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Merlin
GM-100
INSTALLATION & OPERATION
Please read these instructions carefully before use and retain for future reference.
These instructions can also be downloaded in electronic form on the product website.
For specific requirements that may deviate from these instructions – contact your supplier.
snsnorthern.com
info
snsnorthern.com
S&S NORTHERN LTD – PR7 7JN, UK Tel: +44 (0) 1257 470983 -
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Summary of Contents for S&S Northern Merlin GM-100
- Page 1 Merlin GM-100 INSTALLATION & OPERATION Please read these instructions carefully before use and retain for future reference. These instructions can also be downloaded in electronic form on the product website. For specific requirements that may deviate from these instructions – contact your supplier. snsnorthern.com info snsnorthern.com...
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Page 2: Table Of Contents
Merlin GM100 Contents Important Information ..................... 4 Copyrights ..............................4 Manufacturer’s Warranty ..........................4 Disposing of Electrical & Electronic Equipment (WEEE) ................. 4 Revisions ................................ 4 Safety Statements ............................4 Introduction ......................... 5 General Description ............................5 Key Features ..............................5 Applications .............................. - Page 3 Merlin GM100 Access Configuration Menu ......................... 16 Configuration List & Parameters ........................16 Default Sensor Alarms ..........................17 End Of Life (Replace) Indication ........................17 Commissioning ......................18 Overview ..............................18 Maintenance ......................19 Service Reminder ............................19 Reset Service Reminder ..........................19 Cleaning the Equipment ..........................
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Page 4: Important Information
Merlin GM100 Important Information Copyrights This manual is subject to copyright protection; all rights are reserved. Under international and domestic copyright laws, this manual may not be copied or translated, in whole or in part, in any manner or format, without the written permission of S&S Northern Limited. -
Page 5: Introduction
Merlin GM100 Introduction General Description This equipment has been designed to meet the requirements of high specification requirements of customised solutions. Available with single and dual gas detection capability, designed for all areas being directly connected to low voltage supply. The equipment is to be installed in non-classified, non-hazardous, permanent locations and is intended to continuously monitor the ambient air for dangerous gas/air concentrations. -
Page 6: Appearance
Merlin GM100 Appearance M4x15mm bolts Secures front fascia decal. LCD Display Gas Type / Concentration / Unit / ID User Buttons Silence audible buzzer / Acknowledge alarm / Override / Navigate menu LED Status Indication Power-OK / Fault-Warning / Alarm / Calibration Gas Sensor Opening Allows diffusion monitoring of air and gas Replacement Parts List... -
Page 7: Technical Specifications
Merlin GM100 Technical Specifications Mechanical Material ABS Flame Retardant UL94 V0 Height 5.95” (151.2mm) Width 4.37” (111.2mm) Depth 1.97” (50mm) Weight 350g / 12.5 oz Electrical Power – Low Voltage Nominal 24V AC/DC (12-32) Consumption - Low V 1.5 W Wiring (RS485) 127 Units Digital Output x1... -
Page 8: Sensor Specifications
Merlin GM100 Sensor Specifications Carbon Monoxide - CO Type Electrochemical Measuring Range 0-250ppm Response (t90) <30s Resolution 1ppm Stability / Year <10% Expected Lifecycle >6 years in clean air and regular maintenance. Calibration Every 6, 12 or 18-months dependant on application and climate. Cross Sensitivity Available on request Repeatability... -
Page 9: Installation
Merlin GM100 Avoid environmental conditions outside of this specification that could potentially impede the accuracy and operation of the equipment such as condensation; vibration; temperature, pressure, the presence of other gases, electromagnetic interference, and draft zones. The audible alarm will only sound if the buzzer switch is turned on. Following over or under range indications, recalibrate the sensor to ensure continued accuracy. -
Page 10: Coverage
Merlin GM100 Coverage 50ft radius per detector is a reasonable guide (15.2 metres), therefore multiple detectors may be required to adequately protect property and persons. However, coverage should be determined by those who have knowledge of gas dispersion, target gas characteristics, the environment, process plant system(s) and intended functions etc., and in consultation with both safety and electrical engineering personnel. -
Page 11: Mounting Instructions
Merlin GM100 Mounting Instructions Position at a location with minimum noise, vibration, and environmental variation. Damage when creating entry points or attempting to remove the circuit board may void any warranty. Avoid environmental conditions outside of this specification that could potentially impede the accuracy and operation of the equipment such as condensation;... -
Page 12: Power & Digital Rs485 Wiring
Merlin GM100 Power & Digital RS485 Wiring Warranty may be void if damage occurs to the circuit board from use of solid core wire attached directly to terminals. The equipment requires a continual supply of electrical power – it will not work without power. The equipment is powered by low voltage 12-24V DC or AC. -
Page 13: Analog Output Wiring
Merlin GM100 Switch Function Label Parameter RS485 OFF/M Off/M: Modbus RTU / Selection ON/B On/B: BACnet MS/TP Achieved by adding binary switch values together. Slave ID Example #4 ON + #16 ON = ID: 20. (Max. 127) On/Off configuration achieves either. 9600, 19200, 38400 or 9~10 Baud Rate B1 / B2... -
Page 14: Operation
Merlin GM100 To avoid water entering the rear of the monitor the sealing gasket should be adhered to the rear of the monitor using the self-adhesive tape, positioning squarely to the rear of the enclosure and firmly press into position. Fixing screws can we screwed through the gasket to secure the monitor to a wall. Apply the Solid Neoprene adhesive foam sheet to seal the rear fixing holes It is recommended to carry out regular maintenance, the side gas vent holes should be brush-cleaned to avoid them being clogged, the frequency will depend on the environmental conditions. -
Page 15: User Button Functions
Merlin GM100 Visual indication of the gas detector status is provided by a single RGB colour LED. Detector condition and corresponding outputs are shown below (as factory set condition). Condition Description Buzzer 1A Relay Warm-up Green LED Blink Normal Green LED On Alarm Low Red LED Blink BEEP... -
Page 16: Access Configuration Menu
Merlin GM100 Access Configuration Menu To enter the settings menu, hold the <SILENCE & RESET> buttons for 5 sec. Use all 3 buttons to scroll through numbers (0-9) and Enter Code 753. Hold the OK button for 3s to accept the code and enter the menu. (Toggle using <... -
Page 17: Default Sensor Alarms
Merlin GM100 Configure Analog Output 0-100% ANALOG RANGE 20-100% 0-100% = 0-10v / 0-20mA 20-100% 20-100% = 2-10v /4-20mA BACK TO MENU Return to the menu EXIT W/O SAVE Exit without saving SAVE/EXIT/R SAVE & EXIT Save settings and exit RESET &... -
Page 18: Commissioning
Merlin GM100 Commissioning Overview We recommend all gas detection equipment be commissioned by competent/trained engineers. Gas detectors are factory calibrated when shipped under ambient conditions, however, we recommend the detectors response and alarm signals are tested and validated once installed and subsequently every 6-18 months thereafter to retain optimum safety. -
Page 19: Maintenance
Merlin GM100 Maintenance Service Reminder The service message is factory set as OFF and can be set up from the configuration menu. The service message acts as a reminder to carry out a periodic check of the sensor. Once a service message has been set and the period has been reached, an indication (S) will be displayed on the screen. -
Page 20: Calibration
Merlin GM100 Select the module S1 or S2 using the < > buttons, Once the code is accepted use the < and > buttons to press OK to confirm. access REPLACE and press Ok. Select Yes or No using the < > buttons, Select Enable or Disable using the <... -
Page 21: Calibration Procedure
Merlin GM100 Calibration Procedure To enter calibration, enter configuration menu, use the < > buttons to access [Calibration] and press [OK]. Use the < and > buttons to select the module to be Press OK to confirm the gas type. calibrated S1 or S2 and press OK. -
Page 22: System Bump Test
Merlin GM100 Calibration failed [NOK] NOK displayed in yellow indicates the calibration has failed and results haven’t been saved, the calibration should be repeated following the parameters as specified at the start of the procedure. Now press OK and then < to select BACK, wait 10 sec for a time out to return to normal operation or Press OK to return to the Menu. -
Page 23: Bump Test Procedure
Merlin GM100 Bump Test Procedure Take normal precautions when using cylinders, they should always be stored in the vertical position and secured to prevent them from falling over. Ensure valve/regulators are screwed and secured tight before use and ensure valves are closed after use. Ensure all test gas is within the expiration date. -
Page 24: Additional Information
Merlin GM100 Additional Information Sensor Principle - Electrochemical Electrochemical sensors measure the partial pressure of gases under atmospheric conditions. The monitored ambient air diffuses through a membrane into the liquid electrolyte in the sensor. The electrolyte contains a measuring electrode, a counter-electrode, and a reference electrode. An electronic “potentiated” circuit ensures a constant electrical voltage between measuring electrode and reference electrode. -
Page 25: Bacnet Functionality
Merlin GM100 BACNET FUNCTIONALITY Parity: None / Data-Word length: 8-bit / Stop bit: 1 BACnet Interoperability Building Blocks Supported Description BIBB Comments Read Property DS-RP-B Read Property Multiple DS-RPM-B Write property DS-WP-B Dynamic Device Binding DM-DDB-B Execute who is / Initiate I am Dynamic Object Binding DM-DOB-B Device Comm Control... - Page 26 Merlin GM100 Vendor Name S&S Northern Ltd Vendor Identifier 1448 Model Name Merlin GM 100 Firmware Revision 1.0.0 Application SW Version Protocol Version Protocol Revision Protocol Services Supported Binary List Object List Object Array Max APDU Length Segmentation Support 3: None APDU Timeout 3000 Number APDU Retries...
- Page 27 Merlin GM100 Analog Value Objects (AV) Property Name / ID Default Object Identifier OBJECT_ANALOG_OUTPUT: # AV-1: S1 Low Alarm AV-2: S1 High Alarm AV-3: S2 Low Alarm AV-4: S2 High Alarm AV-5: High Alarm Delay (0-99) AV-6: Zone Number (0-10) AV-7: Signal Relay Follows (1: Low Alarm, 2: High Alarm) Object Name AV-8: Temperature Offset (-9 to +9)
- Page 28 GM100 User Manual Multi-State Value (MSV) Temperature Unit Property Name / ID Default Object Identifier OBJECT_MULTI_STATE_VALUE:1 Object Name Error Codes Object Type 19: Object Multi State Value Present Value °Fahrenheit 2: ( Status Flag 0000 Event State NORMAL Out-of-Service FALSE Number of States 1: °C States...
- Page 29 GM100 User Manual Multi-State Value (MSV) Audible Alarm Property Name / ID Default Object Identifier OBJECT_MULTI_STATE_VALUE:4 Object Name Audible Alarm Object Type 19: Object Multi State Value Present Value 1: (OFF) Status Flag 0000 Event State NORMAL Out-of-Service FALSE Number of States 1: OFF States 2: ON...
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Page 30: Modbus Functionality
GM100 User Manual MODBUS FUNCTIONALITY Parity: None / Data-Word length: 8-bit / Stop bit: 1 Operation Register/Address Description Notes Read/Write 40000-40030 Reserved Type: uINT, Factor:1 9600 (Default), 40031 Baud Rate 19200, 38400, 57600 via dipswitch Type: uINT, Factor:1, 40032 Address 0-127 via DIP Switch 40033 Model number... - Page 31 GM100 User Manual Type: uINT, Factor: 1, Default: 0 40055 Temperature High Alarm Enable (0=OFF, 1=ON) Type: uINT, Factor: 1, Default: 0 40056 Temperature Low Alarm Enable (0=OFF, 1=ON) 40057 Type: uINT, Factor: 1, Default: 2 40058 Temperature Unit (1=°C, 2 =°F) 40059 Reserved 1: No Error...
- Page 32 GM100 User Manual Please pass this manual to the system owner/user. Date of Installation: Installation Location: Organisation: Stamp/Signature of the installer: S&S Northern Limited www.snsnorthern.com S&S Northern Head Office Tel: +44 (0) 1257 470983 info@snsnorthern.com S&S Northern Limited is the owner of this document and reserves all rights of modification without prior notice. Rev 04 Page 32 of 32...
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