—
8
—
Relay1
Relay2
Relay1
Relay2
The fault circuit will open if::
1.
A relay warning event is triggered, OR
2.
The EDS-505A/508A is the Master of this Turbo Ring, and the Turbo Ring
is broken, OR
3.
Start-up failure.
If none of these three conditions is met, the fault circuit will remain closed.
Wiring the Redundant Power Inputs
The EDS-505A/508A unit has two sets of power inputs—power input 1 and
power input 2. Top and front views of one of the terminal block connectors are
shown below.
V1- V1+
PWR1
V2- V2+
PWR2
PWR1
PWR2
V1- V1+
V2- V2+
Take the following steps to wire the redundant power inputs:
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 the EDS’s top panel.
ATTENTION
Before connecting the EDS to the DC power inputs, make sure
the DC power source voltage is stable.
Wiring the Digital Inputs
The EDS-505A/508A unit has two sets of digital inputs, DI 1 and DI 2. Each
DI consists of two contacts of the 6-pin terminal block connector on the EDS’s
top panel. The remaining contacts are used for the EDS’s two DC inputs. Top
and front views of one of the terminal block connectors are shown below.
I
1
D 2
I
I
2
D 1
I
I
1
I
2
D 2
I
D 1
I
