Foxconn Interfacility Link 7870 User Manual

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7870 Interfacility Link Installation and User’s Guide 
  page 33
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Appendix 3 The 2380 Relay Adapter
The following section describes how to install the 2380 Relay adapter 
onto the 7180M Chassis. The 2380 Relay adapter assembly provides 
dry contact output signals as an option to the standard open collector 
signals available on the 7180M chassis backplane.
If the 2380 Relay adapter is ordered separately from the 7180M 
chassis, it must mounted by the user. The 2380 is mounted directly 
over the connectors on the 7180M backplane, as shown below.