RAD Data comm LRS-24 - Manual (Page 54)

Chapter 2 Installation and Setup LRS-24 Installation and Operation Manual
2-26 Interfaces and Connections
The external feed voltage passes through the interface module and through the
corresponding PS module to the internal bus. Therefore, you can ensure constant
external feed voltage (in case one of two installed power supply modules is
removed) by connecting LRS-PS-FEED to both modules.
It is recommended that you turn on the external voltage source only after LRS-24
is turned on.
Station Clock Connections
➤ To connect an external (station) clock signal to LRS-24:
1. Connect the clock source to the STATION CLK connector located on the
interface module serving the CM-1 or CM-2 module, using a Shielded Cable.
2. Select the required clock.
When configured to External, but no External Clock is connected, Internal Clock is
applied.
Dry Contact Alarm Connections
The CM-2 module enables the connection of major and minor alarm relay
contacts to a bay alarm system. Connect the bay alarm cable to the STATION CLK
connector located on the interface module serving the CM-2 module. Table 2-10
lists the STATION CLK connections.
Table 2-10. CM-2 Module STATION CLK Connector, Pin Allocation
Pins Function/Connection
3, 11 STATION CLK In
1, 9 STATION CLK Out
7, 8, 15 Major Alarm
6, 13, 14 Minor Alarm
2, 4, 5, 10, 12, N. C.
Management Connections
Refer to the installation plan to determine the cable intended for connection to the
enclosure. Management connections depend on the type of module installed in
LRS-24.
CM-1 Module
Connect the supervisory cable to the MANAGEMENT RS-232 connector on the
LRSI-F-CM1 interface module.
CM-2 Module
Connect the management cable to the MANAGEMENT Ethernet connector
(an RJ-45 connector on the LRSI-F-1-CM2 interface module and a BNC connector
on the LRSI-F-2-CM2 interface module).
Note
Note
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