BECKHOFF PT100 - Manual (Page 10)

PT100 4-fold temperature measurement Beckhoff II/O System
Page 10 of 10 Version : 1.1 Date : 12 March 97
5. Terminal diagram
Plug connection assignment and signal description
CONNECTOR X10
Plug Pin Signal Description
X10 1 + +24V supply voltage, control logic/analog
portion
X10 2 - Ground
X10 3 Unassigned
CONNECTOR X10
Plug Pin Signal Description
X20 1 - GND for PT100 sensor
X20 2 E1 Input, PT100 sensor pick-off
X20 3 E1 Input, PT100 sensor pick-off
X20 4 I1 Constant-current source for PT100 sensor
(1mA)
X20 5 - GND for PT100 sensor
X20 6 E2 Input, PT100 sensor pick-off
X20 7 E2 Input, PT100 sensor pick-off
X20 8 I2 Constant-current source for PT100 sensor
(1mA)
X20 9 - GND for PT100 sensor
X20 10 E3 Input, PT100 sensor pick-off
X20 11 E3 Input, PT100 sensor pick-off
X20 12 I3 Constant-current source for PT100 sensor
(1mA)
X20 13 - GND for PT100 sensor
X20 14 E4 Input, PT100 sensor pick-off
X20 15 E4 Input, PT100 sensor pick-off
X20 16 I4 Constant-current source for PT100 sensor
(1mA)
Important: A bridge has to be inserted at the input for all of the unused channels. Open
inputs are capable of affecting the values of the other channels.
Example: If a PT100 sensor is not connected to channels 2 and 4, then pin 6 has to be
bridged with pin 7 and pin 14 with pin 15.