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8-4. Jumper Setting
The serial interface is set to the RS-232C mode upon shipment from the factory.
When using in the 20ma current loop mode, it is necessary to set the jumpers.
The jumpers built into the Control Board allow for setting of functions shown in
the table. However, the Bottom Cover must be removed to perform this setting.
For setting the Jumper, disconnect the power source beforehand.
8-4-1. Removal of the Bottom Cover
8-4-2. Setting of Jumper
Jumper
Setting
No.
OPeN
J3
SHORt
a-C
J7
B-C
Figure 8-4. Removal of the Bottom Cover
RS-232C
Current loop
Selection of Current loop Output
(between ttY-tXD and ttY-
tXDR) Signal Polarity (inversion
possible) Consult StaR MICRON-
ICS for details.
Function
– 28 –
Factory
Setting
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