4.4 RS-232 DAISY CHAIN CONNECTION (PORT “B1”)
The 10-pin RJ-45 port labeled B1 is wired as a DTE, and is
designed to connect to port A1 of another Model 1001CC. Like port A1,
this port is pinned according Patton's Modified Modular Interface
Standard (based on the EIA/TIA-561Standard). For daisy chain
connection between racks, use an 8 or 10 position modular cable wired
straight through
.
Note1: DTR and RTS outputs are always “high” (+5V).
Note2: The DSR input must be “high” in order fo the daisy chain port
to operate. This is provided automatically when the B1 port is
connected to the A1 port of another Model 1001CC.
4.4.1 LOCAL DAISY CHAIN TOPOLOGY
Figure 4 (below), shows a typical daisy chain connection using a
remote terminal, two racks and two Model 1001CCs. Using this type of
topology, one terminal can control several racks in the same location.
To wire up a local Model 1001CC daisy chain connection, follow these
steps:
1) Using a straight through modular cable, connect the serial
port of the RS-232 terminal to Port A1 of the first Model 1001CC in
the chain.
2) Using a straight through modular cable, connect Port B1 of
the first Model 1001CC in the chain to port A1 of the second Model
1001CC in the chain. Follow the same procedure from the second
to the third Model 1001CC (and so on) if there are additional units in
the chain.
4.2 INSTALLING THE MODEL 1001CC CARDS INTO THE CHASSIS
The Model 1001CC is comprised of a front card and a rear card.
The two cards meet inside the rack chassis and plug into each other via
mating 50 pin card edge connectors. Follow the steps below to install
the cards into the chassis.
1. Slide the rear card into the back of the chassis along the metal
rails.
2. Secure the rear card using the enclosed metal screws.
3. Slide the front card into the front of the chassis. It should meet the
rear card when it is almost all the way into the chassis.
4. Push the front card
gently
into the card-edge receptacle of the rear
card. It should “click” into place.
5. Secure the front card using the thumb screws.
4.3 RS-232 TERMINAL CONNECTION (PORT “A1”)
The 10-pin RJ-45 port labeled “A1” is wired as a DCE, and is
designed to connect to port B1 of another Model 1001CC. Port A1, this
port is pinned according to Patton’s Modified Modular Interface
Standard, which is based on the EIA/TIA 561 Standard (for specific
pinouts, see Appendix C). Note: DSR, CTS and CD outputs are
always ”high” (+5V).
When making a connection between port A1 and the serial port of
an RS-232 terminal, your cable should be wired
straight through
. Note:
if your terminal device does not have a modular RJ-45 port, you will
need to construct an adapter cable according to the pinouts in
Appendix C. A pre-made DB-25 to RJ-45 adapter is also available
from Patton Electronics. This may be used in conjunction with a
straight through modular cable (also available from Patton). Refer to
Appendix B for the correct part number when ordering these items.
87
Figure 4. Local daisy chain.
