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Operation

intercom system. There is no apparent difference to keypanel operators, but what actually occurs in the system electronics is

slightly different.

When a keypanel operator activates a key to talk to a destination located in another intercom system, the intercom system’s

master controller does not act itself to close any crosspoints, but rather, it sends this information to the trunking system via the

data connection. The trunking system master controller then checks for an available trunk line. If one is available it notifies the

master controllers in the affected intercom systems to establish the communication path using the trunk line that it specifies. If

no trunk lines are available, the trunking system will notify the master controller in the caller’s intercom system, which will

then send a “busy” signal to the calling keypanel.

If more than two intercom systems are interconnected, additional trunk lines must be reserved and interconnected between the

systems. However, it is not always necessary that two intercom systems be reserved and interconnected as long as there is a

path somewhere to connect the two systems. The trunking system can be programmed to permit “cascaded” trunking in which

a pathway is established through multiple intercom systems to connect two endpoints.

UIO-256 Input/Output Frame

General Description

Each UIO-256 provides 16 GPI inputs and 16 GPI outputs. The GPI inputs can be used just like keypanel keys to activate

intercom ports, party lines, relays, etc. Each relay output provides a choice of normal open and normal closed contacts. The

relays can be assigned for activation from keypanel keys, and can be used to control lighting, or to key remote transmitters,

paging systems, etc.

General Theory of Operation

The UIO-256 exchanges control signals with the intercom system via an RS-485 data connection. Each UIO-256 also has a

data output and input connector pair for connection of additional UIO-256 frames. Up to three additional UIO-256 frames may

be interconnected with a token ring configuration, where the data output of one frame is connected to the data input of the

next. The last UIO-256’s data output line is connected back to the data input of the first UIO-256. DIP Switches at each UIO-

256 are set so that each frame controls a unique range of GPI inputs and GPI outputs. Up to 15 UIO-256 Frames may be

interconnected using multi-drop configuration. Please note that the multi-drop configuration requires version 2 of the UIO-256

firmware.

For more information on the UIO-256, see the UIO-256 User Manual.

GPI inputs are connected via a 50-pin telco connector on the back of the UIO-256. Each input requires +5 to +18 VDC for

activation. The positive input and common connections may be provided from a remote source. Or +18 VDC is supplied at the

connector by the UIO-256 and may be used for input activation, with the user supplying the external switch.

UIO-256 Connection

One UIO-256

1. Connect J2 of the UIO-256 to J902 of the ADAM CS. The interconnect cable should be wired as shown in Figure 8 on

page 16. If a program assign panel is also being used, it may be wired to the same connector as show in Figure 8.

2. Set the SW-1 DIP switches on the back of the UIO-256 to select range 1-16 as shown in Table 6 on page 21. The SW2 DIP

switches are not used and their positions do not matter.

3. For a pin-out of the relay connector, refer to Table 5 on page 21. For a pin-out of the opto-isolator connector, refer to

Table 6 on page 21.

4. Connect AC power to the UIO-256.

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RTS KP95 Guía de instalación Pagina 16