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14 Pelco Manual C1487M-D (7/99)
Figure 13. Interconnect Circuit Board Electrical Connections for Spectra Lite™
HTR/FAN
RX–
RX+
TX–
TX+
PWR IN
FUSE
1.6 A
DOME DRIVE
CONNECTOR
RS-422
CONTROL
SIGNALS
POWER
(24 VAC ONLY)
FAN
24 VAC
MIDDLE
PIN IS
GND
VIDEO
CONNECTOR
FOR OPTIONAL
TRANSLATOR
SUBASSEMBLY
5. Heater/Fan - This is a factory connection for a heater on outdoor pendant models.
6. Alarm Inputs - (Spectra II™ Only) If you need alarm inputs, connect them. The
maximum number of alarm inputs is seven. Refer to Figure 8 for a typical wiring
example. Alarm inputs require a ground signal through a contact closure, such as a
switch.
7. AUX 1 - (Spectra II™ Only) An AUX 1 command from the controller will activate
the relay output. If you need the relay, wire it as required. Refer to Figure 8. The relay
contacts are shown when AUX 1 is inactive. When an AUX 1 command is issued, the
relay contacts will reverse and remain latched until a clear command is issued.
8. AUX 2 - (Spectra II™ Only) An AUX 2 command from the controller will place a
ground at the output of AUX 2 to operate the device connected to it. The output will
remain latched until a clear command is issued. If you need the AUX 2 output, wire it
as required. Refer to Figure 8 for typical wiring examples. The AUX 2 output is an
open collector transistor driver that can pass a maximum of 150 mA at 32 VDC. It is
capable of driving TTL logic circuits or low-current reed relays. If you use an external
relay, make sure that both the supply voltage and the current requirements are well
below the maximum of 32 VDC and 150 mA. Exceeding these values will cause
permanent damage to the dome. If you are not familiar with open collector drive
requirements, contact Pelco technical support for assistance.
9. Close the door and tighten the thumbscrew securely.
Proceed to the
Dome Drive
section.
NOTE: (Spectra II™
Only)
Connect only a low
voltage device to the relay
output. Maximum current
rating of the relay contacts
is two amperes.
CAUTION:
(Spectra II™
Only)
The maxi-
mum output of AUX 2 is 150
mA. If you connect a device
that draws more current,
you could destroy the output
transistor. The output is in-
tended to drive logic circuits
or low-current devices. If
higher current is required,
connect the output to a relay.
CAUTION:
Leave
adequate slack in
the wiring to permit
the door to open without
pulling on the connectors.