Mitsubishi Electric Air-conditioner Network System
Central Controller
Model: GB-50A
Installation Manual
Contents
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.
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. Allowable length of M-NET transmission lines.........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
1. How to set the IP address with dip switches .........14
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
2. To use system controllers on multiple units ..........16
10. External Input/Output Usage Method ......................16
1. External signal input function ...............................16
2. External signal output function .............................18
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