Holtgreven GSE-355 I.S. - Manual (Page 45)

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Figure 27: Battery Option Installation (350 die cast)
P
IN
D
ESIGNATIONS
See Figure 28 for main board battery connections (J3).
PIN DESCRIPTION
+ Positive terminal (VDC signal input)
- Negative terminal (VDC signal input)
L Low battery indicator terminal (TTL output - +5V OK, 0V Lo Bat)
S Shutdown
NOTE: Earlier die cast model’s main board may have only 2 or 3 pins
(no “L” or “S” pins).