Figure; Wj-8718A/Mfp (Microprocessor Front Panel); Daisy Chain Configuration; Rs-232/C Connector Pin Assignments - Watkins-Johnson Company WJ-8718A/MFP Instruction Supplement

FIGURE 2-2
TABLE 2-5
REMOTE
CONTROL UNIT
WJ-8718A/MFP
REMOTE
INPUT ...
} - - - !
MONITOR
OUTPUT
I '
4
~RS-232-C
~ ,BUS
\1
~
JI
....
PI
REMOTE
INPUT
MONITOR
OUTPUT
-
f-
Jl
....
....
PI
REMOTE
INPUT
Figure 2-2. Daisy Chain Configuration
Table 2-5 lists the RS-232/C connection pin numbers with the respective inter-
change signals and functions. The connections between receivers will be pin-for-pin compatible
if each receiver is configured as a slave as shown in Figure 2-3. If one receiver is configured as
a master and the remainder are slaves, it is necessary to use reverse cable (modem bypass) with
pin connections to the slave units as shown in Figure 2-4.
Table 2-5. RS-232/C Connector Pin Assignments
Pin Number Signal Description
1
P~GND Protective Ground
2 TxD Transmitted Data
3
RxD Received Data
4
RTS Request to Send
5
CTS Clear to Send
6
DSR Data Set Ready
7
S-GND Signal Ground
20 DTR Data Terminal Ready
2-14