2-4
1. Connect to the SPST alarm relay terminals per your application. Insert your load wires and
tighten the alarm terminal screws to prevent the wires from coming loose. These contacts
are open for normal operation and close in alarm. Do not exceed 24V and 1A.
2. Verify that your load is wired to the center two terminals of this terminal block. After the
power relay is wired, replace this terminal block into its socket.
Connecting to the Ethernet Ports
This switch includes six RJ-45 ports with automatic MDI/MDI-X crossover, and automatic
10/100Mbps data rate sensing for 10Base-T or 100Base-TX connections. Automatic MDI/MDI-X
crossover allows you to connect to other switches, hubs, or workstations, without regard to using
straight-through or crossover cabling. The following figures depict the schematic diagram of
straight-through and crossover cabling. Note that crossover cables simply cross-connect the
transmit lines at each end to the receive lines at the opposite end.
Straight-through Cabling Schematic
Crossover Cabling Schematic
Note that Ethernet cables use pins 1, 2, 3, and 6 of an 8-pin RJ45 connector. The signals of
these pins are converted by the automatic MDI-X function, as shown in the table below:
