Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 19)

2–2 Decoder Features
Publication 2755-833
Dual-head scanners can operate in two modes:
•
Independent Mode
Both scanners operate independently of one another, each using a
separate trigger source (Scanner A and Scanner B).
•
Coordinated Mode
Both scanners operate in a coordinated mode, each using the
same trigger source (Scanner A).
An internal power supply provides power to both the laser scanner(s)
and the decoder. The source voltage may range from 100 to 240 volts
AC nominal (50 to 60 Hz). The power supply automatically adjusts
to the input voltage.
Figure 2.1
NEMA Type 1 Decoder (Catalog No. 2755-DD1A)
POWER
ALLEN-BRADLEY
BAR CODE DECODER
POWER
CPU ACTIVE
COMMUNICATION LASER ON A
TRIGGER ACTIVE A
VALID READ A LASER ON B
TRIGGER ACTIVE B
VALID READ B DISCRETE I/O
1 2 3 4 5 6 7 8
SCANNER A Port
SCANNER B Port
(DD Versions Only) AUX Port
RS-232 HOST Port
RS-232/422/485
Optional LCD Display
LED Indicators
IEC 320 Power Connector
and ON/OFF Switch
Holes for Conduit or Optional Output Module Connectors
(shown installed on left and plugged on right).
Power Supply