Switching the Power Supply On and Off
The power switch is located on the front panel. When plugged in
and switched on, a red front panel LED will glow. Since the Model
1000R16P is a "hot swappable" rack,
it is not necessary for any cards
to be installed before switching on the power supply. The power supply
may be switched off at any time without harming the installed cards.
4.2 INSTALLING THE MODEL 222NRC INTO THE CHASSIS
The Model 222NRC is comprised of a front Functions card and a
rear Interface card. The two cards connect in the rack chassis via
mating 50 pin card edge connectors. Use the following steps as a
guideline for installing each Model 222NRC into the Model 1000R16P
rack chassis:
1.
Slide the rear Interface card into the back of the chassis along the
metal rails.
2.
Secure the rear card using the metal screws provided.
3.
Slide the Function 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 spring loaded 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 222NRC.
4.3 RS-232 CONNECTION
The RS-232 ports are always the
lower ports on the interface card.
The 10-pin RJ-45s are connected according Patton's Modified Modular
Interface Standard (based on the EIA/TIA-561Standard). For specific
interface pin-outs, please refer to the diagrams in Appendix D.
(continued)
9
The Model 222NRC is wired as a DCE (Data Communications
Equipment). Therefore, it wants to connect to a DTE (Data Termination
Equipment). If your RS-232 output device is a DTE, you may need to
use a special cable (such as a DB-25 to modular cable). If your
RS-232 output device is a DCE, you will require a null modem
connection. Call Patton Technical Support at (301) 975-1007 for
specific installation instructions.
4.4 TWISTED PAIR CONNECTION
The Model 222NRC operates full duplex over two twisted pair.
In
all applications, the twisted pair wire must be 26 AWG or thicker,
unconditioned, dry, metallic wire. Both shielded and unshielded wire
are satisfactory. Note: The Model 222NRC can only be installed on
private twisted pair cable. Dial-up analog circuits, such as those used
with a standard Hayes-type modem, are
not acceptable. For further
information about acceptable wire grades, please refer to the table in
Appendix B.
4.4.1 POINT-TO-POINT TWISTED PAIR CONNECTION
The 6-position RJ-11 and 8-position RJ-45 jack options for the
Model 222NRC–always the
upper jack on the rear interface card–are
prewired for a standard TELCO wiring environment (See Appendix D
for pin number orientations). Connection of a 4-wire twisted pair circuit
between two or more Model 222NRCs requires a
crossover cable as
shown in the following charts.
RJ-11 Cable
SIGNAL
PIN#
PIN#
SIGNAL
GND
†
1-----------------------6
GND
†
RCV-
2-----------------------4
XMT-
XMT+
3-----------------------5
RCV+
XMT-
4-----------------------2
RCV-
RCV+
5-----------------------3
XMT+
GND
†
6-----------------------1
GND
†
(continued)
10
Notice!
Any terminal cable connected to the Model
222NRC must be shielded cable, and the outer shield must
be 360 degree bonded–at both ends–to a metal or
metalized backshell.
