Honeywell International Inc. RTU-L19 Manuale Utente
1.5.5 Output Cable Relay 1- Door Open
The Relay 1 output is used for door control. It makes both NO and NC
contacts available.
contacts available.
The external load can be powered directly by AC or DC, in accordance
with the following limits:
with the following limits:
-
Minimum Load: 12VDC / 10mA
Voltage
Working Current Peak Current
max 0.5 Sec
(inductive load)
(inductive load)
Suppressor
12VDC 3A
10A
1N4004
Diode
30VDC 2A
10A
1N4004
Diode
42VDC 0.5A
7A
1N4004
Diode
42VAC 0.5A
7A
MOV
75Vrms
• Inductive load with direct current:
In this case it is mandatory to use the 1N4004 diode, which is provided,
(or an equivalent) in parallel to the coil of the electrical locking device, to
increase the life of the relay inside the RTU – see Figure 9.
(or an equivalent) in parallel to the coil of the electrical locking device, to
increase the life of the relay inside the RTU – see Figure 9.
• Inductive load with alternating current:
In this case it is mandatory to use the MOV (75VAC), which is provided,
(or an equivalante) in parallel to the coil of the electrical locking device,
to increase the life of the relay inside the RTU
(or an equivalante) in parallel to the coil of the electrical locking device,
to increase the life of the relay inside the RTU
− see Figure 10.
• Life: assuming the relay is activated 200 times a day and that the
voltage/current limits of the preceding table are respected, the life is
guaranteed for at least 6 years; if the relay is activated less frequently,
the life of the relay increases proportionally.
guaranteed for at least 6 years; if the relay is activated less frequently,
the life of the relay increases proportionally.
In case of excessive use (> 200 operations / day) it is suggested to use
an external relay.
an external relay.
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