NEC 616 manual PiT=q p7i-l

26043 Security Control Equipment

Provision has been made to allow connection of a

locally-provided security control system. For this purpose the PBS-S KTU contains 2 individual control circuits that, when activiated, provide an audible alarm through all idle keyset speakers and a visual alarm on each keyset display. Each security circuit can be activiated by means of an external make (closed) or break (open) contact. The SW1 switch on the PBS-S KTU is used to set the desired break or make detection for security circuit one and the SW2 switch performs the same function for security circuit two.

For connection information to the MDF see Figure 260-3 and 260.4 and Table 240-3.

1M - - 18 2M - - 20

piT=q p7i-l

SW1SW2

Fig. 260-2 PBS-S Security Control Switches

260.9 External Amplifier Control

A set of dry contacts is provided on the PBS-S KTU, which can be used to control an auxiliary relay for External Paging. Although this option is not required when an external amplifier is used, it may be desired in some applications. When an external page is activiated the EAS and EAM contacts are closed for the duration of the page. In the idle condition the closure is made between the EAS and EAB contacts. See Figure 2604 and Table 240-3 for connection information to the MDF.

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