Mvs Lightning Protection - Emerson FloBoss 107 Instruction Manual

6.4 MVS Lightning Protection

Issued Feb-07
All MVS units are sent from the factory with a default
Note:
interface address of 1. This allows you to accomplish
first-time communications.
Once you set a unique address for each MVS in the multi-drop
7.
configuration, connect like terminals to like (that is,
electrically connect all the "A" terminals on the devices to the
FB107 "A" terminal, and so on). The wiring must be done
entirely from the FB107 (daisy-chained) though each remote
MVS as shown in Figure 6-2.
Figure 6-2. MVS Multi-Drop Configuration
Notes:
Do not use Address 240 in multi-drop applications,
because all MVS devices with this address try to respond to
requests from the FB107.
When configuring a multi-drop MVS setup, connect each
MVS to the FB107 one at a time. Ensure that each MVS is
functioning correctly before you install the next MVS.
To safeguard against lightning strikes, install surge suppression
devices. The following commercially available lightning protection
modules have been found to meet requirements:
Model Number LPC 10643 – 485: Protects the communication
pair (A and B terminals).
Model Number LPC 10643 – 1: Protects the power and ground
pair (PWR and GND terminals).
Multi-Variable Sensor (MVS)
FloBoss 107 Instruction Manual
6-5