Beehive International B150 Series Operator's Manual page 10

PIN
NO.
8
15
Terminal Side
Customer Side
Pin
Signal
18 Source +
1 17 Transmit
! 24
Transmit —
——*—
Customer equip.
19
Source —
» •
—to 20 ma Loop Input
; 23 Receiver —
—=o
Customer equip.
1 25
Receiver
—io
w/20 ma Out
U
Full Duplex Current Loop 20 ma sources
supplied by each transmitter
Terminal Side
Pin Signal
3 17 Transmit
_i 24 Transmit
O
S 23
d 24
Receive
Receive
Customer Side
-Iq Customer supplied
20 ma Loop Output
JLq Customer supplied
20 ma for Loop Input
Both sources supplied by customer
Figure 2-2 Current Loop Cabling
SIGNAL
DESCRIPTION
I/O Port
Frame Ground
Transmitted Data
Received Data
Request to Send
Clear to Send
Signal Ground
Carrier Detect
X16 Terminal
Data Clock
Table 2-1 I/O End Auxiliary Port Pin Assignments
RS-
232C ASSIGNMENTS
PIN
NO.
in Assignments
16
17
18
19
20
23
24
25
AA
BA
BB
CA
CB
AB
CF
This conductor, where used,
is electrically bonded to the
machine frame.
This circuit transfers data
from the terminal to the data
set for transmission to the
external device. The unit
holds circuit BA in the marked
condition during any time in
terval between characters or
words or when no signals are
to be transmitted.
The circuit transfers data
from the data set to the ter
minal. Signals on this circuit
are generated by the data set
in response to data signals re
ceived from the external de
vice. The data set holds this
line in the marking condition
when the line is idle.
Signals on this circuit are
generated by the terminal to
condition the local data set
to transmit. The ON condi
tion is maintained whenever
the terminal has information
ready for transmission or is
being transmitted. The unit
transmits data on circuit BA
(Transmitted Data) only when
the ON condition is maintained
on circuits CA, CB, and CD.
Request to Send is determined
internally.
Signals on this circuit are
generated by the data set *
to indicate that it is pre
pared to receive data. The
ON condition on circuit CA
(Request to Send) is replayed
as long as may be required
to establish a connection to
an external device. When cir
cuit CA is turned off, circuit
CB is also turned off.
This conductor establishes
the common ground refer
ence for all interface lines.
An input signal (High) will
enable the unit to receive.
TTL level clock provides a
B150/B152 to slave terminal
clock rate up to 19,200 baud.
Input clock must be X16 the
baud rate desired and baud
rate switch must be set to
#15 setting.
t>&8
7
20
2-3
SIGNAL
DESCRIPTION
X8 Terminal
Data Clock
Current Loop
Transmit Data
Current Loop
20 mA Constant
Source—Minimal
Current Loop
Source Ground
Data Terminal
Ready
Receive Data Ground
Transmit Data
Ground
Receive Data
2^C
CL
CL
GND
CD
CL
CL
CL
ASSIGNMENTS
X8 TTL level transmit clock
is provided to clock external
modem or interface units.
Strap on Board location
XD 11-7. see Table 2-2.
Transmit data from the
terminal via CL.
Provides the 20 mA
power source to
CL.
Provides common
ground for CL circuitry.
Terminal ready is high
whenever power is on.
Provides ground for CL
Receive circuit.
Provides ground for CL
Transmit circuit.
Receives data from
external device via
CL.
Auxiliary Port Pin /Assignments
Frame Ground
AUX Receive Data *
AUX Transmit Data
AUX Request to Send
Clear
Data Set Ready
Signal Ground
AUX Ready/Busy
Line
This conductor, where used, is
electrically grounded to the
machine frame.
This circuit transfers data from the
data set to the terminal. Signals
on this circuit are generated by the
data set in response to data signals
received from the external device.
This circuit transfers data from the
terminal to the data set for trans
mission to the external device.
Signals on this circuit are gene
rated by the data set to indicate
that it is prepared to transmit
data.
Signals on this circuit are gene
rated by the terminal to condition
the local data set to transmit.
When the terminal is ON, the
line remains high.
This conductor establishes the
common ground reference for
all interface lines.
Receives a signal from an outside
source indicating a busy or ready
mode for a transmission-controlled
delay to an outside source.