B&B Electronics RT3G-300_310_320_330_340-W - User Manual - Manual (Page 30)

B&B Electronics, Inc. SPECTRE User Manual
30
SPECTRE_User_Manual_2912m
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4.7.3.5 Selecting the Binary Input Current
The input threshold for detecting a logic 1 can be set at either 8uA or 20mA using a jumper
on the module board. When jumper J4 is shorted, the threshold current level is 20 mA.
When jumper J4 is not shorted, the threshold current level is
8μA. A threshold current value
of 20mA has a higher resistance to noise on the input but also dissipates more power.
Fig. 29: CNT I/O board
Jumper J4