Unipulse F156, Operation Manual, Page: 130 / 160

9.SI/F 2-WIRE SERIAL INTERFACE
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9. SI/F 2-WIRE SERIAL INTERFACE
This 2-wire serial interface is for connecting F156 to peripheral equipment such as printers or
remote displays. No polarity is needed for this simple, low-cost installation.
A two-core parallel cable or a cabtyre cable (Wire with covering thickened for construction)
may be used for connection.
When a two-core parallel cable or a cabtyre cable is used, the transmitting distance is
approximately 30m (32.8yds). When a two-core shielded twisted pair cable is used, the
transmitting distance is approximately 300m (328yds).
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Connection
Up to 3 peripheral units can be connected in parallel.
It should not run along side AC or other high-voltage wiring. It may cause of malfunction.
Example 1
Up to 3 remote small displays can be connected. The each display can display individual content
according to the selection.
Example 2
These indicated above are examples for the connection of Remote small displays, Remote large
display and printer. Each display and printer can select the data individually.
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About the auto print command
The F156 can output the auto print command to the printer or display connected to the SI/F.
The auto print command is output when the complete signal turns ON. Therefore, if the final
and over/under comparison is set at “comparison OFF,” the auto print command is not output.
SI/F
LD514 Remote small display
(Gross display)
LD514 Remote small display
(Tare display)
LD514 Remote small display
(Net display)
SI/F
LD514 Remote small display
(Gross display)
LD557 Remote large display
(Tare display)
M252 Printer