3-4
Chapter 3 Starting and Stopping this Device
Table 3-1. Setting Range for Output Limits
Lower Limit
Current
Upper Limit
Current
B/O DOWN B/O UP
Electricity
Specification
3.6mA 21.6mA 3.2mA or less 21.6mA or greater
Note:
Setting range for variable saturation point of output.
12mA ≤ Upper output limit ≤ 21.6mA
3.6mA ≤ Lower output limit <12mA
• Constant current output
In constant current mode, output is held constant between 4 and 20 mA. This can be used for
loop tests and the like.
• Write Protection
This is a function for protecting the device's settings. When this function is enabled, the device's
settings cannot be changed. There are two types of write protection: hardware-based protection
and software-based protection.
[Hardware Write Protection]
By sliding a switch (S1) on the electronics module, this hardware write protection can be
switched ON and OFF. (“OFF” does not appear on the board.) See Figure 3-3.
Figure 3-2. Burnout Setting Switches
Note:
For information on the limits, see Table 3-1. If the output current is less than the limit, HART
communication may not be available.
Figure 3-3. Hardware Write Protection Setting Switch
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