LBI-39101
13
Table 4 – Cable 19B804083P3 Color Coding
PC
RS-422
PORT
DB-25
PIN NO.
CONSOLE
RS-422
SIGNAL
WIRE
COLOR
TYPICAL
CEC/IMC
CONNECTION
IDENTIFI-
CATION *
1
cable shield
n/a
none **
2
TX-
white/blue
CRT 01 RX- DATA
14
TX+
blue
CRT 01 RX+ DATA
3
RX-
white/orange
CRT 01 TX+ DATA
16
RX+
orange
CRT 01 TX- DATA
7
ground
white/green
none **
* CEC/IMC Data Concentrator Card identification. See
customer-specific system documentation print-outs for specific
pin/terminal numbers.
** Wire not terminated at CEC/IMC punch block. Insulate and
tie back at punch block.
Cable 19B804083P3 is not compatible with
earlier plug-in RS-422 boards used with the C3
Maestro console system. These earlier plug-in
boards are manufactured by ICS and included
model numbers RS422AT-P and RS422I-P. They
can be easily identified by the presence of two
LED indicators visible on the rear plate. In
addition, the cable is also not compatible with
earlier C3 Maestro console PCs equipped with
main board RS-422 COM ports such as the Dasher
PCs manufactured by Data General.
❏
If cable 19B802083P3 is not used for RS-422
hook-ups, see Figures 4 and 6A and/or the
manufacturer's documentation for COM port
connector pin-out details. Fabricate a cable as
required and then use it to interconnect the C3
Maesto's RS-422 control data COM port to the
appropriate CEC/IMC Data Concentrator Card as
required. Shielded cabling is recommended. Per
RS-422 specifications, cable length should be
limited to 4000 feet (1219 meters) or less.
Figure 4 - Plug-In RS-422 Board DB-25 Connector
Pin-Out (B&B Electronics 3PXOCC1A Board)
Do not over-tighten the screws on the DB-style
connectors.
RS-232 Interfacing (Remote Console Hook-Ups Via
4-Wire Modems And RS-232 Interconnections)
When the C3 Maestro is installed at a remote location
from the CEC/IMC, a serial control data link must be
established via RS-232 connections and 4-wire full-duplex
9600 baud data modems. Since the C3 Maestro requires a
dedicated or continuous serial link (non-dial-up), a 4-wire
leased line (or equivalent) meeting 3002 data grade
specifications must be employed between the CEC/IMC and
the C3 Maestro in a remote console installation.
Figure 6B shows typical control data interconnections
for a remote console installation using RS-232 connections
and full-duplex 4-wire modems. At the CEC/IMC Data
Concentrator Card, RS-232 connections are made at J13,
not J12. Observe all notes listed in the figure if wiring an
installation of this type. Recommended modem settings
are:
•
•
Modem Options
DCE Rate = 9600
Originate/Answer = Originate (CEC/IMC modem)
Originate/Answer = Answer (C3 Maestro modem)
V.32 Fast Train = Enabled
Auto Retrain = Enabled
Internal/External Clock = Internal
NOTES:
1. VIEWED FROM BA CK OF COMPUTER (MA LE DB-25) OR
WIRING SIDE OF MA TING CONNECTOR (FEMALE
DB-25).
2. TX LINES MUST CONNECT TO "CRT" RX LINES A T
CEC/IMC CONCENTRATOR CARD OR PUNCH BLOCK, +
TO + AND - TO -.
RX LI NES MUST CONNECT TO "CRT" TX LI NES AT
CEC/IMC CONCENTRATOR CARD OR PUNCH BLOCK, +
TO + AND - TO -.
3. COLOR CODING INDICA TES CA BLE 19B804083P3 WIRE
COLORS.
13
12
11
10
25
9
8
7
6
5
4
3
2
1
14
24
23
22
21
15
20
19
18
17
16
RS-422 RX-
(W HITE/ORANGE)
RS-422 RX+
(ORANGE)
RS-422 TX-
(W HITE/BLUE)
RS-422 TX+
(BLUE)
SIGNAL GROUND
(W HITE/GREEN)
SHIELD
NOTE
NOTE