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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