(0.75)
19.1
(2.2) 55.9
Swaged
Standoff
thru Hole
(0.15) 3.2
Diameter
Power Side Signal Side
Bit
Pos. Neg. Signal DC Return
Bit 0 2 3 3 2
Bit 1 4 5 5 4
Bit 2 6 7 7 6
Bit 3 8 9 9 8
4. Power-side terminals are polarized for dc applications, and non-polarized for ac applications.
Pull-up
Resistor
3.3K Typ
Power Side
Module Input/Output
Output
Barrier
Strip12345678
Signal Side
Module Input/Output
5. Power-side terminal 1 is not connected on 1781-A4T.
MOUNTING DIMENSIONS
1781-A4T
SCHEMATIC DIAGRAMS
1781-
A4T
76.2 (3.0)
88.9 (3.5)
6.4 (.25)
101.6 (4.0)
114.3 (4.5)
mm (in)
WRC4-
A4T