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MILLENNIUM
Oxygen Gas Detector
User Manual
Models:
MLP-A/AR/AD-ST1400-25
&
(all available options)
Part Number: MAN-0060 Rev 04
August 2008
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Net Safety Monitoring Inc Warranty IMPORTANT INFORMATION Net Safety Monitoring Inc., warrants its ST1400 sensor against defective parts This manual is for informational purposes only. Although every effort has been and workmanship for a period of 6 months from date of purchase; other made to ensure the correctness of the information, technical inaccuracies may electronic assemblies for 36 months from date of purchase. occur and periodic changes may be made without notice. Net Safety Monitori
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Net Safety Monitoring Inc MODBUS Termination ....................................................................................9 TABLE OF CONTENTS Figure 11: Modbus Termination Jumpers ................................................................9 Important Information Step 4 — Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Warranty Figure 12: Controller Functionality ........................................................................10 Contac
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Net Safety Monitoring Inc Outputs ........................................................................................................... 18 Relays - Optional ................................................................................................. 18 Modbus ................................................................................................................ 18 Current .........................................................................................................
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Net Safety Monitoring Inc. INTRODUCTION The Millennium series is Net Safety's latest innovation in a line of continuously evolving industrial gas detectors and sensors. The microcontroller based system Step 1 — PLAN provides fast, accurate and continuous monitoring of gases in extreme environments. Step 2 — INSTALL THE PRODUCT Step 3 — WIRE The Sensor Step 4 — OPERATE The electrochemical sensor is a proven design ensuring an accurate and repeatable response within a detection range of 0 to 25% o
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Net Safety Monitoring Inc Figure 1: Locate Sensor/Controller STEP 1 — PLAN LOCATE CONTROLLER/SENSOR Prior to the installation process, a location plan for placing the Controller and Sensor should be developed. Although there are no absolute rules for determining the quantity and location of a sensor or controller, the following points should be considered when planning the installation. Conduit to Controller • Locate the Controller where it will be accessible and visible. • Oxygen deficiency can
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Net Safety Monitoring Inc. Figure 2: Dimensional Drawings STEP 2 — INSTALL 5.68” 5.60” (144.3 mm) (142.2 mm) UNPACK Carefully remove all components from the packaging. Check components 4.06” against the enclosed packing list and inspect all components for obvious 5.31” (103.1 mm) damage such as broken or loose parts. (134.9 mm) If you find any components missing or damaged, notify the representative or Net Safety Monitoring immediately. 10.51” (267.0 mm) Figure 3: Components Controller Housin
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Net Safety Monitoring Inc Mount SEAL • Water-proof and explosion-proof conduit seals are recommended to prevent The Controller is usually mounted near eye-level and be easily accessible for water accumulation within the enclosure. calibration and maintenance purposes. The Sensor should be placed where O2 may build up or where other gases are likely to build up and displace O2. • Seals should be located as close to the device as possible and not more than 18 inches (46 cm) away. Ensure all device
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Net Safety Monitoring Inc. Board Assembly There are three different fixed boards, two optional relay boards and an optional Modbus board which make up the PCB Assembly. Depending upon requirements, either a Electromechanical or Solid State Relay Board module can be used. Boards are field replaceable. Simply loosen the three locking standoffs, remove one board, insert the other board and tighten screws. Note: Boards are susceptible to ESD. Refer to Appendix A, "Electrostatic Sensitive Device (ESD
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Net Safety Monitoring Inc Figure 5: Wiring—Controller and Sensor SENSOR AND CONTROLLER WARNING: Terminal Board Power to the unit must be OFF before wiring. Note: The Sensor may be factory installed to the Controller. If so, you need only connect the Power Terminals. RST 1. Remove the Controller’s Housing Cover. +24V 2. Connect the Sensor to the Sensor Terminals (if necessary) and the Output Power COM Terminals to the output signal wires. Terminals RST 4-20 +24V ISO Table 1: Controller/Sensor Con
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Net Safety Monitoring Inc SENSOR SEPARATION Figure 6: Wiring—Sensor Separation Terminal Board Power To designated terminal board Terminals* and oxygen sensor. See MAN-0081 RST Multi-purpose Junction Box manual +24V COM 4-20 ISO Red Modbus RTU Blk Terminals to PLC* Shld Sensor Terminals* Sensor Board As the Sensor must be located in one location and the Controller in a location Ensure that the appropriate wire is used for Class 1/Division 1 hazardous where it can be easily reached, it is often ne
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Net Safety Monitoring Inc Current Output NON-ISOLATED/ISOLATED WIRING To set an isolated current output, simply move the Jumper (shorting jack) to the Terminal Connection isolated current position (refer to Figure 9, "Jumper Positions", on page 8). Figure 7: Non-isolated Terminal Connection Note: Unless otherwise specified, all models ship with non-Isolated current output. Terminal Board Figure 9: Jumper Positions Power Terminal Strip Jumper—Position Jumper Terminal Board (shorting jack) over pi
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Net Safety Monitoring Inc REMOTE RESET The Millennium can be set for remote reset. A normally open Push Button Switch must be connected between the RST and the COM terminals on the Terminal Board and the Relay Option Latch Status must be set to Latching . Figure 10: Remote Reset RST +24V Terminal Board COM PowerTerminal Strip 4-20 ISO MODBUS TERMINATION Devices are networked in a daisy chain. The device located at the end of the chain requires end of line termination. Place both jumpers over the
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Cal/Reset Magnet On Side Net Safety Monitoring Inc. STEP 4 — OPERATE The Controller faceplate contains most functional elements of the user interface. Below is a description of that functionality. Figure 12: Controller Functionality Scrolling 8-character display - provides various status messages and prompts. Refer to "Status LEDs, Magnetic Reed Switch - provides non-intrusive access for Display Messages and Current Pull Here knob - unscrew the two programming, calibrating and resetting. Loop" o
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Net Safety Monitoring Inc RTU Registers Table 2: Status LEDs, Display Messages and Current Loop Register 40001 = % output (read only) Status LED Register 40002 = RTU Status (read only) State Current O/P RED or GREEN Display Register 40101 = Reset latched relays (write) Options 3.0 mA n/a n/a Review/Settings Table 3: RTU Status Register (40002) Read Only (Binary) Standard level of Blip/ RTUstat_fault 0x0001 (fault sensor...) 17.4 mA 20.9 %O2 Oxygen present blink RTUstat_low_alarm 0x0002 low alarm
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Net Safety Monitoring Inc Magnetic Reed Switch THE MAIN MENU The Magnetic Reed Switch is provided to avoid opening the Housing in an The Main Menu provides access to various functional settings and viewing of environment where gas may be present. The Magnetic Reed Switch functions in current settings. the same manner as the Calibration Button but in a non-intrusive manner. Refer • Calibrate Sensor - Calibrate sensor. to Figure 12, "Controller Functionality", on page 10 for more information. • Re
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Net Safety Monitoring Inc. STEP 5 — CALIBRATE CALIBRATION PROCEDURE WARNING: The calibration procedure requires about 5 minutes to complete. If gas is not applied at the appropriate time, a calibration failure may occur (refer to "Calibration Failure" on page 14 for specific information). For accurate performance, the concentration of gas, corresponding to 0 to 25% oxygen is converted to a linear 4 to 20 mA output signal which can be poweredfrom the primary dc supply of the instrument. Power up
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Net Safety Monitoring Inc Calibration Failure STEP 6 — MONITOR If the calibration procedure fails, the display shows Fail Cal , the Status LED alternates Red and Green flashes and the analog output changes back and forth REVIEW RELAY SETTINGS from 3.0 to 3.3 mA. The unit remains in a failed state until manually reset. After the Manual Reset, This is a read-only mode; changes cannot be made. the unit will return to normal operation based on previous calibration values. Step 1: Press and hold the
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Net Safety Monitoring Inc. RELAY OPTIONS Setting Relay Options There are two settings for Relay Options: Low and High. The Fault Relay is Use to set the alarm level, coil status and latch status for the Low and High fixed as Energized/Non-latching and cannot be changed. The low alarm level, relays (Fault Alarm is fixed). coil energization and latch status for low alarm are set first; high alarm level, The following table describes the default settings for the sensor. coil energization and latch
