Battery Installation For Real Time Clock (Rtc); Galvanic Isolation Barriers - Siemens BT300 Installation Instructions Manual

Option Board Type
BT300-OPT-B9-V I/O expansion board with one relay output and five 42 to 240 VAC digital inputs (1x RO, 5x DI [42 to
240 Vac])
BT300-OPT-BF-V I/O expansion board with one analog output, one digital output, and one relay output (1x AO, 1x DO,
1x RO)
BT300-OPT-BH-V I/O expansion board with three individual temperature measurement channels (NI100 Sensor Card)
BT300-OPT-C4-V LonWorks
Siemens Industry, Inc.
Building Technologies
Board Description
For more information about the installation and operation of the option boards, see the
Siemens BT300 Option Boards User Manual
LonWorks Option Board Installation and User's Manual

Battery Installation for Real Time Clock (RTC)

Real Time Clock (RTC)
To enable the
Siemens BT300 HVAC Drive.
Use a 1/2 AA battery with voltage of 3.6V and capacity of 1000 to 1200 mAh (for
example, Panasonic BR-1/2 AA or Vitzrocell SB-AA02). The battery will last
approximately ten years.
The place for the battery can be found in all frames left to the control keypad (see the
Control Unit
figure in the section on page [➙ 49]).
Detailed information on the functions of the Real Time Clock (RTC) can be found in the
Siemens BT300 HVAC Drive Operator's Manual

Galvanic Isolation Barriers

The control connections are isolated from line voltage potential and the GND terminals
are permanently connected to ground. See the following figure.
The digital inputs are galvanically isolated from the I/O ground. The relay outputs are
additionally double-isolated from each other at 300 Vac (EN-50178).
Siemens BT300 HVAC Drive Installation
Instructions
Chapter 5 - Control Unit
Battery Installation for Real Time Clock (RTC)
(DPD01158) and the
(DPD01157).
functions, a battery has been installed in the
(DPD01809).
Insertable in
Slots
C, D, E
C, D, E
C, D, E
C, D, E
Siemens BT300
61 | 82
DPD01148
2016-06-28