VISORNET - Installation
I-9
Doc. DM245-I
Rev. 7.0
Each input has a microswitch in order to configure the type of input used. The
possible combinations are:
Type of inputs 1 (AISL) 2 (AISL) 3 (RSER) 4 (RPAR)
RELAY N.O.
3
Not supervised
ON ON ON ON
RELAY N.O. Supervised
ON ON ON OFF
RELAY N.C.
4
Not supervised
ON ON OFF OFF
RELAY N.C. Supervised
ON ON ON OFF
VOLTAGE SOURCE
OFF OFF ON OFF
POWER SUPPLY
OFF OFF ON OFF
Table 1.1. Configuring the different types of inputs
Relay/button/switch normally opened, not supervised
This is the simplest case. The device detects activation when a contact is closed,
when this would normally be open.
Relay/button/switch normally closed, not supervised
In a similar way to the above case, the difference being that the inactive level is when
the contact is closed and this must open in order to pass to an active state.
Supervised input: Sabotage detection
The supervised input is applied in the cases of contacts normally being open as well as
for those that are normally closed. This basically consists in detecting sabotages in
the external device line. Such detection can be especially important in detection
devices for presence or alarm. Possible sabotage could consist of bridging the cable
(with normally closed contacts) or to cutting it (with normally opened contacts).
For line supervision, the external device must have a serial 1K termination resistor
(for normally closed) or in parallel (normally open). 1K is the recommended
resistance value, although this can vary slightly without affecting operations. Consult
the device technical characteristics to verify if they are compatible with this operating
mode.
Voltage source
In cases where the input is not passive, as in the previous sections, optic insulation is
recommended between the external device the VisorNet 4c (this insulation is
3
N.O. Normally open
4
N.C. Normally closed
