Beijer Electronics Fax 801-466-8792 Web www.beijerelectronicsinc.com Phone 801-466-8770
C
HAPTER
5.
QTERM-IV H
ARDWARE
5.1
Handheld QTERM-IV
The dimensions of the handheld version of the QTERM-IV
are shown in Figure 4-1. This figure also shows the stan-
dard keypad legend for the bottom five rows of the 24-key
keypad (the top row is labeled to user-specifications).
The housing is made from impact-resistant ABS and is col-
ored black. The housing is not waterproof, but it can be
subjected to moderate rain or splash without harm.
The handheld QTERM-IV uses either a 6-pin Modular or
an optional DB9 female for connection to the external
cable. The unit can be ordered with either connector exiting
from the top or the bottom of the housing. If desired, the
6-pin Modular connector can easily be switched from one
end of the housing to the other.
The pin assignments for the connectors for each of the
available interfaces are shown in Table 5-1 (The lines dig0
and dig1 are discussed in section 5.5.3.). Figure 5-3 shows
the pin numbering for each of the connectors used in the
QTERM-IV. For reference, Table 1-5 (at the end of this
chapter) shows the pin assignments used by the COM ports
on PC-style computers for both DB25 and DB9 connectors.
5.2
Battery Back QTERM-IV
When ordered with the battery back, the handheld
QTERM-IV does not have any power connection, i.e. the
+V pin on the external connector is not used.
The battery back uses six “AA” size alkaline batteries. Typ-
ical battery life is shown in Table 5-3. Dimensions of the
handheld with battery back are shown in Figure 4-1.
The battery back includes a power-supply board with an on/
off switch. This board generates 5 volts DC from the batter-
Handheld
Bat
t
ery Bac k
Figure 4-1. Dimensions of the Handheld and Battery-Back QTERM-IV.
