INSTALLATION
3 - 8
I-E96-217A
®
Termination Unit Installation
NOTE:
provides instructions pertaining to the physical
installation of the SPM only. For complete termination cable and TU
installation procedures, refer to Termination Unit Manual I-E93-911.
An optional TU can be installed to provide connection for a
diagnostic terminal to port 1, and an alternate connection
point for a DTE and DCE device to port 2. This TU has two
RS-232C D connectors that a termination cable connects to P3
of the SPM. Normally, a computer or modem connects to the
RS-232C connector provided at the SPM faceplate. Refer to
for more information.
WIRING CONNECTIONS AND CABLING
The SPM has two card edge connectors, P1 and P3, to provide
power to the SPM circuitry, establish communication with INFI
90 modules and cable connection to an optional TU.
Wiring
Installing the SPM in the MMU connects P1 of the module to
logic power (+5 VDC and ±15 VDC) necessary to operate its cir-
cuitry. It also connects to the module bus for communication
with other modules. P1 connection requires no additional wir-
ing or cabling.
Cable Connections
Faceplate RS-232C Cable
Connection
An RS-232C cable connects a DTE (e.g., computer) or DCE
(e.g., modem) device to the SPM faceplate connector. This cable
routes the handshaking signals and data transferred between
DTE or DCE devices and the SPM. Refer to Figure
for the
RS-232C cable wiring requirements for use with DTE or DCE
devices.
NOTE:
PROT GND - Protective ground.
DSR - Data set ready.
TX - Transmitted data.
SIG GND - Signal ground.
RX - Received data.
RLSD - Received line signal detect.
CTS - Clear to send.
DTR - Data terminal ready.
Figure 3-2. RS-232C Compatible Cable Wiring Requirements
PROT GND
TX
RX
CTS
DSR
SIG GND
RLSD
DTR
PROT GND
TX
RX
CTS
DSR
SIG GND
RLSD
DTR
PROT GND
TX
RX
CTS
DSR
SIG GND
RLSD
DTR
PROT GND
TX
RX
RTS
CTS
DSR
SIG GND
RLSD
DTR
1
2
3
5
6
7
8
20
1
2
3
4
5
6
7
8
20
1
2
3
5
6
7
8
20
1
2
3
4
5
6
7
8
20
IMSPM01
IMSPM01
DATA TERMINAL
EQUIPMENT
DATA COMMUNICATION
EQUIPMENT
TP27271A