TSX AEY 420 Connector Pins
(Original Document)
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At a Glance
The TSX AEY 420 input module consists of a 25-pin Sub-D connector.
Connector Pins
The connector pins are shown below: 
NC
Pin not connected 
+IVx
+ Pole voltage input of channel x 
+ICx
+ Pole current input of channel x 
COMx
- Pole current or voltage input of channel x 
STD
The "strap" between pins 3 and 13 detects the unplugging of the connector.
NOTE: The COM0, COM1, COM2, and COM3 pins are linked internally in the module.