

1.01

500 (152.4)

5.08

3.20

2.01

1.26

600 (182.9)

6.09

3.83

2.41

1.52

700 (213.4)

7.11

4.47

2.81

1.77

800 (243.8)

8.12

5.11

3.21

2.02

900 (274.3)

9.14

5.75

3.61

2.27

1000 (304.8)

10.20

6.39

4.02

2.53

1250 (381)

12.70

7.99

5.03

3.16

1500 (457.2)

15.20

9.58

6.02

3.79

1750 (533.4)

17.80

11.20

7.03

4.42

2000 (609.6)

20.30

12.80

8.03

5.05

2250 (685.8)

22.80

14.40

9.03

5.68

2500 (762)

25.40

16.00

10.00

6.31

3000 (914.4)

30.50

19.20

12.00

7.58

3500 (1066.8)

35.50

22.40

14.10

8.84

4000 (1219.2)

40.60

25.50

16.10

10.00

4500 (1371.6)

45.70

28.70

18.10

11.40

5000 (1524)

50.10

32.00

20.10

12.60

5500 (1676.4)

55.80

35.10

22.10

13.91

6000 (1828.8)

61.00

38.30

24.10

15.20

6500 (1981.2)

66.00

41.50

26.10

16.40

7000 (2133.6)

71.10

44.70

28.10

17.70

7500 (2286)

76.10

47.90

30.10

19.00

8000 (2438.4)

81.20

51.10

23.10

20.20

9000 (2743.2)

91.40

57.50

36.10

22.70

10000 (3048)

102.00

63.90

40.20

25.30

June 2016 MAN-0081, Rev 5

Section 6: Wire resistance table

Resistance shown is o n e way. This figure must be doubled when determining closed loop resistance.

Reference Manual Specifications

Specifications 19

MAN-0081, Rev 5 June 2016

Section 7: Specifications

7.1 Electrical

7.1.1 Operating voltage

10 to 32 Vdc

7.1.2 Conduit entries

3 × ¾-in. NPT

7.1.3 Power consumption (JB-IR3SAR)

Nominal: 170 mA (1.7 W) @10 Vdc
Maximum: 275 mA (2.9 W) @ 10 Vdc

Nominal: 73 mA (1.8 W) @ 24 Vdc
Maximum: 117 mA (2.8 W) @ 24 Vdc

7.1.4 Relay contacts ( JB-IR3SAR)

5A at 30 Vdc/250 Vac
Form-C (SPDT), dry contacts

7.2 Environmental

7.2.1 Storage temperature

-67 °F to +185 °F (-55 °C to +85 °C)

7.2.2 Operating temperature

-67 °F to +185 °F (-55 °C to +85 °C)

-58 °F to +185 °F (-50 °C to +85 °C) – North American explosion-proof certification

7.2.3 Relative humidity

5–95% non-condensing

7.2.4 Metallurgy (housing)

Aluminum (AL6061)
Stainless steel (316)

7.2.5 Ingress protection

IP67
Type 4X

7.2.6 Weight

Aluminum: 2.0 lbs, 0.8 kg
Stainless steel: 3.5 lbs, 1.6 kg

7.3 Warranty

2 years

Certifications Reference Manual

20 Certifications

June 2016 MAN-0081, Rev 5

Section 8: Certifications

8.1 North America

Class I, Division 1, Groups BCD T5
Class I, Zone 1, Ex d IIB +H
Class I, Zone 1, AEx d IIB +H

-50 °C ≤ T
NEMA

≤ +85 °C

a

®

Type 4X/IP67

Special conditions for safe use:

1. Consult the manufacturer if dimensional information on the flameproof joints is necessary.

2. Follow the manufacturer’s instructions to reduce the potential of an electrostatic charging
hazard.

T5 (Canada)

2

T5 (United States)

2

Reference Manual Ordering information

Ordering information 21

Model

Description

Type

Performance

Housing

Enclosure material

MAN-0081, Rev 5 June 2016

Section 9: Ordering information

JB Multi-purpose termination box

IR3SAR 4–20mA Analog and Fire & Fault Relays (IR3S only)

MPD Digital Output (Gas Sensors & APM Only)
MPG General junction box
MPH Used to separate remote HART Port (order HPT-001 sepa r at e)
MPNS Analog & Digital Output - Test Jacks
MPR 4–20mA Analog and Fire & Fault Relays (UVS & UV/IRS only)
MPR3 R e l ay Out put (IR3S-R Only)
MPS Anal o g Output - Switch (for remote MVI testing) & Test Jacks (Flame Only)

A Aluminum
S Stainless Steel

Notes

EmersonProcess.com/FlameGasDetection

Americas
Emerson Process Management

Europe
Emerson Process Management AG

Middle East & Africa
Emerson Process Management

Asia Pacific
Emerson Process Management

© 2016 Emerson Process Management. A ll ri ghts reserv ed .

Reference Manual

MAN-0081, Rev 5

June 2016

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T [phone]
F [phone]

[e-mail]

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[e-mail]

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[e-mail]

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The Emerson logo is a trademark and servi ce mark of Emerson Electric Co.
Net Safety is a trademark of Emerson Process Ma nag ement.
HART is a registered trademark of the Fie ld Com m Group.
NEMA is a registered trademark and service mark of the National Electrical
Manufacturers Asso ci a ti on.
National Electrical Code is a registered tr ad ema rk o f N ati o nal Fire P ro tectio n
Association, Inc.
All other marks are the property of their respecti v e o wners.

The contents of this p ub l i ca t i o n a r e p re sented for informati on purposes only, and
while effort has been made to ensure thei r accuracy, they are not to be construed
as warranties or guarantees, express or im pl i ed, reg a rdi ng the pro d ucts or services
described herein or their use or appl icab i l ity . A l l sa les are gov erned by o ur terms
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