Ransburg DynaFlow Programmers Manual - Manual (Page 52)

Since there is no hardware or software flow control,
it is up to the receiving device at both ends of the
connection to keep up with the sending device.
It is recommended that the receiver be interrupt
driven. Polling may be used to control the trans-
mitter. The Interface Module utilizes interrupts to
control both transmit and receive on the SIO port.
SIO Baud Rate
The SIO Baud Rate is specified in SW2, positions
5 and 6 as shown below:
SIO Cable Connection
The SIO connection is made using two pair shield-
ed cable. The connections are made at the rear
of the DynaFlow backplane on connector J8.
SIO Driver Levels
The SIO port supports full duplex RS-232C or
RS-422 driver levels. The following table shows
the maximum cable lengths recommended for
each level. Whenever possible, RS-422 should
be utilized. The 19.2 Kbaud is the near the the-
oretical maximum baud rate for RS-232C and is
more susceptible to electrical noise.
Jumper E5 on the Interface Module selects either
RS-232C or RS-422 mode. Jumper E5 controls
whether 120 ohm terminating resistor is installed
for RS-422 or RS-485 operation. (Factory default
settings in bold)
SW2-5 SW2-6
OFF
OFF
ON
ON
OFF
ON
OFF
ON
19.2 Kbaud
4.8 Kbaud
9.6 Kbaud
38.4 Kbaud
SIO Baud Rate
Driver
Level
Jumper E5
RS-232C
RS-422
2-3
1-2
X
Install
Jumper E10 -
120 ohm Terminating
Resistor
Connection
J8-1
J8-2
J8-3
J8-4
J8-5
J8-6
J8-7
J8-8
RS-422 Receive (+)
RS-422 Receive (-)
RS-422 Transmit (+)
RS-422 Transmit (-)
RS-422 & RS-485 Ground
RS-232C Receive
RS-232C Transmit
RS-232C Ground
DynaFlow
Backplane
Driver
Level
Max. Shielded
Cable Length
RS-232C
RS-422
50 Ft.
4,000 Ft.
25 Ft.
4,000 Ft.
Max. Unshielded
Cable Length
SIO Hardware Settings
The DynaFlow Interface Module (77377-02) has
several DIP switch and jumper settings that estab-
lish the operating characteristics of the SIO port.
SIO Port Configuration
Data Bits Start Bits
8 1
Parity
None None
Flow
Control
Stop Bits
1
48
DynaFlow Programer's Manual - Installation
Ransburg
LN-9406-00.3