Manual

Publication 1746-UM004B-EN-P - December 2005
1-2 Module and Development Software Overview
BASIC and BASIC-T
Modules
The modules are single-slot modules that reside in a SLC 500 fixed or
modular controller chassis. Use the module as
:
• a foreign device interface.
• an operator interface.
Figure 1.1 Module with Door Open
Hardware Features
The module provides the following hardware features.
• 24 KB of battery backed RAM for storage of user programs and
data
• Capacitive backup of RAM during battery change
• Socket for a standard 1747-M1, M2, M3, or M4 memory module
(1746-BAS module) for nonvolatile storage of user programs
• Socket for a 1771-DBMEM1 or -DBMEM2 memory module
(1746-BAS-T module) for nonvolatile storage of user programs
• Battery-backed, 24-hour clock/calendar
• Free-running clock with 5 ms resolution
• Two isolated 9-pin D-shell serial ports (PRT1 and PRT2) that
provide RS-232/423, RS-422, and RS-485 communication with
I/O devices
• One PRT2 port provides DF1 full-duplex or half-duplex slave
protocol for SCADA applications
• One RJ-45 port (DH485) that provides communication over the
DH485 network
• Multiple LED indicators for operator interface
• SLC 500 backplane interface
PR T1
5
4
3
2
1
9
8
7
6
PR T2
5
4
3
2
1
9
8
7
6
DH485
BASIC
PR T1
5
4
3
2
1
9
8
7
6
PR T2
5
4
3
2
1
9
8
7
6
DH485
BASIC-T