DIN Connector (Digital Inputs)

Input bits are arranged in groups of 4 and each group shares a common pin. This lets a group be connected to current sourcing or current sinking devices, based on the connection of the common pin in that group.

To be able to connect an input group to current sourcing devices, connect the input group's common pin to the power supply return (-). Refer to Digital Inputs Connected to Current Sourcing (PNP) Devices.

To be able to connect an input group to current sinking devices, connect the input group's common pin to the power supply source (+). Refer to Digital Inputs Connected to Current Sinking (NPN) Devices.

The digital inputs are not designed for high-voltage isolation applications. They should only be used with ground-referenced circuits.

Table: DIN Connector Digital Inputs Pinout

Pin #	Description	In/Out/Bi
1	Ground	N/A
2	+5 V ⁽¹⁾	Output
3	+5 V ⁽¹⁾	Output
4	Port 3 Digital Input 15	Input
5	Port 3 Digital Input 14	Input
6	Port 3 Digital Input 13	Input
7	Port 3 Digital Input 12	Input
8	Port 3 Digital Input Common	Output
9	Port 2 Digital Input 11	Input
10	Port 2 Digital Input 10	Input
11	Port 2 Digital Input 9	Input
12	Port 2 Digital Input 8	Input
13	Port 2 Digital Input Common	Output
14	Ground	N/A
15	Port 1 Digital Input 7	Input
16	Port 1 Digital Input 6	Input
17	Port 1 Digital Input 5	Input
18	Port 1 Digital Input 4	Input
19	Port 1 Digital Input Common	Output
20	Port 0 Digital Input 3	Input
21	Port 0 Digital Input 2	Input
22	Port 0 Digital Input 1	Input
23	Port 0 Digital Input 0	Input
24	Port 0 Digital Input Common	Output
25	Key	N/A
(1) The maximum combined current output is 500 mA.

Table: DIN Mating Connector Ratings

Specification	25-Pin Solder Cup	Backshell
Aerotech Part Number	ECK00300	ECK00656
Amphenol Part Number ⁽¹⁾	DB25S064TLF	17E-1726-2
Maximum Wire Size	20 AWG (0.5 mm²)	N/A
(1) Refer to the manufacturer website for additional information.

Table: Digital Input Specifications

Input Voltage	Approximate Input Current	Turn On Time	Turn Off Time
+5 V to +24 V	6 mA	10 µs	43 µs

Figure: Digital Input Schematic

Figure: Digital Inputs Connected to Current Sourcing (PNP) Devices

Figure: Digital Inputs Connected to Current Sinking (NPN) Devices