Ltc 8901 Series Cpu Relay Outputs And Buzzers - Bosch LTC 8900 Series Installation Manual

en | Hardware Installation Procedure for Redundant System Configuration Utilizing LTC
50
8901 Series CPU
3.
4.
5.
6.
7.
The System Supervisor on-screen diagram should now indicate a fully operational system and
the Controller Activity LED on the LTC 8901 CPU bay should be blinking.
NOTE: Since the LTC 8943/95 PC is intended to configure and monitor the operation of the
LTC 8900 system, it is strongly recommended that the PC be used solely for this purpose. It
should not be used as an operator s workstation, or for any other purpose that could interfere
with its ability to provide automatic switchover functions.
6.16

LTC 8901 Series CPU Relay Outputs and Buzzers

The LTC 8901 Series main CPU bay provides five relay outputs that can be connected to
devices to alert the operators if a failure is detected.
Figure 6.12: LTC 8901 CPU Rear Panel Relay Outputs
, page 50 defines the operations of the relay outputs. Dry contact relays with the following
specifications are used:
Maximum load
Contact material
Minimum permissible load
The last two contacts of the Relay Out connector are actually inputs to the system. These
contacts (pins 11 and 12 on the Relay Out connector) can be shorted together to disable the
front panel buzzers on the LTC 8901 Series bay. If not disabled, these buzzers will sound if a
LTC 8901 Series failure is detected. These contacts may be connected to a toggle switch to
allow switchable disabling of the buzzers.
Connector
Positions
1 & 2
3 & 4
5 & 6
2015.01 | 10.6 |
After the PC enters the Windows desktop screen, the Allegiant server program should
start automatically. If the automatic feature has been disabled, find and double-click the
Allegiant icon to open the Allegiant Server program.
When the login Information box appears, login as Installer level using the Password 1.
Select File, Open, and load the Default.Alg file. This default file automatically configures
the communication ports to their default settings.
After the file has loaded, the table will appear on the screen. Click On-Online in the menu,
then select Go-Online. After 20-30 seconds, the software will go on line and the System
Supervisor selection box will appear.
Select the Primary CPU, and check the enabled data mirroring checkbox, then click OK.
Relay Out
1 2 3 4 5 6 7 8 9 10 11 12
Functions
Relay - Primary Power Supply Fault Normally open, closes when Primary Power
Relay - Primary CPU Fault
Relay - Backup Power Supply Fault Normally open, closes when Back Power
1.0 A at 24 VAC, 40 VAC peak
Ag (Au clad)
10 mVDC, 10 A
Description
Supply failure is detected
Normally open, closes when Primary CPU
failure is detected
Supply failure is detected
Installation Manual
LTC 8900 Series
Bosch Security Systems, Inc.