Installation guide

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Wiring the Alarm Contact
The Alarm Contact consists of the two middle contacts of the terminal block on
EDS’s top panel. You may refer to the next section for detailed instructions on
how to connect the wires to the terminal block connector, and how to attach the
terminal block connector to the terminal block receptor.
In this section, we explain the meaning of the two contacts used to connect the
Alarm Contact.
FAULT
FAULT
Top View
Front View
FAULT: The two middle contacts of the
6-contact terminal block connector are used to
detect both power faults and port faults. The two
wires attached to the Fault contacts form an open
circuit when:
1. EDS has lost power from one of the DC
power inputs.
OR
2. One of the ports for which the corresponding
PORT ALARM DIP Switch is set to ON is
not properly connected.
If neither of these two conditions is satisfied, the
Fault circuit will be closed.
Wiring the Redundant Power Inputs
The top two contacts and the bottom two contacts of the 6-contact terminal
block connector on EDS’s top panel are used for EDS’s two DC inputs. Top
and front views of one of the terminal block connectors are shown here.
Top View
Front View
STEP 1: Insert the negative/positive DC
wires into the V-/V+ terminals.
STEP 2: To keep the DC wires from
pulling loose, use a small flat-blade
screwdriver to tighten the wire-clamp
screws on the front of the terminal block
connector.
STEP 3: Insert the plastic terminal block
connector prongs into the terminal block
receptor, which is located on EDS’s top
panel.
ATTENTION
Before connecting EDS to the DC power inputs, make sure the
DC power source voltage is stable.
Communication Connections
EDS-308 models have 6, 7, or 8 10/100BaseT(X) Ethernet ports, and 2, 1, or 0
(zero) 100BaseFX (SC/ST-type connector) fiber ports. EDS-305 models have 4
or 5 10/100BaseT(X) Ethernet ports, and 1 or 0 (zero) 100 BaseFX
(SC/ST-type connector) fiber ports.