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8 C3412M-D (12/08)
SW2 SWITCH 3: CONTROL SYSTEM COMPATIBILITY
Coaxial Control Systems
Although Spectra IV/Spectra IV SE dome systems can operate with coaxial control systems from many manufacturers, the
system is designed for optimal performance with Pelco Coaxitron
®
control products within the length specified for coaxial
cable.
To compensate for coaxial control systems from other manufacturers, Pelco has provided DIP switch SW2-3. Setting
SW2-3 to the ON position may improve dome control with these control systems.
If you are using a Pelco Coaxitron controller, leave SW2-3 in the default OFF position.
Notes:
• This coaxial control system compatibility feature is only available for dome drive revisions A4 and later (revisions A0
and later for Spectra IV Horizon dome drives). The revision number can be found on the barcode label on the top of
the dome drive. Software version 1.090 and later indicates this mode is available by placing an asterisk next to the
switch number in the Dip Switch Information menu.
• In some configurations, Pelco CM9502 Series matrix systems use nonstandard Coaxitron commands for functions like
pattern playback. If you experience problems with these functions, set SW2-3 to the ON position.
Pelco P Protocol Control Systems
To compensate for Pelco P protocol control systems from other manufacturers, set SW2-3 to the ON position. This may
improve dome control with some of these control systems.
SW2 SWITCHES 4–5: SERIAL PORT SETTINGS
RS-422 Setting (Default)
SW2-4 and SW2-5 should both be set to the OFF position for RS-422 setting.
For control, only two wires should be connected to the RX- and RX+ connectors on the circuit board inside the back box. For
bidirectional control, four wires should be connected to the RX-, RX+, TX-, and TX+ connectors on the circuit board inside
the back box.
RS-485, 4-Wire Setting
SW2-4 should be set to OFF and SW2-5 should be set to ON if a 4-wire serial port connection is used with RS-485.
Note: This setting is most commonly used with Pelco Endura
®
systems.
RS-485, 2-Wire Setting
SW2-4 and SW2-5 should both be set to the ON position if a 2-wire serial port connection is used with RS-485.
This setting is used to allow the Spectra dome system to transmit and receive commands on the same pair of wires. Only
two wires should be connected to the RX- and RX+ connectors on the circuit board inside the back box.