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The PLC BASIC Module occupies one slot in the 1771 I/O chassis and runs
user-written BASIC and C programs. These programs are independent of your
PLC-5 controller and provide an easy and fast interface between a PLC-5
controller, 1771 backplane, and RS-232, -422, or -485 devices. The module can
also communicate with a remote SLC controller or remote device on the
DH-485 network through a DH-485 port.
Cat. No.
Function
Comm.
Rate
1771-DB
Provides an interface
between a PLC-5
controller, 1771
backplane, and RS-232,
-422, or -485 devices
Configurable, • 2 ports for RS-232, Place in the local I/O
depending on
-422, or -485
chassis
serial protocol • 1 port for DH-485
Connections
Design Considerations
Cable
• Data
Highway
1770-CD
• RS-232
1770-CG
or Modem
Interface
Cable
1770-CP
Power
Dissipation,
Max
4W
Backplane
Current
Load
0.75 A (with
1747-PIC)
0.65 A
The communication controller modules, 1771-KE and 1771-KF, link
intelligent RS-232-C devices to Data Highway. Both of these modules provide
a choice of two protocols on the RS-232-C link - full-duplex and half-duplex.
These modules perform the same functions, however their mounting styles
and power supply requirements are different.
Cat. No.
Function
Comm.
Rate
Connections
Design Considerations
1771-KE
Provides an interface
between RS-232-C
devices and Data
Highway link with both
full-duplex and
half-duplex protocols
• Data
Highway 57 Kbps
• RS-232-C
from 110 to
19 Kbps
Data Highway,
RS-232
Place in the local I/O
chassis. Power source is
the 1771 I/O chassis
power supply.
1771-KF
Provides an interface
between RS-232-C
devices and Data
Highway link with both
full-duplex and
half-duplex protocols
• Data
Highway 57 Kbps
• RS-232-C
from 110 to
19 Kbps
Data Highway,
RS-232
Cable
Power
Dissipation,
Max
6.3 W
• Data Highway
1770-CD
• RS-232
1770-CG or
Modem
Interface Cable
1770-CP
Includes mounting
• Data Highway 6.3 W
bracket for external
1770-CD
mounting or in a standard • RS-232
industrial enclosure
1770-CG or
(NEMA Type 12 or
Modem
similar). Power source is
Interface Cable
user-supplied (1771-P2 or
1770-CP
similar).
Backplane
Current
Load
1.2 A
1.2 A
Publication 1785-SG001B-EN-P - June 2006