IQH1S 1U Enclosure
SECTION 1
IQH1SINS
23/11/06
www.snellwilcox.com
Version 1 Issue 4
1.4
THE GATEWAY CARD
4 78
2 4 78
Front Panel
Connector
RollNet
FRONT PANEL CONNECTOR
When an active control panel is fitted to the unit,
this connector carries the communication signals
between the mainframe and the front panel.
COMMUNICATIONS MODE SWITCH
For operation of the RS422 serial port this switch
must remain in the DOWN position.
For operation of the RollNet port this switch must
remain in the UP position.
HEX SWITCHES
Both of these switches are used to define the Unit
Address for the equipment. They are only read at
power-up.
Position `0' on the left hand switch will disable the
RollCall™ function on the unit; all other positions
on these switches may be used to set the Unit
Address in Hex. (Left hand switch 1 to f, right hand
switch 0 to f)
If an address is already in use the RollCall™
receive and transmit LED's will flash alternately at
a 1 second rate.
The unit must then be powered-down, a unique
address selected and the unit powered-up again.
Note that the Shoebox active front panel has a
separate and different address to the Gateway.
The Gateway address can be set to zero, (which
will disable RollCall function) and all features of the
shoebox will still work
except
for the RS422 port.
Therefore if the RS422 port of the shoebox is not
needed, the second address may be saved by
setting the gateway to zero.
The front panel will still have an address if it needs
to be used.
Note that in a RollCall™ segment, all units must
have different unit addresses.
For more information see RollCall™ section.
Front Panel
Connector
RollNet
RS422
4 78
2 4 78
Hex Switches
