Standard (based on the EIA/TIA-561Standard). For daisy chain
connection between racks, use an 8 or 10 position modular cable wired
straight through.
Note
1
: DTR and RTS outputs are always “high” (+8V).
Note
2
: 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 1000CC.
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 1000CCs. Using this type of
topology, one terminal can control several racks in the same location.
To wire up a local Model 1000CC 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 1000CC in
the chain.
2) Using a straight through modular cable, connect Port B1 of
the first Model 1000CC in the chain to port A1 of the second Model
1000CC in the chain. Follow the same procedure from the second
to the third Model 1000CC (and so on) if there are additional units in
the chain.
4.4.2 REMOTE DAISY CHAIN TOPOLOGY
In some applications it may be desirable to control a local rack and
a remote rack using the same local RS-232 terminal. This can be
accomplished using two of Patton’s RS-232 short range modem cards
in addition to the Model 1000CCs.
(continued)
4.2 INSTALLING THE MODEL 1000CC INTO THE CHASSIS
The Model 1000CC 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. The following steps demonstrate
the installation of the Model 1000CC 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 metal screws provided.
3.
Slide the front card into the front of the chassis. It should meet the
rear card when it's 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.
Note: Since the Model 1000R16P chassis allows “hot swapping”
of cards, it is not necessary to power down the rack when you
install or remove a Model 1000CC.
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 a the serial port of an RS-232 terminal (DTE).
This port is pinned according 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” (+8V).
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.
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 1000CC. Like port A1,
this port is pinned according Patton's Modified Modular Interface
(continued)
8
7
Figure 4. Local daisy chain.
