Symbol QRG 7875 Manual de usuario
7875 Scanner/Scale
7875 Scanner / Scale
1999 SYMBOL TECHNOLOGIES, INC. All rights reserved.
Symbol reserves the right to make changes to any product to improve reliability,
function, or design.
Symbol does not assume any product liability arising out of, or in connection with, the
application or use of any product, circuit, or application described herein.
No license is granted, either expressly or by implication, estoppel, or otherwise under
any patent right or patent, covering or relating to any combination, system, apparatus,
machine, material, method, or process in which Symbol products might be used. An
implied license only exists for equipment, circuits, and subsystems contained in Symbol
products.
Symbol is a registered trademark of Symbol Technologies, Inc. Other product names
mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.
Symbol Technologies, Inc.
One Symbol Plaza
Holtsville, N.Y. 11742-1300
http://www.symbol.com
1
Quick Reference
Installation Steps
When installing the 7875 Scanner/Scale, follow the installation
steps below. Skip step 4 if the unit does not have a scale.
1. Verify Checkstand Preparation, see page 1
- Checkstand Cutout
- Display Clearance
- Service Clearance
-ItemDiverter
- Ventilation Requirements
- Electrical Wiring
- Cable Hole Requirements.
2. Connect the Cables, see page 7
- Power Supply
- Remote Display
- Interface Cables
- RS-232 Peripheral Cable.
3. Install 7875 in Checkstand, see page 10
- Set Communications Protocol Switch
- Put the 7875 in Checkstand Cutout
- Align the 7875 to the Checkstand.
4. Calibrate the Scale, see page 13
- Access Calibration Switch
-ExercisetheScale
- Perform Calibration
- Validate the Calibration
- Secure Calibration Switch.
5. Check the Scanner Operation, see page 20
- Modify Program Parameters
- Scan Valid Bar Code Tags.
2
7875 Scanner / Scale
Verify Checkstand Preparation
Checkstand Cutout 7875-1000/2000
ABCDE
7875-1000
Scanner
29.51 cm 50.95 cm 3.49 cm 0.95 cm 43.97 cm
11 5/8 in. 20 1/16 in. 1 3/8 in. 3/8 in. 17 5/16 in.
7875-2000
Scanner/Scale
30.63 cm 50.95 cm 3.49 cm 1.27 cm 43.97 cm
12 1/16 in. 20 1/16 in. 1 3/8 in. 1/2 in. 17 5/16 in.
FGH I
7875-1000
Scanner
3.49 cm 13.0 cm 18.10 cm 18.42 cm
1 3/8 in. 5 1/8 in. 7 1/8 in. 7 1/4 in.
7875-2000
Scanner/Scale
3.49 cm 13.0 cm 17.78 cm 18.42 cm
1 3/8 in. 5 1/8 in. 7 in. 7 1/4 in.
No electronics under 7875
*F
G
F
A
CC
B
DD
E
H
IA
B
E
C
C
D
* Recommended shelf to catch the 7875 if
dropped during installation, although 7875
must not be supported by this shelf.
3
Quick Reference
Note: Dimension A for a 7875-2000 includes a spacer along
the side of the unit so that it fits an existing 7870-2000
cutout.
Checkstand Cutout – 7875-3000
Note: The 7875-3000 must sit on a shelf below the checkstand
surface. The shelf should be open at the front and back.
ABCD
29.51 cm 40.96 cm 3.49 cm 0.95 cm
11 5/8 in. 16 1/8 in. 1 3/8 in. 3/8 in.
EFGH
37.34 cm 12.54 cm 18.10 cm 18.42 cm
14 3/4 in. 4 15/16 in. 7 1/8 in. 7 1/4 in.
F
A
C
B
D
E
G
H
A
B
C
D
No electronics under NCR 7875
4
7875 Scanner / Scale
Display Clearance
Service Clearance
A8.0 in. (20.3 cm) minimum if checkstand structure is not removable
for servicing. 1.0 in. (2.5 cm) minimum if checkstand structure is re-
movable for servicing.
B14.0 in. (35.6 cm) minimum if checkstand structure is not removable
for servicing. 7.0 in. (17.8 cm) minimum if checkstand structure is re-
movable for servicing.
C5.1in. (13.0 cm) minimum clearance to closest checkstand panel. The
7875 must not be supported by this panel.
30
50
60
60
This area must be clear
for viewing optional
integrated display.
B
C
A
A
Mounting surface for keyboard mus
t
be removable for servicing and
vertical window replacement.
All Installations Installations Without Integrated Display
5
Quick Reference
Item Diverter
Ventilation Requirements
The 7875 Scanner/Scale is designed to operate without an exhaust
fan in the checkstand; however, there must be adequate convection
airflow. The ambient temperature inside the checkstand cannot be
higher than 104° F (40° C). Also, the ambient temperature inside
the checkstand cannot be higher than 12.6° F (7° C) above the
ambient temperature outside the checkstand. For example, if the
ambient temperature outside the checkstand is 76° F (24.4° C), the
ambient temperature inside the checkstand cannot be greater than
88.6° F (31.4° C). If the checkstand contains other heat producing
equipment, you may need to use forced air to keep the temperature
within the specified range. However, air coming into or leaving the
checkstand MUST NOT enter or exit past the 7875 Scanner/Scale.
7.25 in. (18.4 cm)
Item Diverter
(Must be removable to service
Scanner/Scale in checkstand)
6
7875 Scanner / Scale
Electrical Wiring to the Checkstand
Installation Type Input Voltage L1, L2 Circuit Breakers
U.S., Canada,
Japan
100 VAC to
120 VAC
100 VAC to
120 VAC
Standard single-pole;
value determined by
type of device branch
and by electrical code.
International 220 VAC to
240 VAC
220 VAC to
240 VAC
European 220 VAC 220 VAC European double-pole.
Input Voltage
Main Service
Panel
Neutral and
Ground Bus
L3
Conduit
Circuit A: Checkstand
Belt
Motor
Belt Control
Lighting
Misc. equip.
Isolated/Insulated
Ground Bus
Distribution Panel
Neutral
Bus
Circuit B: Terminal
Circuit C: Scanner/Scale
Receptacle should be easily
assessible and near the
Scanner/Scale.
Isolated Ground Receptacles
Checkstand
Frame
Note: The electrical wiring must meet all
electrical codes, laws and regulations.
Feeder wiring and insulated ground from
main service panel to distribution panel
to be run in metal conduit.
Circuit Breakers
Symbol circuits should be run in
separate metal conduits.
Note: Symbol circuits must be dedicated to
Symbol equipment or other logically
connected electronic equipment
(modems, DAA, bridges, etc.)
L1
L2
GN
7
Quick Reference
Note: The 7875 outlet in the checkstand must be connected to
a circuit breaker switch. This switch must be located
close to the operator and is used as the On/Off switch
for the 7875.
Hole Requirements for Cables
To run the various cables through the checkstand, you may need to
drill holes in some of the panels. The holes must be large enough for
the connector on one end of the cable to pass through. Ensure there
are no sharp edges to cut the cable. The following table gives the
minimum hole size for each of the 7875 cables.
Connect the Cables
There are several cables associated with the 7875, some required
with every installation and some optional, depending on the system.
Make sure you have all the necessary cables for your installation.
Connect the cables according to one of the following two
illustrations.
Cable Cable Length Minimum Hole Size
Power Cord – Outlet
to Power Supply
3.05 m (10 ft.) 3.18 cm (3/4 in.)
Power Cord – Power
Supply to the 7875
1.22 m (4 ft.) 1.52 cm (1/2 in.)
Interface Cable 8.0 m (26.24 ft.)
4.0 m (12.12 ft.)
1.90 cm(3/4 in.)
1.90 cm (3/4 in.)
Remote Display Cable 8.0 m (26.24 ft.)
4.0 m (12.12 ft.)
1.90 cm (3/4 in.)
1.90 cm (3/4 in.)
8
7875 Scanner / Scale
Single Cable Installation
DC
POWER
REMOTE
DISPLAY
5A
MAX
SCANNER
Check switch settings
5V
PORT 1 PORT 2
DUAL PERIPHERAL PORTS
AC
Power
Cord
Power
Supply
DC Power
Cable
Interface Cable
Host Terminal
7875
Scanner/Scale
RS-232
Peripheral
Remote
Display
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