107
12 Interface
107
Interface
Chapter
12
12-2.SI/F (RS-485 or SI/Specified at the time of order: SIF)
This is a two-wire serial interface for connecting printers, external display units and so on made by
UNIPULSE.
■Connection of SI/F
Up to three external devices can be connected with no polarity. Use two-core parallel cables, captire
cables (electric wires with thick coating for construction) and so on for wires. When two-core
parallel cables and captire cables are used, transmission distance is approx. 30m. When two-core
shield twisted pair wires are used, transmission distance is approx. 300m. Do not parallel AC lines
and high-pressure lines. This causes malfunction.
■Regarding indicated values transmitted by SI/F
GROSS area Values linked with indicated values are output.
NET area Current values (sensor input values) that are not linked with indicated values
are output (excluding analog peak holds *).
* Values linked with indicated values are displayed when analog peak hold
(peak hold selection = 1: analog, hold mode = 1: peak hold) is applied.
* Select GROSS on the connecting device to display values linked with indicated values.
* Select NET on the connecting device to display current values (sensor input values) that are not
linked with the indicated values.
SI/F
B9
B8
← Inside Outside →
F325
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