Beehive International B150 Series Operator's Manual page 8

Terminal Sid•
Customer Side
Termin•I Side
Customer Sid•
Pin Sign11I
Pin
Sign•I
;
18
Source+
:J
0
17
Transmit
....
+o Customer supplied
::> 17 Transmit
...
..J
24 Transmit
~
-o
Customer equip.
0
u
+o
24 Transmit
>4
-
0
20 ma Loop Output
19 Source 20 ma Loop Input
..J
..
u
..:
23 Receiver
4
-o Customer equip.
d
+o
..:
23 Receive
)It-
+ o Customer supplied
25 Receiver
....
w/20 ma Out
..J
24 Receive
-o
20 ma for Loop Input
Full Duplex Current Loop 20 ma sources
u
~
supplied by each transmitter
Both sources supplied by customer
Figure 2-2 Current Loop Cabling
Table 2·1 1/0 End Auxiliary Port Pin Assignments
PIN SIGNAL RS- PIN SIGNAL
2~c
ASSIGNMENTS
NO. DESCRIPTION
232C
ASSIGNMENTS
NO. DESCRIPTION
1/0 Port Pin Assignments 16 XB Terminal
-
XS TTL level transmit clock
Data Clock is provided to clock external
modem or interface units.
1 Frame Ground AA This conductor. where used,
Strap on Board location
is electrically bonded to the
XO 11·7, see Table 2·2
machine frame.
17
Current Loop
CL Transmit data from the
Transmit Data
terminal via CL.
2
Transmitted Data
BA
This circuit transfers data
from the terminal to the data
18 Current Loop CL Provides the 20 mA
set for transmission to the
20 mA Constant
power source to
external device. The unit
Source-Minimal CL.
holds circuit BA in the marked
19
Current Loop
GND Provides common
condition during any time in-
terval between characters or
Source Ground
ground for CL circuitry.
words or when no signals are
20 Data Terminal
CD
Terminal ready is high
to be transmitted.
Ready whenever power is on.
3 Received Data
BB The circuit transfers data
from the data set to the ter-
23
Receive Data Ground
CL Provides ground for CL
monal. Signals on this circuit
Receive circuit.
are generated by the data set
24
Transmit Data
in response to data signals re·
CL Provides ground for CL
ceived from the external de-
Ground
Transmit circuit.
vice. The data set holds this
line in the marking condition
25 Receive Data CL
Receives data from
when the line is idle. ex tern al device via
CL.
4
Request to Send CA Signals on this circuit are
generated by the terminal to
Auxiliary Port Pin Assignments
condition the local data set
to transmit. The ON condi-
tion is maintained whenever
1 Frame Ground This conductor. where used, is
the terminal has information
electrically grounded to the
ready for transmission or is
being transmitted. The unit
machine frame.
transmits data on circuit BA
(Transmitted Data) only when 2
AUX Receive Data This circuit transfers data from the
the ON condition is maintained
data set to the terminal. Signals
on circuits CA, CB, and CO.
on this circuit are generated by the
Request to Send is determined
data set in response to data signals
internally.
received from the external device.
5 Clear to Send CB Signals on this circuit are
generated by the data set
3 AUX Transmit Data This circuit transfers data from the
to indicate that it is pre- terminal to the data set for trans·
pared to receive data. The
mission to the external device.
ON condition on circuit CA
(Request to Send) is replayed
4 AUX Request to Send Signals on this circuit are gene-
as long as may be reauired
rated by the data set to indicate
to establish a connection to
an external device. When cir
that it is prepared to transmit
cuit CA is turned off, circuit
data.
CB is al so turned off.
5
Clear
Signals on this circuit are gene-
7 Signal Ground AB This conductor establishes
rated by the terminal to condition
the common ground refer
the local data set to transmit.
ence for all interface lines.
8 Carrier Detect CF An input signal (High) will
li&B
Data Set Ready
When the terminal is ON, the
enable the unit to receive.
line remains high.
15 X16 Terminal
TTL level
clock
provides a
7
Signal Ground
This conductor establishes the
Data Clock B150/B152 to slave terminal
common ground reference for
clock rate up to 19,200 baud.
all interface lines.
Input clock must be X 16 the
baud rate desired and baud
20 AUX Ready/Busy Receives a signal from an outside
rate switch must be set to
#15 setting.
Line
source indicating a busy or ready
mode for a transmission-controlled
delay to an outside source.
2-3