Mircom TX3 Series Installation Manual download pdf (Page 32)

32 (53) TX3 Touch Screen Installation Manual Version 1.3

Touch Screen System and Setup

Figure 16 shows the connectors at the bottom of the Telephone Access controller.

Figure 16. Controller Board Connectors - Bottom

3.4 Grounding the Touch Screen

Grounding reduces the risk of electrical shock by providing an alternate escape

route for the electrical current. Touch Screen is equipped with a 16 gauge

electrical wire attached to the panel chassis ground post as shown in Figure 14.

To ground the Touch Screen attach one end of the supplied cable to a suitable

grounding wire and connect it to the site ground.

3.5 Connecting to the External Power Supply

The power supply terminal block is situated the middle of the Touch Screen

Controller board panel as shown in Figure 14 and receives 24 Vdc from the

external MD-990 power supply.

The external MD-990 power supply connects to the building power AC power

supply. A voltage selectable switch is located on the side of the unit and is factory

set to 120 V.

For best operation install the external power supply into its own dedicated

electrical outlet to protect it from excessive power surges and current

fluctuations.

LED/LAMP

Supply

Microphone

Connection

Speaker

Connection

Input 1

Input 2 Input 3 Input 4

Input 5

Camera Supply

Power Supply for TX3

RS-485 OUT

- +

- s +

RS-485 IN

- s +

- +

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Mircom TX3 Series Installation Manual Page 32