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August 2012 – Ed.1.2

EQUITEL – E451 Technical manual

Page 7

1.8 Factory default values recovery

To recover the system factory default values such as network configuration, access password, working mode,

audio parameters…please keep pressed the recovery button for 6 seconds (

in Figure 4).

1.9 Input contact connector

The input contact is “normally open” between the 2 pins male connector terminals (

in Figure 4), with the

following pin-out:

Pin Signal Description

1 IN+ Input

2 IN- Ground for input

The input contact activation is carried out by joining the corresponding line (IN+) with the common (IN-).

The opto-isolated input internal electrical scheme of is shown in the following figure:

Figure 5. Electrical scheme of the input contact

1.10 Output contact connector

The output contact is a free-of-voltage dry contact between the two male connector terminals (

in Figure

4):

Pin Signal Description

1 OUT_A Output A

2 OUT_B Output B

This contact supports a maximum current of 1A.

The internal structure of the “normally open” relay output is the one shown in Figure 6.

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Equitel E451 Installationshandbuch Seite 11