Operation, Alarm Inputs, Alarm Output | Philips TC8275, TC8277

4.6Alarm Inputs and Output (Accessory Output)

4.6.1TC8277 Series and TC8278 Series

The 609 mm (24 in) cable, with 15 pin connectors provided with the VidQuad® units, are for use with the mating alarm input, output and accessory connectors. These cables can be cut to desired length, and the end insulation stripped off for connecting external devices.

4.7Alarm Inputs

4.7.1TC8277 Series and TC8278 Series

The alarm inputs are defaulted to be normally open. These can be individually changed to normally closed via the Alarm menu.

CAUTION: Do not apply external voltages to the alarm inputs.

Belden 8760 twisted shielded cable (or equivalent) should be used for wiring to the alarm connector and the total length of unshielded cable should not exceed 10 cm (3.9 in) on each connector port to maintain compliance with Directive 89/336/EEC.

Use only isolated closures or open collector logic. Precautions should be taken, particularly on long runs, to prevent pickup of spurious signals from associated wiring which may give false inputs or damage the unit. Refer to the Alarm/Accessory Connector - Pin-Out under

ILLUSTRATIONS.

4.8Alarm Output

4.8.1TC8277 Series and TC8278 Series

The alarm output is a relay which is configured to be normally open. The relay contacts can handle up to 1 ampere at 40 volts AC/DC and will close upon alarm input to the unit. The video loss output is a logic low. Refer to the Alarm/Accessory Connector - Pin-Out under

ILLUSTRATIONS.

5 OPERATION

5.1Menu Operation

In setup mode, the user has access to on-screen menus for programming system settings and installation data such as:

Titles

Alarm Operation

Sequencing Operation

Time/Date Setup

Password Setup

Remote Configurations

For an overview of operator programmable menu options, refer to Menus Flow Chart under ILLUSTRATIONS.

Menu operation is password protected to prevent unauthorized access, and can be set by the user.

Although the menus include "EXIT" selections, the MENU button can be pressed at any time while in the menus to immediately exit the setup mode and return to normal operation. Any programming made up to the "menu" exit time will be saved.

5.1.1Initiating Menu Programming

To start a menu programming session, press the MENU button.

The operator will be prompted to enter a password, consisting of a three button sequence of the front panel buttons. The password can be programmed by the operator.

The factory setting for the password is SELECT, SELECT, SELECT.

Note that the SELECT button is not normally a valid password button and cannot be used in a new password when it is set by the operator. The only time that this button is used in the password is as a factory default on new units. Buttons which are used in normal MENU operation - the MENU, SELECT and ARROW buttons - are not valid as password buttons. All others are valid.

Once the correct password has been entered, a main menu will be displayed, showing each of the major sections that can be programmed by the operator. In general, the on- screen prompts will be all that are needed to guide the operator through the steps to select and program the options.

Each screen prompts the operator on the correct buttons to use for various options and functions.

5.1.2Selecting Menu Items

Move up and down through the menu by using the up and down arrow buttons, and choose a menu item by pressing the SELECT button. This will bring up a new screen which allows the operator to select options or enter data related to the menu item which was chosen.

Option Selection

In menu screens where items in a list must be turned ON or OFF, use the left or right arrow buttons to toggle the status of the current entry, then press the down arrow button to move on to the next entry. The up or down arrow buttons are used to skip over or select entries on the screen. When there are more entries than can be displayed on one screen, the screen will scroll automatically when the down arrow is pressed on the bottom entry. The up arrow can be used to scroll up to preceding entries if needed. Press SELECT when done to exit the screen.

5.1.3Data Entry

Some menu screens provide a means for the operator to enter numeric or alpha-numeric data. In these menus, a current cursor indication is provided by means of the "Up- Arrow" character below the position at which data is to be entered. The up and down arrow buttons will then cycle through the displayable character set, while the left and right arrow buttons are used to move to subsequent or preceding character locations. Once all characters have been set up correctly, the SELECT button will confirm the data entry and call up the subsequent camera, if applicable. If there is no subsequent camera, then SELECT will return the operator to the main menu.

5.1.4Terminating Menu Programming

Menu programming can be terminated at any point by pressing the MENU button again.

All changes are automatically saved by the system as they are made. Settings are retained even on loss of power.

TC8275, TC8278, TC8277 specifications

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