Technical data

A-B SuperBridge Technical Reference
2
upgraded. See Model Specific Information (page 23). The system response time will improve with
decreasing number of MCs connected. If very fast response times are required, more than one
SB can be installed on a DH+ or DH485 network.
Hardware Requirements
If a PLC-5 is to be used, SB can run on an Allen-Bradley 1771-DXS2 Information Processor
using a PC Flash EPROM card. If SB is to operate on the DH+ network, the 1771-DXS2 must be
connected to a 1771-DXKT adapter, see figure 1 (a). The adapter includes an 1784-KT/B DH+
interface and a 1784-CP8 adapter for the DH+ cable. This hardware and software package can
be supplied, configured and ready to go, from Merrick. To utilize the DH485 network, an Allen-
Bradley 1747-PIC module must be purchased. This can also be supplied by Merrick.
SB also runs on the Allen-Bradley 1771-EIP, using two PC cards: a Flash EPROM card and a
PCMK/B DH+/DH485 adapter. Also this hardware and software package can be supplied from
Merrick. This configuration has the advantage of taking up only one slot in the PLC-5.
A general version is also available, which will run on a personal computer, at least 386/25, with 2
Mbytes of RAM, 5 Mbytes of Hard Disk space and two available serial ports. This is shown in
figure 1 (d). One serial port must either be a RS-422 port, or an adapter must be used to convert
RS-232C signal levels to RS-422. To operate on the DH+ network, the PC has to be equipped
with an Allen-Bradley 1784-KT/B or 1771 KTX adapter, serving as an interface between the PC
ISA bus and DH+, and an Allen-Bradley 1784-CP8/A adapter, connecting the DH+ cable to the
1784-KT/B. This configuration is demonstrated in figure 1 (c).The DH+ equipped computer only
requires one serial port, COM1 or COM2. To operate on the DH485 network, a 1747-PIC module
must be purchased, see figure 1 (b).
Some common arrangements can be seen below. Please note that these are not the only
possible combinations.
P
L
C
5
D
X
S
2
K
T
PLC-5 chassis
M
C
M
C
M
C
M
C
RS-422
DH+
IBM compatible
w/ KT Card
MMI Package
(optional)
IBM compatible
PIC
SLC500
DH485
M
C
M
C
M
C
M
C
RS-422
PLC
(a) (b)
IBM compatible
PLC-5
or
SLC5/04
DH+
M
C
M
C
M
C
M
C
RS-422
w/ KT Card
PLC
IBM compatible
PLC-5
or
SLC500
DF1
M
C
M
C
M
C
M
C
RS-422
PLC
(c) (d)