SC4000 REFERENCE MANUAL
5
5.7.1 External Trigger Input (Input 1)
The connections are indicated in the following diagram:
Pinout
Function
+V
Power Source - External Trigger
I1A
External Trigger A (polarity insensitive)
I1B
External Trigger B (polarity insensitive)
-V
Power Reference - External Trigger
EXTERNAL TRIGGER INPUT CONNECTIONS USING READING DEVICE POWER
CAUTION
Power is available directly to the Input Device, independently from the Power
Supply Switch inside the SC4000.
(brown)
(black)
(blue)
PH-1 Photocell (PNP)
Figure 33 – PH-1 External Trigger Using SC4000 Power
Power to
Input
Photocell Signal
Photocell
Reference
NPN Photocell
Figure 34 - NPN External Trigger Using SC4000 Power
EXTERNAL TRIGGER INPUT CONNECTIONS USING EXTERNAL POWER
Pulled down to External
Input Device Reference
Input
Signal
PNP Photocell
Figure 35 - PNP External Trigger Using External Power
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