Bosch Appliances 8555 manual Configuration using LTC 8712 Series Console Port Expander

LTC 8555 Series Instruction Manual Installation EN 17

The modem on the Allegiant side must be set to an auto answer mode, and the modem on the keyboard side must be set to an originate mode. In some cases, modem settings are configured via dipswitches found on the back of the modem. In other cases, the modem must be connected to a PC for configuration. The below settings represent the dipswitch configuration required for US Robotics Sportster modems.

Allegiant side Modem			Keyboard side Modem
Dip Switch	Setting	Modem Function	Dip Switch	Setting
1	DOWN	DTR Override	1	DOWN
2	UP	Verbal Result Codes	2	UP
3	DOWN	Display Result Codes	3	DOWN
4	UP	Echo Offline Commands	4	UP
5	DOWN	Suppress Auto Answer	5	UP
6	DOWN	Carrier Detect Override	6	UP
7	DOWN	Load Factory Defaults	7	DOWN
8	DOWN	Smart Mode	8	DOWN

5.3.5Console Expander Configuration When Using RS-232 Model Keyboards

RS-232 model keyboards may be connected to an Allegiant system using the LTC 8712 Series Console Port Expander, as shown in Figure 8. An LTC 8712 Series Console Port Expander can be configured to support up to four RS-232 Keyboard connections. Other devices, such as a PC running the Allegiant Master Control software, can be connected to the unused ports of the Port Expander. Because the Port Expander supports only a single baud rate for the external connections, and the RS-232 keyboards require 9600 baud, all external devices connecting to the Port Expander must be configured to for operation at this setting.

Allegiant system main

CPU bay

LTC 8712 Expander

4 3 2 1

User-supplied female 9-pin D connector.

Refer to text regarding setup of the Allegiant

&LTC 8712 to operate in Allegiant Keyboard

mode.

User-supplied cable or other link suitable for

full duplex RS-232 transmissions at 9600 baud

3 m (10 ft) data/ power cable supplied with keyboard

Junction box & power adapter supplied with LTC 8557 kit

Expander pin 2 (Rx) to Tx of link or directly to pin 3 of LTC 8557 box.

Expander pin 3 (Tx) to Rx of link or directly to pin 2 of LTC 8557 box.

Expander pin 7 (Gnd) to Data Gnd of link or directly to pin 1 of LTC 8557 box.

Figure 8: Configuration using LTC 8712 Series Console Port Expander

On Allegiant systems with a Printer port, up to two Console Port Expanders can be connected, supporting a total of eight RS-232 model keyboards.

To configure an Allegiant system to operate with an LTC 8712 Console Port Expander, you must have access to the Allegiant CPU’s dipswitches, the PC-based LTC 8059 Master Control Software, and possibly an Allegiant keyboard.

Bosch Security Systems 29 August 2003