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Magnum VS –48 Vdc User Manual Page 17
Figure 2.8-3 Bottom Shelf GMT Fuse Connections
2.9. Monitoring and Relay Output Connections
Front Panel DB9 Connection
The front panel DB-9 connector is used to hook up a standard RS-232 cable (such as APC part number 0129-XX.
A 0129-6 is included with this manual. ). This will allow local access through a Terminal Emulation program such
as HyperTerminal™ or ProComm. ™
RJ45 Ethernet Connector
The management card has an RJ-45 connector to support a TCP/IP protocol over a 10/100 BaseT Ethernet Local
Area Network (LAN).
Major, Minor and Relay 1 Output Connections
There are three output relays available that provide outputs via Form “C” contacts. The output relays are named
Minor, Major and Out Relay 1. Various system alarm conditions can be assigned to any of these three output
relays. Most alarm conditions are shipped programmed to Minor or Major Relay. Wago connectors are located on
the backplane card mounted in the left rear of the unit. Refer to the board layout in Figure 2.9-1 for Output Relay
connections. The Wago connectors accept wires 26 AWG to 20 AWG (0.129 mm
2
to 0.518 mm
2
). To connect the
relay output, remove ¼ in (6 mm) of insulation from the end of the wire. Push down the white tab on the Wago
connector, insert the stripped wire and release the tab to make the connection. The relay contacts should only be
used to switch resistive loads of 0.5 A or less at 60 V or less. Figure 2.9-2 shows the alarm output connection
designations. Whenever possible use the common and normally closed contacts. If the alarm wiring gets pulled
loose, or the controller is removed, you will get an alarm. The Major relay is energized (C-NO contacts closed)
during normal (non-alarm) operating conditions; the other relays energize when an alarm condition occurs. If your
Major relay wiring uses the C-NO contacts, then a major relay output will be seen whenever the controller is
removed from the shelf.