Vicon SURVEYOR 2000 7003-00, Руководство по установке и эксплуатации

Страница: 32 / 64

Typical Relay and Alarm Connections
Alarm input and relay output type signals are also carried on individually-shielded twisted-pair cable sets. The
signals are defined in the following descriptions.
Alarms 1-4 are electronic TTL (transistor-transistor logic) type inputs that are driven by a dry contact type
switch. These signals are connected to RJ-45
Connector J2. Each input has two states, open and
closed. For example, in Figure 19, a door switch can
activate an alarm when connected to a
Surveyor2000 alarm input. As a guideline (under
normal conditions), the cable should be 22 AWG for
a 1000 foot (305 m) distance. The states correspond
to defined TTL designations as follows:
Figure 19
Typical Alarm Circuit
OPEN = HIGH and CLOSED = LOW
where: HIGH = 5 VDC and LOW = < 1 VDC
Since dry contact switches are normally defined in
terms of their inactive or “normal” state, the following
holds true:
NORMALLY CLOSED (NC) = ACTIVE HIGH
(OPEN)
NORMALLY OPEN (NO) = ACTIVE LOW (CLOSED)
Figure 20
Typical Relay Circuit
The “active” state can be programmed through the
Surveyor2000 menu system. These signals are
connected to RJ-45 Connector J3. Alarm signals
can be programmed for their status
(enabled/disabled), active level definition (high/low),
action/reset function (none, preset, aux on, aux off
or tour), acknowledgment mode (automatic/manual)
and report status (yes/no).
The relay output is an actual relay output dry
contact, which directly drives external devices. For
example, a light can be turned on and off when the
relay output is connected to the light circuit. Refer
to Figure 20. The relay output contact can be
programmed for its power-on state definition
(on/off) and output type definition (momentary or
latching).
The relay output can handle a signal of about 35
volts at 1 A typical. There is one relay output
contact located on the J3, RJ-45 Connector.
Connect the circuit to be switched to the connector
pins labeled RELAY C and RELAY NC or RELAY
NO for a normally closed or normally open
connection, respectively.
28
•
Wiring XX031-01 Rev 803 Surveyor2000 Camera Dome System