Momentum Modbus Plus 170 PNT Series Guide de l'utilisateur Page 44

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Option Adapters
32
870 USE 101 00 V.2.2
Section 2.1
Introducing the TSX Momentum Option Adapters
Basic Features of Option Adapters
Introduction
This section describes the basic features of all Option Adapters:
Batteries
A time-of-day (TOD) clock
Communication port(s)
Batteries
The batteries used to back up the CPUs user program and state RAM.
Time-of-Day
Clock
The time-of-day clock allows you to use the date and time as an element in your
user program.
Communication
Ports
The three TSX Momentum Option Adapters are distinguished by the
communications ports they offer, as shown in the table below:
Option Adapter Communication Port(s)
172 JNN 210 32 Software-selectable RS232/RS485 serial port
172 PNN 210 22 One Modbus Plus port
172 PNN 260 22 Two Modbus Plus ports for a redundant (back-up) cable run
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