PMAC-Lite Hardware Reference
12
E-Point
Descriptions
E17A-D: Amplifier Enable/Direction Polarity Control
E Point & Physical
Layout
Location Description
Default
E17A
F1
Jump 1-2 for high-true AENA1
Remove jumper for low-true AENA1
No jumper
installed
E17B
F1
Jump 1-2 for high-true AENA2
Remove jumper for low-true AENA2
No jumper
installed
E17C
F1
Jump 1-2 for high-true AENA3
Remove jumper for low-true AENA3
No jumper
installed
E17D
F1
Jump 1-2 for high-true AENA4
Remove jumper for low-true AENA4
No jumper
installed
Note:
Low-true enable is the fail-safe option with the default sinking ULN2803A output driver IC.
High-true enable is the fail-safe option with the alternate sourcing UN2981A.
E22 - E23: Control Panel Handwheel Enable
E-Point & Physical
Layout
Location Description
Default
E22
F2
Jump pin 1 to 2 to obtain handwheel
encoder signal from front panel at J2-
16 for CHB2 (ENC2-B).
No jumper
E23
F2
Jump pin 1 to 2 to obtain handwheel
encoder signal from front panel at J2-
22 for CHA2 (ENC2-A).
No jumper
Note:
With these jumpers ON, no encoder should be wired into ENC2 on JMACH1. Jumper E26 must
connect pins 1-2, because these are single-ended inputs. This function is unrelated to the encoder brought
in through ACC-39 on J2.
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