CTI GASMARK M255 Installation And Operation Manual
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CTI GASMARK M255 Installation And Operation Manual

Gas detection control panel
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M255
GAS DETECTION CONTROL PANEL

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Summary of Contents for CTI GASMARK M255

  • Page 1 M255 GAS DETECTION CONTROL PANEL...
  • Page 2 Use this product only in the manner described in this manual. If the equipment is used in a manner not specified by CTI, the protection provided by the equipment may be impaired. This equipment should be installed by qualified personnel.

  • Page 3: Table Of Contents

    Menu Tree Outline ....16 3.4.8.3 Calibration Mode ..49 ......... 19 ....... 50 3.4.2 Login 3.4.8.4 Averages 3.4.3 CTI Home Screen ...... 20 Startup Test ........51 3.4.3.1 Overview ....... 21 Responding to Alarm ......52 ........21 ......52 3.4.3.1.1...
  • Page 4 M255 Page intentionally blank...

  • Page 5: Safety Information

    The M255 is a Modbus gas detection controller specifically Use this product only in the manner described in this designed for use with CTI Modbus capable devices. It has manual. If the equipment is used in a manner not specified...

  • Page 6: Installation

    M255 Wiring: 2. Installation 2.3.1 Wiring Guidelines: Installation Guidelines: • Electrical wiring must comply with all applicable codes Locating the M255 Gas Detection Control Panel • Use stranded, copper wire/cable with a minimum of (controller) 167°F rating (75°C rating). • The important consideration when installing the M255 is •...

  • Page 7: Communication Wiring

    128 devices are connected on any of the four channels. • For optimum performance, CTI recommends that the M255 is always at the end of the line. When the M255 is at the end of the line, the EOL switches should always be set to the ON position.

  • Page 8: Device Power Wiring

    See supported Modbus device installation manuals for more details on device power wiring. A power wiring calculator is available upon request, contact CTI for help with recommendations. Caution: To prevent excessive voltage drops and/or power supply overloads, careful consideration should be taken to take into account all 24Vdc devices on the power supplies.

  • Page 9: Relay Output Wiring

    M255 2.3.7 Discrete Input Wiring: 2.3.6 Relay Output Wiring: The M255 has eight discrete inputs located on the main There are nine relay outputs local to the M255. One is interface board, for use with the Discrete Inputs feature designated as the Fault Relay, while the other eight are (see 3.4.4.2.2).

  • Page 10: Network Layout Example

    M255 Network Layout Example 2.4.1 Gas Detector Network with M255 onboard power supply and external power supplies. 2.4.2 Gas Detector Network with only external power supplies.

  • Page 11: Network With Junction Box

    M255 2.4.3 Gas Detector Network with wiring at junction boxes. FROM PREVIOUS DEVICE TO NEXT DEVICE...

  • Page 12: M255 Terminals & Board Layout

    M255 M255 Terminals, Ports, Components, and Board Layout USB port: Display updates...
  • Page 13 M255 10A 250V USB port: Logic updates Fault Indicator Slow Blow Fuse 10A 250V Slow Blow Fuse Cooling Voltage input selection switch (120V/240V). Any service performed on this equipment should be completed by qualified/authorized personnel; equipment does not contain user serviceable components.

  • Page 14: Operation

    3.1.2 Initial Startup 1. Detectors 2. Discrete Inputs The "CTi" logo will be displayed while the system initializes 3. Groups the hardware and software components. The Initial 4. Relays Startup sequence will be initialized by simply powering up 5.

  • Page 15: Navigating The Screens

    M255 3.3 Quick Start Guide 3.2.2 Navigating the screens 3.2.2.1 Scrolling 1. Check Wiring: Make sure all connected devices are terminated and wire terminals are tightened. Scroll up or down to view more table rows when 2. Apply Power: Turn on AC power breaker to apply applicable.

  • Page 16: Menus

    M255 3.4 Menu Screens 3.4.1 Menu tree outline The Menu Tree can be used to quickly find screens. It also shows which screens are configurable and which are view only.
  • Page 17 M255...
  • Page 18 M255 Page intentionally blank...

  • Page 19: Login

    M255 3.4.2 Login Screen Once logged in successfully, the Login icon on the home screen will show yellow with a key. To change configurations or system settings, a login is required. A login pop-up screen will appear when the user attempts the changes.

  • Page 20: Cti Home Screen

    The user may access the Home Screen at any point by tapping the "CTi" button on the left side of screen. The Home Screen allows an at-a-glance view of the status of all connected devices. Data from each device is displayed in a grid pattern.

  • Page 21: Overview

    M255 3.4.3.1 Overview 3.4.3.1.1 Chart From the CTI Home Screen users may view data for an By tapping on the concentration level chart users can see individual device by tapping on the appropriate device the chart in larger format with options to scale the time from the home screen.

  • Page 22: Devices

    M255 3.4.4 Devices Screen After Discovery, verify all devices have been discovered. If it appears that one or more devices were not discovered, 3.4.4.1 Discovery Screen verify Modbus addresses and perform Discovery process Discovery attempts to communicate with all Modbus again.

  • Page 23: Inputs

    M255 3.4.4.2 Inputs Screen 3.4.4.2.1 Detectors Screen The Detector input page allows the user to: • Configure both analog and Modbus detectors. • Edit the settings of each detector. • De/activate the detectors. Note: All detectors are made Active by default during Discovery. •...

  • Page 24: Discrete Inputs

    M255 3.4.4.2.2 Discrete Inputs Screen Each Discrete Input may also be assigned to one or more outputs by adding the input to a relay with its Modbus The Discrete Inputs screen allows the user to configure Address. the inputs to control outputs of the system. Tap on Discrete Input you would like to assign, ensuring The user is able to: it is highlighted in blue.

  • Page 25: Group Selection

    M255 3.4.4.2.3 Group Selection Screen The Group Selection screen allows the user to group Active Input Signals into a common alarm. The M255 supports up to 26 different groups. Group A includes all active Input Signals. The user may configure Groups B-Z as needed. The user will be able to quickly see which detectors are actively a part of a group.

  • Page 26: Group Config

    M255 3.4.4.2.4 Group Config Screen The Group Configuration screen allows the user to configure and link groups of inputs to outputs of the system. Tap on Group you would like to configure, ensuring it is highlighted in blue. Then tap the "plus" sign in Output row of the Config Table.

  • Page 27: Outputs

    M255 3.4.4.3 Outputs Screens Normally Energized: Selecting normally energized keeps the relay energized in the non-alarm state. 3.4.4.3.1 Relay Outputs Screen Latching: Setting the relay to latch (typically recommended for equipment shutdown) will require The Relay Outputs screen allows the user to configure the a manual reset from the M255 operator interface.
  • Page 28 M255 Add Config: The M255 controller allows the user to add and configure Alarm Condition: Select from prior specified conditions which devices or group of devices are connected to a the relay will be tripped and signal an alarm. certain relay. Set Delay: Set relay on-time delay All of the on board relays are listed in the Relay Configuration table, along with any connected devices.

  • Page 29: Analog Outputs

    M255 3.4.4.3.2 Analog Outputs Screen Refer to your specific device manual for details and requirements for analog and discrete inputs for fan The Analog Output Configuration page allows the user to activation and speed control. configure the 4-20 mA analog output on remote devices. Using your provided worksheet and notes: 1.

  • Page 30: Settings

    M255 3.4.5 Settings Screens 3.4.5.2 Network 3.4.5.1 General Users with a PLC may set the IP Address manually via the Network settings page. The user may adjust Date/Time, User Time-out, Main Menu Time-out, Local Reset/Silence, and Alarm/Special • Switch from Automatic to manual. State colors through the Settings menu by selecting •...

  • Page 31: Gateway

    M255 3.4.5.3 Gateway Note: When selecting the RS-485 Gateway modes please note that Modbus operates using 8-E-1 data formatting The M255 Gateway feature allows a network interface and BACnet uses 8-N-1. between the control panel and an existing plant PLC Users may adjust the Baud of the Gateway;...

  • Page 32: Gateway Mapping

    M255 3.4.5.3.1 Gateway Mapping 3.4.5.3.2 Ethernet All Gateway features will require management of the 3.4.5.3.2.1 Ethernet/IP Gateway Map which maps sensor levels, analog signals, The M255 has built-in support for Ethernet/IP alarm states, and relay states to values in the PLC tag communication with most industrial PLCs using controller arrays.

  • Page 33: Setup

    M255 3.4.5.3.2.1.1 Ethernet/IP Setup 3.4.5.3.2.1.2 Tag File Export PLC Tags can be created by importing the Tag File A Tag file may be created with the Tag File button it generated by the M255 or by manually creating the Tags in generates a CSV file that can be loaded into PLC software PLC software.

  • Page 34: Plc Setup

    M255 3.4.5.3.2.1.4 PLC Setup Viewing Tags in Logix Designer: The M255 Ethernet/IP Gateway works with all PLCs that The default Tag Names can be changed on the M255 support controller tags. Before setting up the PLC, ensure (3.4.5.3.2.1). The M255 will continually update the tags the M255 settings have been updated, and the Gateway as values change.

  • Page 35: Modbus Tcp & Bacnet/Ip

    M255 3.4.5.3.2.2 Modbus TCP & BACnet/IP 3.4.5.3.3 RS-485 Use the Gateway Mapping feature (3.4.5.3.1) to acquire Each RS-485 Gateway feature may be enabled via main appropriate values for Modbus TCP and BACnet/IP tags on menu and can be further accessed settings button located your PLC.

  • Page 36: Bacnet Mstp

    M255 3.4.5.3.3.2 BACnet MSTP 3.4.5.3.3.3 Passthrough BACnet MSTP requires users to set the Baud, Address, The Passthrough feature allows a PLC to view the analog and instance of the M255 on the BACnet network via the in signal of a device networked with the M255; requested settings button.

  • Page 37: User Admin

    M255 3.4.5.4 User Admin Screen During initial start-up of the M255 the general Admin Username and Password is used to designate additional users depending on their role. Admin Password: 5861 Users will be classified as one of: • User - View Only, able to silence/reset alarms •...

  • Page 38: Import/Export Data

    3. Select Click to select USB, and select the USB. stamp. 4. Use the drop-down menu to select files to be imported Diagnostics Log: For CTI personnel diagnostics. or exported. Configuration Log: Creates a CSV file displaying configuration changes to all devices with date/time stamp.

  • Page 39: Software Update

    M255 The unit will install software and prompts for a restart of 3.4.5.6 Software Update Screen the M255. Updating the M255 software will require use of an empty USB drive, FAT32 formatted. The software can be emailed to the user and loaded onto the USB flash drive.

  • Page 40: Factory Reset

    M255 3.4.5.7 Factory Reset Screen Similar to smart phones and other devices, factory reset deletes data tables and configuration files, and restores it back to factory settings. Note: Event Log (3.4.7.1) and Configuration Log (3.4.7.2) will not be erased if a factory reset is performed. This cannot be undone once the Reset button is selected.

  • Page 41: Info

    If the M255 detects a Communication Fault with a device the Comm Status will reflect an error. It also displays the hardware revision and current software revision of the discovered devices. Contact service at CTI for help troubleshooting.

  • Page 42: Relay States

    M255 3.4.6.3 Relay States Screen The relay states screen shows which relays on the network are active, and whether they are tripped due to an event.

  • Page 43: Discrete States

    M255 3.4.6.4 Discrete States Screen The Discrete States Screen provides a quick at a glance view of which discrete inputs are currently active.

  • Page 44: System Info

    M255 3.4.6.4 System Info Screen The system info screen provides a convenient view of vital hardware and software information.

  • Page 45: Data

    M255 3.4.7 Data Screens 3.4.7.1 Event Log Screen The event log records every event and stores them in chronological order, with date and time stamps. Note: The event log is not erased when the M255 is restored to factory defaults (3.4.5.6). Date &...

  • Page 46: Configuration Log

    M255 3.4.7.2 Configuration Log Screen Parameter: Shows which parameter was changed. The Configuration Log records when a user changes a setting through the M255 controller. Values: Changes are stored chronologically with a date and time Shows last recorded and newly changed value for the stamp.

  • Page 47: Service

    M255 3.4.8 Service Screens 3.4.8.1 Sim Mode Screen The M255 Sim Mode allows the user to simulate different values detected for the purpose of testing alarm and gas threshold actions as programmed and configured. The user may select a specific device to test. Tap the edit button for the selected device, use the slider that appears to adjust the simulated value to be tested.

  • Page 48: Relay Mode

    M255 3.4.8.2 Relay Mode Screen The M255 Relay Mode is used to disable and test relays in the controller. If the user disables a relay, a disable will start; while relay is disabled it will not go into alarm. If the timer counts down to zero all disabled relays will re-enable.

  • Page 49: Calibration Mode

    M255 3.4.8.3 Calibration Mode Screen After all calibrations have been completed, the user must press the "Update Last Cal" button for the "Last Cal Date" The M255 Calibration Mode is used to put a selected and "Cal Due Date" to change. number of devices into calibration mode so a calibration gas may be applied to the device in order to adjust the zero and span.

  • Page 50: Averages

    M255 3.4.8.4 Averages Screen The Averages Screen provides users a way to view the Time Weighted Average (TWA) and Short Term Exposure Limit (STEL) for all devices. TWA is calculated over an 8 hour period. STEL is calculated for a 15 minute period. Users have the ability to reset the averages for individual devices.

  • Page 51: Startup Test

    Start-Up Test Recommendations: 1. CTI recommends users perform detector calibration upon start-up per detector instructions. 2. A second person may be needed to confirm alarms, exhaust fans, louvers, audio/visuals devices, etc are working as intended.

  • Page 52: Responding To Alarm

    M255 3.6 Responding to Alarm 3.7 Responding to Fault When an alarm occurs on a device configured to the If the M255 receives a Fault signal from a configured M255 controller, the status color of the device will device the color of the device ID will change, defaulted to change according to the alarm being signaled.

  • Page 53: Maintenance

    M255 4. Maintenance System Maintenance All gas detection systems should be calibrated with certified calibration gas as specified in the individual Any service performed on this equipment should be device manuals. All alarm functions and outputs should completed by qualified/authorized personnel; equipment be tested, verified, and documented after calibration.

  • Page 54: Specifications

    24Vdc, 3.25A @ 104°F (40°C) Certification: Nemko Listed: Conforms to UL 61010-1 Communications: Certified to CSA C22.2 No. 61010-1-12 RS-485 Modbus RTU, 4 channels, compatible with CTI Modbus capable device models only. Analog Inputs: (8) 4-20 mA, 251 Ohm input impedance. Capacity: 255 devices.

  • Page 55: Limited Warranty And Limitation Of Liability

    No goods shall be returned to CTI until receipt by the buyer of shipping instructions from CTI; and the right of CTI to require that the buyer provide proof of purchase such as the original invoice, bill of sale or packing slip to establish that the product is within the warranty period.
  • Page 56 CT6-DOC2-3 SW version: 2.3.1 20240813...

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