MSA SMC Sentry-IT NEMA Retrofit Kit User manual

Operating Manual
SMC Sentry-IT NEMA Retrofit Kit
Document No./Revision:T12022/A3
Print Spec: 10000005389 (F)
MSAsafety.com

© MSA 2021. All rights reserved
WARNING!
Read this manual carefully before using or maintaining the device. The device will perform as designed only if it is used and
maintained in accordance with the manufacturer's instructions. Otherwise, it could fail to perform as designed, and persons
who rely on this device could sustain serious injury or death.
The warranties made by MSA with respect to the product are voided if the product is not installed and used in accordance
with the instructions in this manual. Please protect yourself and your employees by following the instructions.
Please read and observe the WARNINGS and CAUTIONS inside. For additional information relative to use or repair, call
1-800-MSA-2222 during regular working hours.
MSA is a registered trademark of MSA Technology, LLC in the US, Europe and other Countries. For all other trademarks
visit https://us.msasafety.com/Trademarks.
MSA Safety
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Milpitas, CA 95035
U.S. Support Information:
[phone]
[phone]
Email: [email protected]
EMEA Support Information:
[phone]
Email: [email protected]
For your local MSA contacts, please go to our website www.MSAsafety.com

Contents
1 Product Description 4
2 Tools and Hardware 5
2.1 Tools Needed 5
2.2 Parts Included with P00018 Hardware 5
3 Replacement Instructions 6
4 Specifications 8
5 Installation Drawings 9
6 Limited 2 Year Warranty 11
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1 Product Description
The Sentry Gas Risk Management System was ahead of its time from the very beginning. Sentry was first to have digital
two-way communication between the controller and the sensor, first to offer multiplexing capability to reduce installation
costs, first to incorporate Modbus output to interface to plant-wide systems, first to offer a browser based interface and
more. However modern technology has resulted in smarter sensors and greater demand for extensive data management
and alarming. While that trustworthy controller has been protecting your plant and personnel for many years, it is time to
consider an upgrade. The new Sentry IT Controller meets the needs of today’s demanding instrumentation and systems
engineer.
• Easy to convert the classic Sentry controller to Sentry IT in just a few hours
• Simultaneous interface via analog 4-20 mA, RS-485 Modbus RTU, Relay contact and PSG/SentryBus
• Scalability with space to add additional I/O blocks to expand capability
• Intuitive operator interface with the color touch panel display with menu-driven prompts to reduce the learning curve
• Multiple power options of AC, DC, or AC with DC backup
• User configurable alarm logic including menu driven configuration and integral Commander Logic to allow the user to
develop comprehensive alarm logic schemes
• Easy interface to plant-wide systems utilizing various protocols including Modbus TCP/IP, EtherNet/IP, BACnet and
more
MSASafety offers Sentry NEMA systems to easily upgrade to a Sentry IT System, enhancing your gas safety with modern
technology. You get to keep your installed sensors and there is no need to run new wires. This provides you with additional
functionality not found in your current system including additional sensor capability (while maintaining same compact
design), Modbus communications, additional outputs and web browser interface. The retrofit only takes a few simple tools
and about an hour or two of time.
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2 Tools and Hardware
2.1 Tools Needed
• Open Wrench
• 1/2 Socket Wrench
• 7/16 Nut Driver
• 5/16 Nut Driver
• Screwdriver
• Small Flat Screwdriver
2.2 Parts Included with P00018 Hardware
Part No. Description Quantity
61150 Screw Seal 10-32 x 1.25 SHMS SST x4
62011 Washer #10 Flat x4
63088 Standoff 10-32 x 9/16 5/16 Hex AL x4
61036 Screw 10-32 x 3/8 PHMS Blo x4
61048 Screw 10-32 x 3/8 PHMS Zinc x2
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3 Replacement Instructions
Follow the steps below to upgrade to the Sentry-IT NEMA Retrofit:
1. Remove items from the box: Front Panel, Rear Panel, Bracket and Instruction Manual.
2. Turn OFF Sentry power and unplug AC power cord.
3. Remove green connectors from PSG/SentryBus board on new front panel.
4. Open the latch at the Right side of the enclosure.
5. Open the door of the enclosure.
6. Disconnect the 3 wires from each sensor and connect to the green
connectors removed in step 3.
7. Disconnect the AC power.
8. Unscrew the 2 black screws on the hinge at the Left side of the Sentry
panel.
9. Remove 4 nuts at the Right side of the hinge panel. (use 5/16 nut driver)
10. Take the panel out of the enclosure.
11. Remove the hinge panel out of the enclosure.
12. Remove existing standoffs (x4), existing washers (x4), existing screws (x4) at the
Right side of the enclosure.
13. Insert screw 61150 SST (x4) on each hole from outside of the enclosure, washer
62011(x4) from inside the enclosure, standoff 63088 (x4) from inside the enclosure.
Make sure the screws are tightened. (Use screw driver and open wrench).
14. Remove the 2 Long Standoffs at the Left side panel. Retain these 2 Long Standoffs
for later use. (Use ½ socket wrench).
15. Put the Retrofit Rear Panel back to the enclosure and re-insert the 2 Long
Standoffs on the left side.
16. Install screw zinc 61048 (x2) at the right side top and bottom of the Right Rear panel.
17. Re-mount the black bracket 39229 with screw blo 61036 (x2) on top of the 2 Long Standoffs.
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18. Fasten the hinge of the new front panel to 4 bolts by using the nuts previously
removed from the original hinge.
19. Connect the 2 cable wires from the Front panel to the Rear panel:
a. Red wire – TB1-3
b. Black wire – TB1-6
20. The Small Blue shorter ribbon connector (Assembly Harness) connects to the
white connector on top of the Rear board at stack 1.
21. The long Blue ribbon connector (Assembly Harness) connects to the white
connector at stack 2 (IF APPLICABLE).
22. The Black ribbon connector is only used for 4-20mA output at the top board.
23. Plug the connectors from step 6 back in to the terminal block. (Make sure all
connectors are hooked up with the correct PSG [Power Signal Ground]).
24. Re-connect the alarm reset switch wires on each side and snap back to
lock the switch to its original position.
25. Connect power cord:
a. Green color – Ground “G”
b. White color – Neutral “F3” (N)
c. Black color – “F2” (H)
26. Use Ty-Wrap to straighten all the wiring.
27. To close the Front panel, insert screw Blo 61036 (x4) at the Left side
panel (use screwdriver).
28. Turn ON power to activate.
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4 Specifications
Power
AC Version 120/240 VAC +/- 10%, 50/60 Hz
DC Version 24VDC Nominal (18-30 VDC)
Power Consumption Controller 50W, Typical max system 200W
Battery Backup Capacity External Option
Environmental
Operating Temperature 14 to 131°F (-10 to 55°C) *
Check with factory for applications outside of 32 to 122°F (0 to 50°C)
Storage Temperature -4 to 140°F (-20 to 60°C)
Relative Humidity 0-95% Non-condensing
Operator
Interface
Type 5.7” color, backlit touch-screen
Environmental Rating NEMA 4
Views Bar charts, text data display, configuration settings
Other Indicators Integral long-life, high-intensity LED lights for Safe, Warning, Alarm and
Trouble
Supervisory
Connection
Controller to Ethernet Modbus TCP or AllenBradley Ethernet/IP (other protocols available)
Optional - Remote
Managemet Web browser interface
Optional - Mass Storage Flash Drive via USB port
Connectivity
to Modules
Channels Up to 32 module addresses
Channel Power 24 VDC
Analog 4-20 mA 2, 3, or 4-wire per ISA specifications
Modbus RTU (Sentry IT) RS-485 (half-duplex); Baud=; Parity=None; Stop bit=1; Data bits=8; Flow
control=None
SentryBus Proprietary Power, Signal, Ground (PSG)
Binary Input Supervised or Digital Input
Output
4-20 mA Variable retransmission 3-wire or 4-wire
Relay Programmable, SPDT (multiples of 8)
Standard 5 Amps
Optional 8 Amps
Trouble 5 Amps, Fail-safe
Enclosure Design Wall-mount
Warranty 2 Year Limited Warranty
(Specifications subject to change without notice)
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5 Installation Drawings
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6 Limited 2 Year Warranty
MSA Safety warrants its products to be free from defects in workmanship or material under normal use and service for two
years after date of shipment. MSA Safety will repair or replace any equipment found to be defective during the warranty
period. Final determination of the nature and responsibility for defective or damaged equipment will be made by MSA Safety
personnel.
All warranties hereunder are contingent upon proper use in the application for which the product was intended and do not
cover products which have been modified or repaired without MSA Safety’s approval or which have been subjected to
accident, improper maintenance, installation or application; or on which original identification marks have been removed or
altered. This Limited Warranty also will not apply to interconnecting cables or wires, consumables or to any damage
resulting from battery leakage.
In all cases MSA Safety’s responsibility and liability under this warranty shall be limited to the cost of the equipment. The
purchaser must obtain shipping instructions for the prepaid return of any item under this warranty provision and compliance
with such instruction shall be a condition of this warranty.
Except for the express warranty stated above, MSA Safety disclaims all warranties with regard to the products sold
hereunder including all implied warranties of merchantability and fitness and the express warranties stated herein are in lieu
of all obligations or liabilities on the part of MSA Safety for damages including, but not limited to, consequential damages
arising out of/or in connection with the use or performance of the product.
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