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CTI GASMARK M-XM Installation And Operation Manual

M255 expansion modules
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M-XM
M255 EXPANSION MODULES

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Summary of Contents for CTI GASMARK M-XM

  • Page 1 M-XM M255 EXPANSION MODULES...
  • 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

    GASMARK™ M-XM Table of Contents Safety Information ......... 4 General Description ......4 Installation ..........5 ......5 Installation guidelines Wiring ..........6 2.2.1 Wiring Guidelines ..... 6 ....6 2.2.2 Device Power Wiring ..... 7 2.2.3 Communication Wiring 2.2.4 Wiring Other ......

  • Page 4: Safety Information

    If the equipment is used in a manner not specified to provide users with options to increase the number by CTI, the protection provided by the equipment may be of inputs and/or outputs for the GASMARK™ M255 Gas impaired.

  • Page 5: Installation

    Locating the GASMARK™ M-XM Modules as an Expansion Panel • Mount the expansion panel in a general-purpose • The GASMARK M-XM modules should be installed within location only. Do not install in a hazardous environment. an enclosure rated for the environment, forming an "expansion panel."...

  • Page 6: Wiring

    • Electrical wiring must comply with all applicable codes power wiring calculator is available upon request, contact • Use stranded, copper wire/cable with a minimum of CTI for help with recommendations. 167°F rating (75°C rating). • All wiring should be rated for 300V or greater.

  • Page 7: Communication Wiring

    GASMARK™ M-XM 2.2.3 Communication Wiring Figure 3: M-XM Module Communication Wiring The GASMARK™ M255 and GASMARK M-XM Expansion Modules use Modbus RTU over RS-485 cable to communicate. This allows multiple devices to be daisy- chained together on a common communication line.
  • Page 8 GASMARK™ M-XM Figure 4: Example M255 Network with M-XM Expansion Modules...

  • Page 9: Operation

    GASMARK™ M-XM 3. Operation 3.2 Quick Start Guide 3.1 Power-up 1. Check Wiring: Make sure all connected devices are Before applying power, make a final check of all wiring terminated and wire terminals are tightened. for continuity, shorts, grounds, etc. It is usually best to 2.

  • Page 10: Expansion Modules

    GASMARK™ M-XM 4. Expansion Modules M-AIM8: Analog Input Module Figure 6: M-AIM8 Input Wiring The M-AIM8 Analog Input Module increases the number of 4-20mA detectors which can be attached to a GASMARK™ M255 Gas Detection Control Panel. Each M-AIM8 supports up to 8 channels of 4-20mA detectors by utilizing analog to RS-485 Modbus conversion.

  • Page 11: M-Dim4: Discrete Input Module

    GASMARK™ M-XM M-DIM4: Discrete Input Module Figure 8: Example - M-DIM4 The M-DIM4 Discrete Input Module increases the number of discrete devices which can be attached to a GASMARK™ M255. Each M-DIM4 can handle 4 additional inputs. Each channel is current sourcing. A courtesy 24Vdc terminal block on the M-DIM4 can be used to provide power for devices with auxiliary lights or signals.

  • Page 12: M-Rm8: Relay Output Module

    GASMARK™ M-XM M-RM8: Relay Output Module 4.3.2 AC Power Wiring: The M-RM8 Relay Output Module provides 8 additional Any attached device that requires AC power should be tied general purpose relay outputs for use with the GASMARK to a Class II Power Supply. M255.
  • Page 13 GASMARK™ M-XM Figure 10: M-RM8 Output Wiring...

  • Page 14: M-Aom8: Analog Output Module

    Refer to the manual for each device for cable recommendations. • The Analog-Output Module requires each supported device to be wired via home-runs back to the GASMARK M-XM. • Length of cable should not exceed 1500 feet (457 meters). The M-AOM8 allows an operator to monitor the 4-20mA signal via test points on the module.

  • Page 15: Maintenance

    GASMARK™ M-XM 5. 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 16: Specifications

    GASMARK™ M-XM 6. Specifications M-AIM8 M-DIM4 M-AOM8 M-RM8 Voltage 24Vdc with isolation or class 2 power supply Device Current 250mA @24Vdc Pass Through 1.5A@24Vdc 7.5A@24Vdc 7.5A@24Vdc Current per channel Relay Output: 12A Max 5A@24Vdc per module 8A@120-240 Vac Communications Modbus RTU, 8-E-1 @ 9600 baud Modbus Communications Input Signal:...

  • Page 17: Warranty

    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 18 CT29-DOC1-1 20250430...

This manual is also suitable for:

M-aim8M-dim4M-aom8M-rm8

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