Communication bus and supply power table - Metasys - MS-VMA1615 - MS-VMA1626 - MS-VMA 1628 - MS-VMA1630 - Field Device - VMA16 VAV Modular Assembly

VMA1615/1626/1628/1630 VAV Controllers Installation Guide

Brand
Metasys
Product name
VMA16 VAV Modular Assembly
Document type
Installation Guide
Part number
24-10143-217
Document revision
K
Revision date
2019-10-18
Language
English
Table 1. Communication bus and supply power terminal blocks, functions, ratings, requirements, and cables

Terminal block/Port label

Terminal labels

Function, electrical ratings/Requirements

Recommended cable type 1

FC BUS 2

+

-

FC Bus Communications

0.6 mm (22 AWG) stranded, 3-wire twisted, shielded cable recommended

COM

Signal Reference (Common) for bus communications

SHLD

Isolated terminal (optional shield drain connection)

SA BUS 2

+

-

SA Bus Communications

0.6 mm (22 AWG) stranded, 4-wire (2 twisted-pairs), shielded cable recommended

Note: The + and - wires are one twisted pair, and the COM and SA PWR wires are the second twisted pair.

COM

SA Bus Signal Reference and 15 VDC Common

SA PWR

15 VDC Supply Power for Devices on the SA Bus

FC BUS

FC BUS

RJ-12 6-Position Modular Port provides FC Bus Communications

FC Bus provides 15 VDC Power for:
  • Wireless Bluetooth Commissioning Converter
  • Wireless ZigBee Field Bus Router

SA BUS 2

SA BUS

RJ-12 6-Position Modular Port provides SA Bus Communications

SA Bus provides 15 VDC Power for:

  • NS Series Sensors
  • Wireless ZigBee WRZ-78xx Series One-to-One Wireless Receiver
  • Wireless Bluetooth Commissioning Converter (BTCVT)
  • DIS1710 Local Controller Display
  • VAV Balancing Tool

24 AWG 3-pair CAT 3 Cable <30.5m (100 ft)

24~

HOT

24 VAC Power Supply - Hot

Supplies 20–30 VAC (Nominal 24VAC)

0.8 mm to 1.0 mm

(20 to 18 AWG) 2-wire

COM

24 VAC Power Supply Common

The -0 models isolate this terminal from all other commons.

The -1 models only isolate this terminal from the FC bus common.

1 See Table 2 to determine wire size and cable lengths for cables other than the recommended cables.
2 The SA Bus and FC Bus wiring recommendations in this table are for MS/TP Bus communications at 38.4k baud. For more information, refer to the Metasys IP Networks for BACnet/IP Controllers Configuration Guide (LIT-12012458). and MS/TP Communications Bus Technical Bulletin (LIT-12011034).