View source for MRBD - Relay Board

[[Image:99702 RS.jpg|thumb|250px|The MRBD board]]

== Highlights ==
* Equipped with 6 dual changeover relays and relay drivers
* Powered by +24 VDC
* Connector for 6 RCOs + 2 GND reference signals
* Connects to the AlphaCom Subscriber Connection Board through a 1:1 cable
* Fastens onto mounting rail in AlphaCom exchange

==Additional Documentation==
For more documentation please see http://www.zenitel.com/product/product/mrbd

== Connectors and Switches ==
[[image:MRBD-1.PNG|thumb|left|600px|Connectors and switches on MRBD board]]
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The jumpers S1-S6 determine if the RCO should be activated by a high or low level. High level is used in AlphaCom system, while low level was used in the previous TouchLine generation of intercom system.

== Connections ==
=== AlphaCom XE7 ===
In the XE7 the cable is connected to the 8-pin pinheader labeled '''RCO 1-6''' or '''RCO 7-12'''.

* An [[ASLT|ASLT board]] in board position 1 is required to operate RCO 1 - 6.
* An [[ASLT|ASLT board]] in board position 2 is required to operate RCO 7 - 12.
[[Image:DoorOpening E7.jpg|thumb|300px|left|Connection of MRBD in an AlphaCom XE7]]
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=== AlphaCom XE20/26 ===

[[File:RCO XE20.PNG|thumb|500px|left|Connection of MRBD in an AlphaCom XE20]]
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In an AlphaCom XE26 the 24VDC power is provided by the [[PDB|Power Distribution Board PDB]].

==Related Articles==
*[[Turbine Compact and MRBD]]

[[Category:Hardware]]
[[Category:Additional equipment]]