Net Safety JB Series Junction Box
Reference Manual
Part Number: MAN-0081, rev. 4
Release: July 2014
Important Instructions
Installing, operating or maintaining a Net Safety Product improperly could lead to serious injury
or death from explosion or exposure to
the product, in this manual, and in any local and national codes that apply to the product. Do
not allow untrained personnel to work with this product. Use Net Safety parts and work
procedures specifi
Net Safety Monitoring, Inc (Net Safety) designs, manufactures and tests products to function within
specific conditions. Because these products are sophisticated technical 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.
dangerous substances. Comply with all information on
ed in this manual.
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
guarantees, 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 purpose with respect to this manual and, in no event, shall Net Safety be liable
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 of third parties.
Product names used herein are for manufacturer or supplier identification only and may be
trademarks/registered trademarks of these companies.
Net Safety and the Net Safety logo are registered trademarks of Net Safety Monitoring, Inc. The
Emerson logo is a trademark and service mark of the Emerson Electric Company.
Copyright © 2014 by Net Safety Monitoring, Inc., Calgary, Alberta, Canada
All rights reserved. No part of this work may be reproduced or copied in any form or by any means graphic, electronic, or mechanical without first receiving written permission of Net Safety Monitoring, Inc,
Calgary, Alberta, Canada.
Warranty
1. Limited Warranty. Subject to the limitations contained in Section 10 (Limitation of Remedy
and 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
use and care; 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 against defective parts and workmanship as per Section
Products purchased by Seller from a third party for resale to Buyer (Resale Products) shall
carry only the warranty extended by the original manufacturer. 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 repairs necessitated by inadequate maintenance; normal 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 replaced by Seller during the warranty period shall be in warranty
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 hereunder in a safe and reasonable
manner and in 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
MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR ANY OTHER MATTER WITH
RESPECT TO ANY OF THE GOODS OR SERVICES.
7.3.
2. Limitation of Remedy and Liability. SELLER SHALL NOT BE LIABLE FOR DAMAGES CAUSED
BY DELAY IN PERFORMANCE. THE REMEDIES OF BUYER SET FORTH IN THE AGREEMENT ARE
EXCLUSIVE. IN NO EVENT, REGARDLESS OF THE FORM OF THE CLAIM OR CAUSE OF ACTION
(WHETHER BASED IN CONTRACT, INFRINGEMENT, NEGLIGENCE, STRICT LIABILITY, OTHER
TORT OR OTHERWISE), SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS
EXCEED THE PRICE TO BUYER OF THE SPECIFIC GOODS MANUFACTURED OR SERVICES
PROVIDED BY SELLER GIVING RISE TO THE CLAIM OR CAUSE OF ACTION. BUYER AGREES
THAT IN NO EVENT SHALL SELLER’S LIABILITY TO BUYER AND/OR BUYER’S CUSTOMERS
EXTEND TO INCLUDE INCIDENTAL, CONSEQUENTIAL OR PUNITIVE DAMAGES. THE TERM
“CONSEQUENTIAL DAMAGES” SHALL INCLUDE, BUT NOT BE LIMITED TO, LOSS OF
ANTICIPATED PROFITS, REVENUE OR USE AND COSTS INCURRED INCLUDING WITHOUT
LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF BUYER’S CUSTOMERS.
Reference Manual Table of Contents
MAN-0081, Revision 4 July 2014
Contents
Section 1 : Introduction ....................................................................... 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 ............................................................................................. 6
2.5 Installation checklist .......................................................................................................... 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: UVS-AR, and UV/IRS-AR ........................................................................... 8
3.1.3 Models: IR3S-A ..................................................................................................... 8
3.1.4 Models: IR3S-D ..................................................................................................... 9
3.1.5 Models: IR3S-AD ................................................................................................... 9
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 series ............................................... 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 Shield ST7 toxic sensor series ......................................... 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
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Reference Manual
July 2014 MAN-0081, Revision 4
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 ............................................................................................................... 20
7.3 Warranty .......................................................................................................................... 20
Section 8 : Certifications .................................................................... 21
8.1 North America ................................................................................................................. 21
8.2 ATEX ................................................................................................................................ 21
8.3 IECEx ................................................................................................................................ 21
Section 9 : Ordering information ....................................................... 22
II Table of Contents
Reference Manual
MAN-0081, Revision 4 July 2014
Section 1: Introduction
1.1 Models covered
The Net Safety JB series junction box is a multi-purpose junction box that is used with numerous Net
Safety products. It can be used as a termination box for flame detectors or for remote mounting gas
sensors from transmitters. It is available in copper-free Aluminum or 316 Stainless Steel.
Models covered:
• JB-IR3SAR - Used with IR3S-AR flame detectors to provide 4-20mA 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 junction box used to separate Millennium toxic (ST2), Millennium combustible
(SC1100), and Gas Shield sensors from their transmitter
• JB-MPH - Used to separate the HART Port (HPT-001) from the HART device
• JB-MPNS - Used with the IR3S-A, UVS-A, and UV/IRS-A flame detectors and separated Millennium
toxic sensors (ST1); includes 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 representative or by contacting the Net Safety Technical Support
department at +1 866 347 3427 or safety.csc@emerson.com
.
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July 2014 MAN-0081, Revision 4
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 +1866 347 3427 or e-mail
safety.csc@emerson.com
On the return of the equipment, include the following information:
1. MRA number provided to you by Net Safety
2. Company name and contact information
3. Purchase order, from your company, authorizing repairs or request for quote
4. Ship all equipment, prepaid to:
Net Safety Monitoring
2721 Hopewell Place NE
Calgary, Alberta, Canada T1Y 7J7
5. Mark all packages with as Return for Repair and include 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. Collect shipments will not be accepted.
for a Material Return Authorization (MRA) number.
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.
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MAN-0081, Revision 4 July 2014
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 such as broken 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-14NPT, ¾ inch-14
NPT, or M20 x 1.5 mm thread. The standard offering is ¾ inch NPT, consult your Emerson Process
Management/Net Safety representative for 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 6mm 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.
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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 making contact
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
Prior to touching the painted enclosure surface
metallic labels, dispel any charge in your
body or equipment by touching a grounded metal surface to prevent the generation of a spark.
Installation shall be in
Code
The use of shielded cable is highly recommended to protect against interference caused by
ext
c
so by use of tools.
In applications where the wiring is installed i
other electrical equipment.
The junction box may be susceptible to ESD. Refer to
handling of this equipment.
The temperature rating of the wires connected to the junction box must be greater than 100°C
(212°F)
To fully avoid any environmental exposure, the use of seals is recommended, especially for
installations that use high
July 2014 MAN-0081, Revision 4
2.4 Wiring
the sensor has been removed.
or non-
2.4.1 Device separation distance
2.4.2 Seals
®
, ANSI/NFPA 70, the Canadian Electrical Code C22.1, or EN60079-14, as applicable.
raneous electrical or electromagnetic ‘noise’. To meet EN/IEC61326 EMC requirements, multi-
onductor braid shield cable is recommended. Connection of conduit or cable glands should be done
The maximum separation distance between the junction box and the connected device is limited by
the resistance of the connected wiring, which is a function of the gauge of the wire being used. Net
Safety recommends that separation must not exceed 2000 feet (610 meters) while using 16AWG
(1.31mm
more than 150 feet (46 meters). Refer to Section 6 for wire gauges and resistance values.
2
) wire. The Net Safety Millennium SC1100 combustible sensor should not be separated
accordance with the manufacturer's instructions and the National Electrical
n conduit, the conduit must not be used for wiring to
Section 5 for further information on proper
4
Water-proof and explosion-proof conduit seals are recommended to prevent water accumulation
within the enclosure.
-pressure or steam cleaning devices in proximity to the junction box
Reference Manual
Field maintenance or servicing on the
concerns
Do not open
when an explosive atmosphere may be present
removed.
Prior to touching the painted enclosure surface or non
body or equipment by touching a grounded
MAN-0081, Revision 4 July 2014
Seals should be located as close to the device as possible and not more than 18 inches (46cm) away;
seal all conduits within 18 inches (46cm). Consult the local electrical code for specific requirements.
Explosion proof installations may require an additional seal where the conduit enters a nonhazardous area. Ensure conformity with local wiring codes.
When pouring a seal, use 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 recommendations.
The jacket and shielding of the cable should be stripped back to permit the seal to form around the
individual wires. This will prevent air, gas, and water leakage through the inside 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 temperature and barometric 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 breathing.
Threaded connections on the enclosure between the housing and conduit pipe need to be sealed
with thread tape, such as Teflon tape, or something similar.
The conduit openings are gauged using an L-1 gauge to +½ to 2 turn tolerance.
junction box is not recommended. If there are any issues,
, or warranty information required, please contact Net Safety.
2.4.3 Terminal block connections
the transmitter, sensor, or junction box enclosure when in a classified area or
metal surface to prevent the generation of a spark.
When connecting cable wires, 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
unless the power to the sensor has been
-metallic labels, dispel any charge in your
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Internal Ground Lug
External Ground Lug
Crimp Connector
July 2014 MAN-0081, Revision 4
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.
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 has
been completed:
□ Ensure that the junction box is properly and firmly mounted
□ Ensure that stopping plugs are securely tightened on any unused conduit entries
□ 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)
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In the following drawings, the f
d
the
connectors.
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
4-20mA
Power and output wiring
Terminal
Function
1 (GND)
Earth ground
2
Not used
3
Not used
4
MVI 5 Vdc (+)
6
COM (-)
7
4-20mA
Meter test jacks
MVI test switch (JB-MPS only)
JB-MPS-A/S or JB-MPNS-A/S
MAN-0081, Revision 4 July 2014
Section 3: Terminal board configurations
There are multiple terminal board configurations facilitated by the JB series junction box. This allows
effective, safe, and accurate terminations and sensor separation requirements across the Net Safety
product line. These configurations are outlined below.
Each model of the multi-purpose junction box contains a PCB with different components for features
that are applicable to specific models of Net Safety products, such as meter test jacks or a magnetic
switch. Please refer to the specific transmitter, detector, or sensor manuals for detailed instructions
about using these options.
3.1 Flame detection
lame detector wiring side refers to wiring between the flame
etector and the junction box terminals. Panel/PLC/DCS/RTU wiring side refers to wiring between
power source and the junction box. Wiring should be done according to the designated terminal
3.1.1 Models: UVS-A, and UV/IRS-A
Note: Shield should be terminated
at the Panel/PLC/DCS/RTU
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Flame detector wiring
Terminal
Color
Function
B
Blue
Manual Vi/MVI
R
Red
4-20mA Signal
BLK
Black
COM (-)
W
White
Vdc (+)
Green
Earth Ground
Power and output wiring
Terminal
Function
RRst
Remote Reset
MVI
Manual VI
SIG
4-20mA 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
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
4-20mA
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
Meter test jacks
JB-MPNS-A/S
July 2014 MAN-0081, Revision 4
3.1.2 Models: UVS-AR, and UV/IRS-AR
at the Panel/PLC/DCS/RTU
3.1.3 Models: IR3S-A
Note: Shield should be terminated
at the Panel/PLC/DCS/RTU
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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
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
4-20mA
Power and output wiring
Terminal
Function
1 (GND)
Earth ground
2
Vdc (+)
3
COM (-)
4
A (Communication)
5
B (Communication)
6
ISO (+)
7
4-20mA
Meter test jacks
JB-MPNS-A/S
Note: Shield should be terminated
MAN-0081, Revision 4 July 2014
3.1.4 Models: IR3S-D
Note: Shield should be terminated
at the Panel/PLC/DCS/RTU
3.1.5 Models: IR3S-AD
at the Panel/PLC/DCS/RTU
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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 should be terminated
July 2014 MAN-0081, Revision 4
3.1.6 Models: IR3S-R
at the Panel/PLC/DCS/RTU
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DIP Switch
Flame detector wiring (J1)
Terminal
Color
Function
1 (GND)
Green
Earth ground
2
Red
Vdc (+)
3 Not used
4
Black
COM (-)
5
Purple
ISO (+)
6
Yellow
4-20mA
Power and output wiring (J2)
Terminal
Function
1
Reset
2
4-20mA
3
ISO (+)
4
COM (-)
5
Not used
6
Vdc (+)
JB-IR3SAR-A/S
Relay wiring
Terminal
Relay
Contact state
1
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, Revision 4 July 2014
3.1.7 Models: IR3S-AR
Note: Shield should be terminated
at the Panel/PLC/DCS/RTU
By default the Fault relay is fixed as Energized and Non-latching and cannot be changed. The default
setting for the Alarm relay 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.
Fault
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In the following drawings, the
and
and
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 should be terminated
July 2014 MAN-0081, Revision 4
3.2 Gas detection
sensor wiring side refers to the wiring between the gas transmitter
the junction box terminals. The transmitter wiring side refers to wiring between the transmitter
the junction box terminals.
3.2.1 Models: Millennium II ST3 and SC3 sensor series
at the Panel/PLC/DCS/RTU
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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
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 should be terminated
MAN-0081, Revision 4 July 2014
3.2.2 Millennium SIR100 and APM
Note: Shield should be terminated
at the Panel/PLC/DCS/RTU
3.2.3 Millennium ST1 toxic sensor series
at the Panel/PLC/DCS/RTU
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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 should be terminated
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
July 2014 MAN-0081, Revision 4
3.2.4 Millennium SC1 combustible sensor series
at the Panel/PLC/DCS/RTU
3.2.5 Millennium ST2 & Gas Shield ST7 toxic sensor series
Note: Shield should be terminated
at the Panel/PLC/DCS/RTU
14
Reference Manual
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 should be terminated
HART Port connector
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 should be terminated
MAN-0081, Revision 4 July 2014
3.3 Common junction boxes
3.3.1 HART Port remote connection box (JB-MPH-A/S)
Millennium II transmitter or
at the Panel/PLC/DCS/RTU
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)
15
at the Panel/PLC/DCS/RTU
Reference Manual
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
3/4” to M20 certified conduit reducer - aluminum
M20R
3/4” to M20 certified conduit reducer - stainless
M20R-SS
3/4” NPT certified conduit plug - aluminum
CP-AL-002
3/4” NPT certified conduit plug - stainless
CP-SS-001
1” pipe mounting bracket (stainless steel)
UN-MK-31
2” pipe mounting bracket (stainless steel)
UN-MK-32
3” pipe mounting bracket (stainless steel)
UN-MK-33
July 2014 MAN-0081, Revision 4
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, please contact
Net Safety’s technical support department first by phone to try and resolve any issues. If issues
cannot 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
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Reference Manual
MAN-0081, Revision 4 July 2014
Section 5: Electrostatic sensitive device
Definition: Electrostatic discharge (ESD) is the transfer, between bodies, of an electrostatic charge
caused by direct contact or induced by an electrostatic field.
The most common cause of ESD is physical contact. 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 instantaneous 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 sides —taking care not to touch electronic components.
• Wear grounded wrist or foot straps, ESD shoes or heel grounders to dissipate unwanted static
energy.
• Prior to handling boards, dispel any charge in your body or equipment by touching a grounded
metal surface.
• Ensure all components are transported and stored in ESD safe packaging.
• When returning boards, carefully package in the original carton and static protective wrapping.
• 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 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.
17
Reference Manual
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
July 2014 MAN-0081, Revision 4
Section 6: Wire resistance table
Distance
Feet (Meters)
AWG #20
0.5mm2
AWG #18
0.8mm2
AWG #16
1.0mm2
AWG #14
2.0mm2
18
Resistance shown is one way. This figure must be doubled when determining closed loop resistance.
Reference Manual
MAN-0081, Revision 4 July 2014
Section 7: Specifications
7.1 Electrical
7.1.1 Operating voltage
10 to 32 Vdc
7.1.2 Conduit entries
3 x 3/4” NPT
7.1.3 Power consumption (JB-IR3SAR)
Nominal: 170mA (1.7W) @10Vdc
Maximum: 275mA (2.9W) @ 10Vdc
Nominal: 73mA (1.8W) @ 24Vdc
Maximum: 117mA (2.8W) @ 24Vdc
7.1.4 Relay contacts (JB-IR3SAR)
5A at 30Vdc/250Vac
Form-C (SPDT), dry contacts
7.2 Environmental
7.2.1 Storage temperature
-55°C to +85°C (-67°F to +185°F)
7.2.2 Operating temperature
-55°C to +85°C (-67°F to +185°F)
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
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Reference Manual
July 2014 MAN-0081, Revision 4
7.2.6 Weight
Aluminum: 2.0lbs, 0.8kg
Stainless steel: 3.5lbs, 1.6kg
7.3 Warranty
2 years
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Reference Manual
MAN-0081, Revision 4 July 2014
Section 8: Certifications
8.1 North America
Class I, Division 1 Groups B,C, D T5
Class I, Zone 1 Ex d IIB +H
Class I, Zone 1 AEx d IIB +H
-55°C ≤ Ta +85°C
NEMA Type 4X/IP67
8.2 ATEX
0575 II 2G Ex d IIB+H2 T5 Gb
-55°C ≤ Ta + 85°C
IP67
FM07ATEX0044
T5 (Canada)
2
T5 (United States)
2
8.3 IECEx
Ex d IIB+H2 T5
-55°C ≤ Ta + 85°C (sensor dependent)
IP67
IEC 60079-0:2011 / IEC 60079-1:2007
IECEx FMG 14.0009X
Special conditions for safe use:
• Consult the manufacturer if dimensional information on the flameproof joints is necessary.
• Follow the manufacturer’s instructions to reduce the potential of an electrostatic charging
hazard.
21
Reference Manual
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
MPNS
Analog & Digital Output - Test Jacks
MPR
4-20mA Analog and Fire & Fault Relays (UVS & UV/IRS only)
MPR3
Relay Output (IR3S-R Only)
July 2014 MAN-0081, Revision 4
Section 9: Ordering information
Model Description
Type Performance
Housing Enclosure Material
MPH Used to separate remote HART Port (order HPT-001 separate)
MPS Analog Output - Switch (for remote MVI testing) & Test Jacks (Flame Only)
A Aluminum
S Stainless Steel
22
Reference Manual
MAN-0081, Revision 4 July 2014
Notes:
23
Emerson Process Management
www.emersonprocess.com/safety
MAN-0081
Revision 4
July 2014
Net Safety Monitoring Inc.
2721 Hopewell Place NE
Calgary, Alberta, Canada T1Y 7J7
T +1 (403) 219 0688
T +1 866 347 3427
F +1 (403) 219 0694
©2014 Emerson Process Management. All rights reserved.
Emerson Process Management, Rosemount Analytical, and Net Safety Monitoring are marks of Emerson Process Management group of companies. All
other marks are the property of their respective owners.
The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, 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 on request. We reserve the right to modify or improve the designs or specifications of
our products at any time without notice.
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