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Mitsubishi Electric Air-conditioner Network System
Central Controller
Model: GB-50A
Before using the controller, please read this Installation Manual carefully to ensure correct
operation. Store this Installation Manual in a location that is easy to find.
2. Confirmation of Parts .................................................3
3. Product Feature .........................................................4
4. System Diagram ........................................................5
5. Installation Method ....................................................7
1. Part prepared at site ..............................................7
3. Installation method ................................................8
6. Wiring Method .........................................................11
1. Grounding cable. .................................................11
2. Cover removal and installation .............................11
3. M-NET transmission line ......................................12
4. LAN connection ...................................................12
7. Initial setting ............................................................13
2. Setting of the service switch.................................14
8. Test Run .................................................................15
1. Collective operation ON/OFF ...............................15
2. Service LED display.............................................15
9. Example for System Configuration............................16
1. To control a K control model ................................16
1. External signal input function ...............................16
2. External signal output function .............................18
Installation Manual
Contents

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   Summary of Contents for Mitsubishi Electric GB-50A

  • Page 1: Table Of Contents

    Mitsubishi Electric Air-conditioner Network System Central Controller Installation Manual Model: GB-50A Contents 1. Safety Precautions to be Observed without Fail ..1 2. Confirmation of Parts ..........3 3. Product Feature ............4 4. System Diagram ............5 5. Installation Method ............7 1. Part prepared at site ..........7 2.

  • Page 2: Safety Precautions To Be Observed Without Fail

    This manual describes the installation of the central controller and wiring to the air conditioner. Refer to the installation manual of the air conditioner. Carefully read item “1 Safety precautions to be observed without fail” before installing the unit. Safety Precautions to be Observed without Fail * Hazards and levels of danger that can occur due to incorrect handling are classified by the following symbols.

  • Page 3

    CAUTION Perform wiring so the tension is not Do not install this controller in a place applied. where an acid or alkaline solution, If tension is applied, it may cause special spray, etc. is used frequently. disconnection, heat generation or a fire. It may cause an electric shock or malfunction.

  • Page 4: Confirmation Of Parts

    *1: Cannot be connected to the different transmission line for central control in the different system. * Use PAC-SC50KUA (power supply unit) when “Charge” function is used, or multiple outdoor units are connected. Connect only the M-NET terminal (TB2) on PAC-SC50KUA to the M-NET terminal on GB-50A.

  • Page 5: Product Feature

    Product Feature 1. Specification Item Contents Interface M-NET :DC30V/24V;0.13/0.15A External I/O :DC12V or 24V (External power supply) Ethernet :10Base-T Environmental condition Temperature Operating range 0 to 40º / 32 to 104ºF Storage range -20 to 60º / -4 to 140ºF Humidity 30~90%RH (No condensation) Dimensions...

  • Page 6: System Diagram

    System Diagram PAR-20/21MAA (MA) Note ●This diagram does not show the AC power supply wiring. Only the configuration for the transmission line is shown. * Address setting for each M-NET device (The address cannot be duplicated.) * The K transmission converter (PAC-SC25KAA) and OA processing unit (LOSSNAY) are not included in systems shipped to North America (USA &...

  • Page 7

    NOTE * The following precautions will apply when using the K transmission converter (model: PAC-SC25KAA) and controlling the M-NET model and K control model with the same controller. Refer to the K transmission converter installation manual for details. 1) Central controller address Always set the controller address to “00”.

  • Page 8: Installation Method

    * 1: Not including the remote control cables up to 10m (32 ft) in length. If the remote control cable exceeds 10m (32 ft), the excess must be added to the total length in order to avoid exceeding the maximum length. Example ℓ3 ℓ1 ℓ2 Outdoor GB-50A unit Indoor Indoor Indoor Power ℓ4 supply ℓ5...

  • Page 9: Installation Method

    Attach two L-fittings to GB-50A using the supplied screws (Fig.5-1), then install GB-50A (Fig.5-2). GB-50A shall be installed in a control panel box (steel: thickness 1mm (3/64 in) or more). Please prepare the control panel box in consideration with installation space as shown in the Fig.5-2.

  • Page 10

    After removing the screws on GB-50A, attach two L-fittings to GB-50A using the supplied screws (Fig.5-3), then install GB-50A (Fig.5-4). GB-50A shall be installed in a control panel box (steel : thickness 1mm (3/64 in) or more). Please prepare the control panel box in consideration with installation space as shown in the Fig.5.4.

  • Page 11

    ● To secure the strength, screw pitch of 200mm(7.88inch) or less is required when DIN rail is fixed on the control board. ● Use GB-50A in a place where it receives no vibrations. Use studs as necessary to fix GB-50A. Installation and de-installation on DIN rail...

  • Page 12: Wiring Method

    Wiring Method WARNING ● All electric work must be performed according to local regulations. Improper electrical work may result in electric shock or fire. ● Be sure to shut off the power source of the unit and the all other unit to be connected to the power supply unit before wiring.

  • Page 13: M-net Transmission Line

    ● For a description of the IP address setting method, refer to section 7 Initial setting ● LAN is 10 BASE-T Specification. ● The maximum wiring length from HUB to GB-50A is 100m. ● GB-50A is connected to the monitoring PC via HUB. NOTE ●...

  • Page 14: Initial Setting

    Default User user name password Maintenance user initial init The function list of GB-50A main body, the Initial Setting Tool, and the Initial Setting Web is shown below. Initial Initial Setting Items Remarks This unit Setting Tool M-NET address setting √...

  • Page 15: How To Set The Ip Address With Dip Switches

    ● When setting IP addresses with the Initial Setting Web or the Initial Setting Tool, set all four dipswitches on SW2 to OFF. ● If the IP address of GB-50A is forgotten, check the IP address that is registered on the monitoring PC (Web or TG-2000A). GB-50A can be started by changing the setting of SW2 on GB-50A IP address and using an arbitrary fixed IP address as a temporary IP address.

  • Page 16: Test Run

    ● The operation mode other than the “Test run” mode can be selected on the Web browser. ● The format in which the Web page address for each GB-50A is expressed on the Web browser, as well as the default setting user name and password are shown below. For further detail, refer to the manual for Web browser.

  • Page 17: Example For System Configuration

    + 200”. Set the address to K transmission converter Power supply unit (Model PAC-SC50KUA) main body, and register it to GB-50A using the Initial Setting Web or the Initial Setting Tool. ● Set the master system controller function select No.4 to “OFF”...

  • Page 18

    (2) Level signal and pulse signal (DC12V or DC24V) (3) External input specification Emergency stop/normal level ON/OFF, Lead wire ON/OFF, prohibit/enable pulse signal signal level signal No.5 Orange Emergency stop/normal input ON/OFF input ON input No.6 Yellow Not used Not used OFF input No.7 Blue...

  • Page 19: External Signal Output Function

    2. External signal output function * External signal output requires the external I/O adapter (Model: PAC-YG10HA) sold separately. (1) External output When one or more air conditioners are running, the “ON” signal will be output and if a malfunction occurs in one or more air conditioners, the “Malfunction”...

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