Setting the EOL switch - Metasys - MS-VMA1826-x - MS-VMA1832-x - Field Device - VMA18 VAV Modular Assembly

VMA1826/1832 VAV Controller Installation Guide

Brand
Metasys
Product name
VMA18 VAV Modular Assembly
Document type
Installation Guide
Part number
24-10143-373
Document revision
K
Revision date
2019-10-18
Language
English

Each field controller has an EOL (End of Line) switch, which, when set to ON (up), sets the field controller as a terminating device on the bus. See Figure 1 for the EOL switch location on the field controller. The default EOL switch position is OFF (down).

Figure 1. EOL switch positions
To set the EOL switch on a field controller:
  1. Determine the physical location of the field controller on the N2 or FC Bus.
  2. Determine if the field controller must be set as a terminating device on the bus.
    Note: Refer to the N2 Communications Bus Technical Bulletin (LIT-636018) for the N2 bus EOL termination rules. Refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034) for the FC bus EOL termination rules.
  3. If the field controller is a terminating device on the N2 or FC Bus, set the EOL switch to ON. If the field controller is not a terminating device on the bus, set the EOL switch to OFF.
    Note: When the EOL switch is set to ON, the LED light on the face of the controller is illuminated.