IQH3A IQ 3U Modular Enclosure
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Installation
Issue 2 Rev 2
Page 24
©
2014 Snell Limited
3.10 Front (Gateway Card) Controls and LEDs
Front Panel connectors, controls and LEDs are provided by the Gateway Card, fitted into a
dedicated slot in the 3U enclosure.
3.10.1 Front Panel Connector
This connector connects to the front panel AND provides the drive power to the LED on the
front panel.
3.10.2 Mini 10-way Connector
This connector offers RollCall serial RS-232/422 connectivity, allowing easier configuration for
3U boxes where rear access is limited. Use part No. SAAN RCSCGW1X to connect to this.
3.10.3 HEX Switches
Both of these switches are used to define the Unit Address code for the equipment.
Position 0 on the upper switch will disable the RollCall function on the unit; all other positions
on these switches may be used to set the Unit Address code in Hex. (Upper switch 1 to f,
lower switch 0 to f). This code will be appear on the 2-digit, 7-segment display.
If a code is already in use the RollCall receive and transmit LEDs will flash alternately at a
1-second rate.
3.10.4 LEDs
LEDs are provided along the front edge of the Gateway Card, shown in the diagram above.
Note:
In a RollCall local network, all units must have different unit address codes.
