Honeywell Midas Operating Manual

Midas Gas Detector

Operating Instructions

• TOC

• General Description

• Product Overview

• Default Conﬁguration

• Installation

• Detector Start-up

• General Operation

• Navigating Menus

• Routine Maintenance

• Pyrolyzer Module Options

• LonWorks® Interface

• Troubleshooting/Faults

• Reﬂex

• Internal Web Server

• Installation Topologies

• Ordering Information

• Speciﬁcations

• Calibration/Bump Testing

• Modbus/TCP Interface

®

• Gas Tables

• Warranty

Midas® Gas Detector

Table of Contents

Contents 1 General Description

1 General Description �� 1-2

2 Product Overview

2 Product Overview �� 2-2

2�1 Main Chassis �� 2-2

2.1.1 Display ............................................................................................................ 2-2

2.1.2 Pump Module .................................................................................................. 2-3

2.1.3 Sensor Cartridge Chamber ............................................................................. 2-3

2�2 Mounting Bracket Assembly �� 2-3

2.2.1 Mounting Bracket ............................................................................................ 2-4

2.2.2 Terminal Module .............................................................................................. 2-4

2�3 Sensor Cartridge �� 2-4

2.3.1 Biased Sensor Cartridges ............................................................................... 2-4

2�4 Cover �� 2-5

3 Default Configuration

3 Default Configuration �� 3-2

4 Installation

4 Installation �� 4-2

4�1 Mounting and Location of Detector �� 4-2 4�2 Mechanical Installation �� 4-4 4�3 Sample and Exhaust Tubing Calculations �� 4-7 4�4 In-line Filters �� 4-8 4�5 Local Detector Option �� 4-8 4�6 Electrical Installation �� 4-8 4�7 Electrical Connections �� 4-11 4�8 Refitting the Main Chassis �� 4-23 4�9 Installing the Sensor Cartridge �� 4-23

5 Detector Start-Up Procedures

5 Detector Start Up Procedures �� 5-2

Midas Technical Handbook

i

Midas® Gas Detector

6 General Operation

6 General Operation �� 6-2

6�1 Normal Operation Mode �� 6-2

6.1.1 Resetting Alarms, and Faults .......................................................................... 6-4

6�2 Review Mode �� 6-4

6.2.1 Review Mode Menu Overview ................................................................... 6-4

6�3 Overview of Set-up, Calibration and Test Mode �� 6-6

6.3.1 Set-up Menu Overview .............................................................................. 6-6

6.3.2 Calibration Menu Overview ‘ CAL’ ......................................................................... 6-8

6.3.3 Test Menu Overview ‘ tESt’ ........................................................................ 6-9

7 Detailed Procedures for Navigating Mode Submenus

7 Detailed Procedures for Navigating Mode Submenus ��7-2

7�1 Review Mode �� 7-2

7.1.1 Review Software ‘SW’ ..................................................................................... 7-2

7.1.2 Review Alarms ‘ ALm’ .................................................................................. 7-2

7.1.3 Review Faults ‘ FLt’ ..................................................................................... 7-3

7.1.4 Review Calibration ‘ CAL’ ................................................................................ 7-3

7.1.5 Review Date and Time ‘timE’ ........................................................................... 7-3

7.1.6 Review Detector Address ‘ nEt’ ....................................................................7-3

7.1.7 Review Event Log ‘ Hi St’ .......................................................................... 7-4

7.1.8 Review LCD Backlight Mode ‘LCD’ ................................................................. 7-4

7�2 Set-up, Calibration and Test Modes �� 7-4

7.2.1 Set-up Menu ‘ SEt’ ........................................................................................ 7-5

7.2.2 Set Alarms ‘ ALm’ .......................................................................................... 7-5

7.2.3 Set Faults ‘ FLt’ .............................................................................................. 7-6

7.2.4 Set Calibration Interval ‘ CAL’ ......................................................................... 7-7

7.2.5 Set Date and Time ‘timE’ ................................................................................. 7-7

7.2.6 Set Address ‘ nEt’ ........................................................................................ 7-8

7.2.7 Set pass code ‘ PWd’ .................................................................................... 7-8

7.2.8 Set LCD Backlight mode ................................................................................. 7-9

Midas Technical Handbook

ii

Midas® Gas Detector

7.2.9 Set Pump control frequency ............................................................................ 7-9

7�3 Calibration Menu ‘ CAL’ �� 7-10

7.3.1 Zero Calibration ‘ 0CAL’ ................................................................................. 7-10

7.3.2 Span Calibration ‘ SPAn’ ............................................................................... 7-10

7.3.3 Flow Calibration ‘ FLoW’ ................................................................................ 7-11

7.3.4 mA Calibration ‘mA 4-20’ ............................................................................... 7-12

7�4 Test Menu ‘ tESt’ �� 7-13

7.4.1 Bump Test ‘ bUmP’ ....................................................................................... 7-13

7.4.2 Alarm/Fault Test ‘ SIm’ ................................................................................ 7-13

7.4.3 Inhibit State ‘ InH’ ....................................................................................... 7-14

7.4.4 Stimulate 4-20mA ‘4-20 mA’ .......................................................................... 7-14

8 Routine Maintenance

8 Routine Maintenance �� 8-2

8�1 Sensor Cartridge Replacement �� 8-3

8.1.1 Sensor Cartridge Fitting/Replacement ............................................................ 8-3

8�2 Pump Replacement �� 8-4 8�3 Reassembling the Detector �� 8-5 8�4 Filter Replacement �� 8-6 8�5 System Leak Check Procedure �� 8-7

9 Pyrolyzer Module Options

9 Pyrolyzer Module Options �� 9-2

9�1 Fitting the Pyrolyzer Module �� 9-4 9�2 Reassembling the Detector �� 9-6 9�3 Configuring the Detector �� 9-7 9�4 Replacing the Pyrolyzer Heater Block �� 9-7

10 Optional LonWorks® Interface Installation

10 Midas LonWorks® Interface Module �� 10-2

10�1 LonWorks® Installation �� 10-2

10.1.1 Fitting the LonWorks® Module .................................................................... 10-2

10.1.2 Wiring the Midas® for LonWorks® ............................................................... 10-3

10.1.3 Configuring the Midas® for LonWorks® ...................................................... 10-3

Midas Technical Handbook

iii

Midas® Gas Detector

10�2 LonWorks® Software �� 10-4

10.2.1 LonWorks® Overview ................................................................................... 10-4

10.2.2 Network Variable Behaviors ........................................................................ 10-5

10.2.3 Other Characteristics .................................................................................. 10-9

11 Troubleshooting and Fault Diagnosis

11 Troubleshooting and Fault Diagnosis �� 11-2

12 Reflex

12 REFLEX® �� 12-2

13 Internal Web Server

13 Internal Web Server �� 13-2

14 Typical Installation Topologies

14 Typical Installation Topologies �� 14-2

15 Ordering Information

15 Ordering information �� 15-2

16 Specifications

16 General Specifications �� 16-2

17 Calibration and Bump Testing

17 Calibration and Bump Testing �� 17-2

A Modbus® / TCP Interface

®

13�1 Physical Network Components �� 13-2 13�2 Internet Settings �� 13-2 13�3 Running the Web Browser �� 13-4

14�1 Conventional Installation �� 14-2 14�2 Modbus/TCP Installation �� 14-3 14�3 Power over Ethernet (PoE) Installation �� 14-3

15�1 Midas® Transmitter �� 15-2 15�2 Midas® Pyrolyzer for NF3 �� 15-2 15�3 Midas® High-Temperature Pyrolyzer for Perfluoro Compounds �� 15-2 15�4 Midas® LonWorks® Module �� 15-2 15�5 Midas® Complete Gas Detector Kits �� 15-3 15�6 Accessories and Spares �� 15-4

Midas Technical Handbook

iv

Midas® Gas Detector

A Modbus/TCP Interface ��A-2

A�1 Reading Status from the Midas® ��A-2 A�2 Sending Commands to the Midas® ��A-5

A�3 Determining the MAC Address ��A-6 B Gas Tables C Warranty Statement

C Warranty Statement ��C-2

Sensor Cartridge Warranty ��C-3

Pyrolyzer Warranty ��C-3

Midas Technical Handbook

v

Midas® Gas Detector

1 General Description

Midas Technical Handbook

1-1

Midas® Gas Detector

1 General Description

The Midas® gas detector is an extractive gas sampling system that draws a sample locally or from a remote point to a sensor cartridge that is located inside the detector’s chassis. A wide range of Asphyxiant, Toxic, Flammable, Pyrophoric, Corrosive, and Oxidizer (including Oxygen) gas sensor cartridges are available that enable detection of gases used or generated in the Semiconductor and other industries.

Midas® is wall mounted and displays gas concentration, alarm, fault and status information via its backlit LCD and LEDs. A simple to use 4-button keypad located under the display provides the facility to set-up, review, operate and make changes to the detector’s conﬁguration.

Midas® has ﬂexible power and communications capabilities built in as standard. These include 3 on board relays, 0-21 mA analog output, Modbus/TCP outputs for signal and service connectivity as well as the innovative Power over Ethernet (PoE) connection that enables a single Ethernet connection to be made for all power, control and communication requirements. An optional LonWorks® interface is available.

Midas Technical Handbook

1-2

Midas® Gas Detector

2 Product Overview

Midas Technical Handbook

2-1

Midas® Gas Detector

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2 Product Overview

The Midas® gas detector comprises of 4 parts: the main chassis, the mounting bracket assembly, the sensor cartridge and the unit cover. Diagram 2-1 details the Midas® general arrangement. Additionally, optional Pyrolyzer modules for the detection of NF3 or various PFCs and an optional LonWorks® module are available. Please refer to Section 9 and 10 respectively for details of these options.

Diagram 2-1� Midas® general arrangement exploded view

2�1 Main Chassis

The main chassis comprises of the display, pump assembly, and plug in sensor cartridge chamber.

Diagram 2-2� Main chassis

Service Port

Display

Pump module

Sensor cartridge chamber

Caution

The Service Port is only for use with approved connectors by Honeywell Analytics service personnel operating a system diagnostic� Unauthorized connection to this port may lead to damage of the Midas® and external equipment and will not be covered by the normal product warranty conditions�

2�1�1 Display

The display is located at the front of the main chassis and consists of a large alphanumerical and graphical backlit LCD, 3 LED indicators and a 4-button keypad. Under normal operation the LCD and LEDs display gas concentration, alarm and system status. In set-up, review, calibration and test modes, the LCD shows the relevant menu options. These menus are simply navigated using the ‘s’ up, ‘t’ down, ‘3’ accept and ‘X’ cancel buttons.

Midas Technical Handbook

2-2

Midas® Gas Detector

Diagram 2-3� Midas® display module layout

1

21

1

20

3

1

2

4

MDA Scientific Midas

1

16

18

1

17

19

1

5

7

1

6

8

1

12

14

1

13

15

2�1�2 Pump Module

1. Red alarm LED

2. Normal operation icon

3. Review mode icon

4. Green power LED

5. Set-up mode icon

6. Calibration mode icon

7. Yellow Fault LED

8. Test mode icon

9. Gas concentration and

1

9

1

10

1

11

message display area

10. Displayed units

11. Pass code icon

12. Accept button

13. Network icon

14. Down button

15. Inhibit icon

16. Fault icon

17. Up button

18. Alarm level 1 icon s Alarm level 2 icon (For ﬂammable and toxic)

Depletion level 1 icon t Depletion alarm level 2

19. Cancel button

20. Zero and Span calibration icons

21. Flow indicator

The pump module is located at the back of the main chassis. It draws the gas sample from the inlet port located at the bottom of the mounting bracket assembly via an inline ﬁlter to the sensor cartridge chamber located at the front of the main chassis. The inline ﬁlter is to protect the elements after the sensor. The sample goes from the inlet straight to the sensor face, and then through the rest of the ﬂow system. The sample is then exhausted via the exhaust port located at the bottom of the mounting bracket assembly. The pump and ﬁlter assemblies are designed for easy replacement. For replacement details refer to Sections 8.2 and 8.4 respectively.

2�1�3 Sensor Cartridge Chamber

The sensor cartridge chamber is located at the front of the main chassis below the display module. The plug in sensor cartridge is ﬁtted into this area which makes the electrical connection between the sensor cartridge and the rest of the electronics as well as providing the chamber where the sensor cartridge is exposed to the sampled gas. This connection is lightly lubricated for ease of sensor replacement. Avoid contact of sensor cartridge chamber with contaminants (such as dust and debris). For details of ﬁtting sensor cartridge refer to Section 4.9.

2�2 Mounting Bracket Assembly

The mounting bracket assembly comprises of the detector mounting bracket, the terminal module, the gas sample inlet and outlet ports, the cable/conduit entry and Ethernet (Modbus/TCP) communications socket.

Diagram 2-4� Mounting bracket assembly

Mounting bracket

Cable entry

Ethernet/PoE socket

Terminal module

Gas inlet port

Gas outlet port

Midas Technical Handbook

2-3

Midas® Gas Detector

REMOVE

AT TIME OF

INSTALLATION

2�2�1 Mounting Bracket

The metal mounting bracket has two slots that allow the detector to be easily mounted to a wall using two suitable screws (DIN rail or horizontal mounting options are also available). For further details of mounting the detector refer to Section 4.

2�2�2 Terminal Module

The terminal module is located on the mounting bracket. All electrical connections to Midas® are made via this module. Wire entry to the terminal module area is via the PG16 cable entry/conduit entry located at the bottom of the mounting bracket assembly.

2�3 Sensor Cartridge

A wide range of Flammable, Pyrophoric, Corrosive, and Oxidizer (including Oxygen) sensor cartridges can be ﬁtted to Midas®. The plug in sensor cartridges are ﬁtted in the sensor cartridge chamber at the front of the main chassis. To access the chamber the unit cover is removed by unscrewing the thumbscrew located at the front of the detector. The pre-calibrated smart sensor cartridges can easily be ﬁtted or replaced as they simply plug into the detector without the need for any tools. The sensor cartridge is ﬁrmly held in place by two locking tabs. Some cartridges are shipped with a protective cap to shield them from contaminants during shipping. This cap must be removed before inserting the cartridge into the Midas® unit, failure to do so may damage the Midas® transmitter.

Diagram 2-5� Sensor cartridge

Locking tabs

Front Back

Protective Cap (remove before use)

Connector

2�3�1 Biased Sensor Cartridges

Some sensor cartridges are shipped with a battery powered electrical supply in order to keep the cell effectively ‘warmed up’ and ready to monitor once installed in the Midas® unit. Battery powered bias circuits are supplied for TEOS, NO, and CO2. The bias circuit is removed just before insertion into the Midas® system and the sensor cartridge is thus ready sooner for effective gas detection.

Should a bias voltage not be applied (e.g. during a power failure), the cell will take a longer time to recover before effective gas detection can take place. The longer the loss of applied power, the longer the recovery time. During this recovery time, there is a chance for false/inaccurate readings. Refer to the relevant sensor cartridge data sheet for information on each sensor cartridge.

Midas Technical Handbook

In order to avoid the risk of loss of gas detection due to unforeseen power loss, we recommend that a power management solution such as uninterruptible power supplies are used.

2-4

Midas® Gas Detector

Sensor Cartridge

Note

Sensor warranty is void if the sensor cartridge is opened by unauthorized user.

Diagram 2-6� Biased Sensor�

2�4 Cover

The standard cover provides environmental protection and ﬁts over the top, front and sides of the main chassis. The front panel has viewing windows for the LCD, LEDs and sensor cartridge ﬁtted in the sensor cartridge chamber. Underneath the LCD window are the 4 push buttons used for navigating the detector’s software menus. The cover is easily removed to allow access to the chassis by unscrewing the thumbscrew on the front panel and pulling the cover forwards off the main chassis.

Midas units ﬁtted with a pyrolyzer utilize a ventilated cover due to the high temperatures generated by the pyrolyzer unit (See Diagram 2-7)

Diagram 2-7� Midas® covers

LED Windows

LCD Window

Pushbuttons Sensor Cartridge viewing window

Thumbscrew

Standard Cover

LED Windows

LCD Window

Pushbuttons

viewing window

Thumbscrew

Ventilated Pyrolyzer Cover

Midas Technical Handbook

2-5

Midas® Gas Detector

3 Default Conguration

Midas Technical Handbook

3-1

3 Default Conguration

As standard, the Midas® gas detector is factory conﬁgured as below:

Table 3-1� Midas® default conguration

1.0 mA Fault

Current source with:

2.0 mA Inhibit

3.0 mA Maintenance Fault

4.0 to 20.0 mA Gas reading (normal operation)

21.0 mA Over range

Toxic Gas Flammable Gas Oxygen

Midas® Gas Detector

Full Scale (FS)

Lowest Alarm Level (LAL)

Lower Detectable Limit

(LDL)

Alarm 1

(Relay 1)

Alarm 2

(Relay 2)

Fault

(Relay 3)

Latching

Pass code

IP Address

®

1

Midas

detectors are not ETL approved for monitoring in or sampling from classied areas above 25% LEL

Typically 4 x Threshold Limit

Value (TLV)

Typically 1/2 TLV 10% LEL 5% v/v

Typically 0.4 TLV 9% LEL 0% v/v

The LDL is the minimum level that is reliably distinguishable from zero.

1/2 TLV 10% LEL 23.5% v/v (Rising)

Contact Normally Open (NO), closes on alarm.

TLV 20% LEL 19.5% v/v (Falling)

Contact Normally Open (NO), closes on alarm.

Contact Normally Open (NO). Instrument Fault Only

Latching. Alarm and fault relays DO NOT automatically reset when reading falls below alarm

thresholds. Relays MUST be manually reset.

169.254.60.47 subnet mask 255.255.255.0

100% Lower Explosive Limit

Normally de-energized, energizes on alarm.

Normally energized, de-energizes on fault.

No pass code set.

(LEL)

1

25% Volume (v/v)

See Table 7-3 for more information on Relay Conﬁguration

Midas Technical Handbook

3-2

Midas® Gas Detector

4 Installation

Midas Technical Handbook

4-1

Midas® Gas Detector

4 Installation

For ease of installation Midas® has been designed to allow the installation of the mounting bracket assembly and terminal module separately from the other parts of the detector. The detector location and

hard wiring can therefore be completed before tting

the detector’s main chassis and sensor cartridge.

WARNING

Midas® is designed for installation and use in indoor safe area non-explosive atmospheres� Installation must be in accordance with the recognized standards of the appropriate authority in the country concerned� Prior to carrying out any installation ensure local

regulations and site procedures are followed�

Diagram 4-1. Midas® outline dimensions

5.91 in [150.00mm]

MDA Scientific Midas

4�1 Mounting and Location of Detector

The Midas® gas detector has an integral mounting bracket assembly that is easily mounted to a suitable vertical surface such as a wall, tool housing, mounting plate on a pole etc.

Drill Template

Drill 2 x M4 holes

2�3 in (58�50mm)

honeywell

PN: MIDAS-E-CDX SN: 12K-48397 Activate by 24-Nov-12

honeywell

2.48 in [63.00]

Midas Technical Handbook

z

zellweger analytics

GAS DETECTOR

4.72 in [120.00mm]

4-2

Note

This drill template is not to scale. The Midas Quick Start Guide (MIDAS-A-020) contains a full scale drawing.

Ensure all measurements are correct before using as an actual drill template.

Use 2 x M4 Screws or equivalent for mounting (head size 6-12 mm (1/4” - 1/2”))

Midas® Gas Detector

Note: Heat shield not present on all pyrolyzers.

3.9 in.

(98 mm)

3.9 in. (205 mm)

Midas-A-039

9.6 in.

(244 mm)

5.2 in.

(132 mm)

2.4 in. (60 mm)

Midas® Transmitters and Pyrolyzers

Midas-T-OOP

MDA Scientific Midas

honeywell

PN: MIDAS-E-CDX SN: 12K-48397 Activate by 24-Nov-12

honeywell

6.0 in (152 mm)

3.2 in

(83 mm)

2.3 in. (59 mm)

7.9 in (201 mm)

3.2 in

(81 mm)

2.5 in (62 mm)

Midas-T-HTP

Midas Technical Handbook

4-3

8.2 in.

(209 mm)

9.1 in. (233 mm)

4.4 in. (113 mm)

5.5 in.

(140 mm)

4.0 in. (101 mm)

Midas® Gas Detector

Below are some considerations when installing the Midas® Gas Detector:

1. Mount the detector on a surface that is flat, firm and suitable for its size and weight.

2. Use the drill template supplied to drill the holes for the fixings.

3. Use fasteners appropriate for the surface being mounted to.

4. Ensure the head size of fastener used will not snag the terminal PCB 6-12 mm (.25 in - .5 in).

5. Consider the conduit/cable weight and its stress on the installation.

6. Position the detector so that it can be easily accessed.

7. Position the detector so that it is at a suitable height (normally eye level) for the display to be clearly seen.

8. Take into consideration the space required to remove the detector’s cover and locking/ unlocking the sensor cartridge locking clips. Minimum recommended spacing between multiple Midas® units is 82 mm (3.23 in).

9. Take into consideration the space required for sample inlet and exhaust tubing (for remote monitoring), and for the inlet filter (for local monitoring).

10. Take into consideration the space required for cable or conduit access.

4�2 Mechanical Installation

The following steps and diagrams show how to separate the mounting bracket assembly from the main chassis and mount it on a vertical flat surface.

1. Unscrew the thumbscrew located on the front panel.

2. Remove the cover by pulling it forwards off the main chassis. Be sure to remove the internal packing card securing the pump. Failure to remove this packing will result in damage to the Midas® unit. (See Diagram 4-2)

3. Unscrew the two retaining screws located at the bottom front of the chassis.

4. Holding the mounting bracket assembly with one hand use the other to carefully pull the main chassis forward to disconnect it from the mounting bracket assembly.

5. Using the drill template provided drill two holes

58.50 mm vertically apart for 2 x round head M4 fixing screws.

6. Partially screw the fixings into the mounting surface.

7. Place the mounting bracket assembly over the screws so they pass through the mounting holes and then slide down to locate in the slots.

8. Tighten the screws to secure the mounting bracket assembly.

Midas Technical Handbook

4-4

Removing cover

Midas® Gas Detector

Diagram 4-2� Mechanical installation

chassis

Removing chassis

mounting bracket

chassis

TICE !

IMPORTANT NO

ve internal

ore

Remo

shipping protection from

the pump module brf

installation

Internal packing card

Remove before use.

loosen

cover

Chassis Mounting Screws

mounting bracket

IMPORTANT NOTICE !

Remove internal

shipping protection from the pump module brfore

installation

Internal packing card

Remove before use.

Midas Technical Handbook

4-5

Midas® Gas Detector

screws

Optional Midas

Diagram 4-3. Mechanical installation

mounting bracket

Standard Midas® Wall Mount

®

Pyrolyzer Adjustable “L” Bracket Mount

(MIDAS-A-032)

DIN Rail Bracket

Spacer Bracket

2x M4 Screws Secures Midas Spacer Bracket

®

to

Optional Midas® DIN Rail

Mount (MIDAS-A-036)

4x M3 Screws Secures DIN Rail to Spacer Bracket

MDA Scientific Midas

honeywell

PN: MIDAS-E-CDX SN: 12K-48397 Activate by 24-Nov-12

honeywell

Top Access Tubing Connector

(MIDAS-A-031)

Midas Technical Handbook

Note:

When using the Adjustable “L” bracket with the HighTemperature Pyrolyzer unit, (2) Top Access Tubing Connectors (MIDAS-A-

031) must be used to insure proper operation.

Optional Midas® Adjustable “L” Bracket Mount

(MIDAS-A-032)

4-6

Midas® Gas Detector

4�3 Sample and Exhaust Tubing Calculations

The following tables show the flow rate, tubing length, transport time, and maximum pressure and vacuum at the inlet and exhaust points. Tubing lengths vary among gases. See Appendix B for recommended lengths.

Table 4-1. Inlet sample specications

Inlet Sample Specifications:

Maximum

Tubing Length, m (ft)

Transport Time (sec), ID 1/8”

Transport Time (sec), ID 3/16”

Sample Point Vacuum (Negative pressure)

Flow rate, cc/min.

Tubing OD, mm (in)

Tubing ID, mm (in)

1

Honeywell Analytics recommends the thick-wall tubing (1/8”

ID) for best speed of response.

2

The ow rate is electronically maintained at approximately

500 cc/min and may vary within acceptable tolerances.

Table 4-2. Outlet sample specications

Outlet Sample Specifications:

Tubing Length, m (ft)

Back Pressure at Exhaust Point (Excluding tubing)

Tubing OD, mm (in)

Tubing ID, mm (in)

30 (100) 20 (66) 10 (33) 0

1

28 19 10 1

63 43 23 1

-25.4 cm H2O (-10 in H2O) Maximum

500 (Flow is constant)

6.35 (0.25)

3.18 (0.125)

Maximum

30 (100)

20.3 cm H2O (8 in H2O) Maximum

6.35 (0.25)

4.76 (0.188)

2

Note

Honeywell Analytics recommends the use of

Teon FEP (Fluorinated Ethylene Polymer)

tubing to assure proper sample transport.

The properties of Teon FEP make it the

best choice for transporting sample toxic gases to instruments when compared with the properties of other similar tubing materials.

If the pressure/vacuum on the inlet/exhaust lines does not meet the recommended values in Tables 4-1 and 4-2, the following chart describes potential fault conditions that may be brought on by the

external inuences thus resulting in an F81 Flow

Fault.

External Flow Fluctuation Fault 81 Explanation

Low

1

(0-150 cc/min)

Low

2

(0-150 cc/min)

Medium

3

(~200-450 cc/min)

High

4

(> 600 cc/min)

None No Midas® will auto-adjust

Midas® changes the flow

Ye s

(up to 100 cc/min

ﬂow swings)

Yes and No Ye s

gradually. If external flow changes are large and rapid,

Likely

the final reading will be different from what Midas® expected. Midas® will issue Fault 81.

Minimum flow rate for the pump is ~300 cc/min. With this external ﬂow, the auto-adjust cannot work because the pump cannot produce a ﬂow at this low level. The problem is worse if there are ﬂow ﬂuctuations.

Midas® cannot reduce the external flow. Midas® will issue Fault 81 due to high flow

Midas Technical Handbook

4-7

Midas® Gas Detector

4�4 In-line Filters

External filters must be used to protect the tubing from contamination. Use particulate

lter part number 780248 for normal gases and

1830-0055 or 1991-0147 for corrosive gases. Replace the filter every 3 months. Refer to

Appendix B for specic gases.

4�5 Local Detector Option

The Midas® gas detector can also be used to monitor for gas at the location of the detector. To

do this an inline lter is simply connected to the

sensor cartridge gas inlet port. The external dust

lter part number is 780248 for normal gases and

1830-0055 or 1991-0147 for corrosive gases. The area around the detector is then being monitored as opposed to a sample being drawn from a remote location.

Diagram 4-4� Local gas detector option

MDA Scientific Midas

4�6 Electrical Installation

Access for the electrical wires to the terminal module is made via the PG16 cable gland located at the bottom of the mounting bracket assembly. The cable gland can be removed and replaced with a suitable conduit fitting if required. The wire routing of a typical installation is shown in the diagram below, wiring details are shown in Diagram 4-6.

Diagram 4-5� Typical wire routing

4-20mA Analog Output Terminals

Relay Contact Terminals

Relay NO/NC Jumpers

Power Switch

MIDAS-T-001 transmitter installed with in line particulate

lter for local ambient monitoring

mode

Midas Technical Handbook

honeywell

PN: MIDAS-E-CDX SN: 12K-48397 Activate by 24-Nov-12

honeywell

Ethernet Cable

Cable Gland

The terminals used are suitable for conductors of 24 to 14 AWG (0.5 to 1.8mm Dia.). The use of 16 AWG (1.5 mm Dia.) conductors is recommended.

4-8

If Power over Ethernet (PoE) is used to power the device, then 24 VDC power must not also be connected to the device, (or conversely if 24 VDC is used to power the Midas®, then electrical power via the Ethernet port must not be applied). Failure to observe this requirement may cause damage to the gas detection system and will not be covered by the standard warranty.

When connecting the wires ensure that the power switch is in the off position.

Diagram 4-5 shows the terminal module layout

and terminal identication as well as the jumper

locations.

Note: Earthing Requirements

If the Midas® unit’s metal chassis is not connected directly to a metal surface for earthing purposes, an additional earth wire will be required. Connect a wire via the

PG16 gland to the dedicated earth tag (screw

terminal) located on the bottom bracket and connect the other end of the wire to a dedicated external earthing point.

Midas® Gas Detector

If Power over Ethernet (PoE) power supply

is being used, shielded CAT5 Ethernet cable is recommended.

Please ensure that your wiring avoids earth

ground loops that may affect the performance of your equipment

Midas Technical Handbook

4-9

Midas® Gas Detector

RJ-45

8

7

2

3

4

5

6

1

DC

PWR

+24 V

COM

NO

NC

Relay3

Relay2

Relay1

ON

SW

OFF

11

10

9

Analog Current

Loop 4-20 mA

INT EXT

EXT INT

-supply J5

J4

+supply

J1

NO

NC

J2

NO

NC

J3

PYROLYZER

CONNECTOR

Relay1

}

Relay2

}

Relay3

}

Diagram 4-6� Midas® terminal layout and identication

See Relay

function

table below

Display Description Relay 1 Relay 2 Relay 3

Note

1FLt

2Flt

CmbF

nEtr

Instrument Fault

Only

Separate Fault

Relays

Combined Fault

Relay

Remote control of

relays via Modbus/

TCP or LonWorks

The 3 relays onboard the Midas® unit can be controlled remotely from a separate controller system using

Modbus/TCP commands (or via LonWorks® if the optional interface is used). In this remote mode, the relays

cannot be controlled by the Midas® itself and only by the remote controller device (PLC, SCADA, etc.)

Alarm 1 Alarm 2

Any Alarm

Maintenance

Fault

Alarm 1 Alarm 2 Any Fault

Relays respond to Modbus or

LonWorks® holding registers only.

®

Instrument

Fault

Instrument

Fault

Relays

are user

congurable

Midas Technical Handbook

4-10

Midas® Gas Detector

4-20 mA

Controlled

Current Source

Internal

Power

Loads

J4

INT EXT

J5

EXT INT

11

10

9

MIDAS

Simplified Internal Schematic

2

1

-

+

-

24 VDC

+

-

24 VDC

R

Load

4-20 mA

Controlled

Current Source

Internal

Power

Loads

J4

INT EXT

J5

EXT INT

11

10

9

MIDAS

Simplified Internal Schematic

2

1

-

+

-

24 VDC

R

Load

4-20 mA

Controlled

Current Source

Internal

Power

Loads

J4

INT EXT

J5

EXT INT

11

10

9

MIDAS

Simplified Internal Schematic

2

1

-

+

-

24 VDC

R

Load

4-20 mA

Controlled

Current Source

Internal

Power

Loads

J4

INT EXT

J5

EXT INT

11

10

9

MIDAS

Simplified Internal Schematic

2

1

-

+

-

Ethernet

+

-

24 VDC

R

Load

RJ-45 Connector

48 VDC

4�7 Electrical Connections

Midas® can be powered by either 24 VDC via traditional discrete wiring or by approximately 48 VDC delivered through the Ethernet cable from a PoE source. In either case the 4-20 mA analog

output can be used. This can be congured for

fully isolated operation. With 24 VDC power the

4-20 mA output can be congured for sink, source

or isolated output operations.. Below are some schematic diagrams of typical electrical connection

Diagram 4-7� Generic Example

Midas® 4-Wire Isolated Output

configurations. Specific wiring instructions for connecting a Midas to a Honeywell Analytics Sieger System-57TM are provided on pages 4-12 to 4-16.

Specic instructions for connection to a Honeywell

Analytics TouchPointTM are provided on pages 4-17 to 4-20 and the HA71 on pages 4-21 and 4-22.

Note:

When wiring the Midas Transmitter to a

controller, program the controller for a 1-2 second delay before reporting to prevent false alarms.

Diagram 4-9� Generic Example

Midas® 3-Wire Sinking Output

Diagram 4-8� Generic Example

Midas® 3-Wire Sourcing

Midas Technical Handbook

Diagram 4-10� Generic Example

Midas® Isolated 4-20 mA Output w/PoE Power

4-11

Midas® Gas Detector

Diagram 4-11� Midas® to 5701 4-Wire Isolated Connection

J4

+supply

INT EXT

11

10

9

Loop 4-20 mA

Analog Current

EXT INT

-supply J5

PYROLYZER

CONNECTOR

MIDAS

Simplified Internal Schematic

2

+

Internal Power Loads

-

1

INT EXT

4-20 mA

Controlled

Current Source

EXT INT

Sieger System 57 Relay/Field Interface Card

NC

J1

NO

NC

J2

NO

NC

J3

NO

+24 V

COM

Relay1

Relay2

Relay3

8

}

7

6

5

4

3

2

1

Relay1

}

Relay2

}

Relay3

DC

PWR

ON

SW

OFF

Shielded Cable

05701-A-0326 05701-A-0327 05701-A-0328 05701-A-0329 05701-A-0330

Cabinet

29

35

28

36

5701 Card

RJ-45

Sensor Drive Module Link Positions

LK13

LK12

System 57

J4

11

10

J5

9

35

28

29

36

Relay/Field

Interface Card

5701 Control Card

VDC

Sense

Resistor

Isolated Loop

Supply

~40 mA max + 24

Transmitter

Supply

VDC

+ 24

-

LK11

LK10

LK9

LK8

LK7

LK6

LK5

LK4

LK3

LK2

LK1

Midas Technical Handbook

4-12

Midas® Gas Detector

4-20 mA

Controlled

Current Source

Internal

Power

Loads

J4

INT EXT

J5

EXT INT

11

10

9

MIDAS

Simplified Internal Schematic

2

1

-

+

Sieger System 57 Relay/Field Interface Card 05701-A-0326 05701-A-0327 05701-A-0328 05701-A-0329 05701-A-0330

System 57

Relay/Field

Interface Card

5701 Control Card

+

24

VDC

-

27

29

28

Sense

Resistor

~170 Ohm

Cabinet

29

2827

Shielded Cable

Transmitter

Supply

5701 Card Sensor Drive Module Link Positions

LK12

LK5

LK6

LK7

LK8

LK9

LK10

LK11

LK1

LK2

LK3

LK4

LK13

RJ-45

8

7

2

3

4

5

6

1

DC

PWR

+24 V

COM

NO

NC

Relay3

Relay2

Relay1

ON

SW

OFF

11

10

9

Analog Current

Loop 4-20 mA

INT EXT

EXT INT

-supply J5

J4

+supply

J1

NO

NC

J2

NO

NC

J3

PYROLYZER

CONNECTOR

Relay1

}

Relay2

}

Relay3

}

Diagram 4-12� Midas® to 5701 3-Wire Sourcing Connection

Midas Technical Handbook

4-13

Midas® Gas Detector

4-20 mA

Controlled

Current Source

Internal

Power

Loads

J4

INT EXT

J5

EXT INT

11

10

9

MIDAS

Simplified Internal Schematic

2

1

-

+

Sieger System 57 Relay/Field Interface Card 05701-A-0326 05701-A-0327 05701-A-0328 05701-A-0329 05701-A-0330

System 57

Relay/Field

Interface Card

5701 Control Card

+

24

VDC

-

27

29

28

Sense

Resistor

~170 ohm

Cabinet

29

28

27

Shielded Cable

Transmitter

Supply

5701 Card Sensor Drive Module Link Positions

LK12

LK5

LK6

LK7

LK8

LK9

LK10

LK11

LK1

LK2

LK3

LK4

LK13

RJ-45

8

7

2

3

4

5

6

1

DC

PWR

+24 V

COM

NO

NC

Relay3

Relay2

Relay1

ON

SW

OFF

11

10

9

Analog Current

Loop 4-20 mA

INT EXT

EXT INT

-supply J5

J4

+supply

J1

NO

NC

J2

NO

NC

J3

PYROLYZER

CONNECTOR

Relay1

}

Relay2

}

Relay3

}

Diagram 4-13� Midas® to 5701 3-Wire Sinking Connection

Midas Technical Handbook

4-14

4-20 mA

Controlled

Current Source

Internal

Power Loads

J4

INT EXT

J5

EXT INT

11

10

9

MIDAS

Simplified Internal Schematic

2

1

-

+

Sieger System 57 Quad Relay Interface Card 05704-A-0121 with 4 Channel Control Card 05704-A-0145

Cabinet

(01) 17

(S) 15

36

Shielded Cable

RJ-45

8

7

2

3

4

5

6

1

DC

PWR

+24 V

COM

NO

NC

Relay3

Relay2

Relay1

ON

SW

OFF

11

10

9

Analog Current

Loop 4-20 mA

INT EXT

EXT INT

-supply J5

J4

+supply

J1

NO

NC

J2

NO

NC

J3

PYROLYZER

CONNECTOR

Relay1

}

Relay2

}

Relay3

}

+

24

VDC

-

+

24

VDC

-

Note:

The above schematic shows the MIDAS connected to channel 1 on the 5704 card. The terminal numbers for all four channels are as follows:

MIDAS Function Loop + Loop Midas Ter minal Number

Color in this figure 5704 Channel 1 Terminal

5704 Channel 4 Terminal

5704 Channel 3 Terminal

5704 Channel 2 Terminal

11

Brown

15

22

21

16

System 57 Function S

10

Blue

17

24

23

18

01

17

15

System 57

Relay/Field

Interface Card

5704 Control Card

+

24

VDC

-

Sense

Resistor

Loop

Supply

Not optically isolated

Diagram 4-14� Midas® to 5704 4-Wire Connection

Midas® Gas Detector

Midas Technical Handbook

4-15