Characteristics of the digital inputs/outputs
● The digital input/output states are always indicated via the LEDs DC16 - DC23 on DA501 or
DA502.
● All 16 inputs/outputs have the same potential ZP as all other inputs/outputs. The electrical
isolation included in the existing devices is no longer available.
● Diagnosis: Stored errors are indicated via an LED and can be accessed by the CPU (see
AC500 documentation).
● The inputs/outputs can be configured as input and as output. The outputs can also be read
back.
● Input delay (0->1 or 1->0): Typically 0.1 ms, configurable from 0.1 ms to 32 ms.
● The total current consumption of all 16 DC channels must not exceed 4 A.
● The total current consumption of all 16 DO and 16 DC channels must not exceed 12 A.
The following shows a diagram of the circuitry of a digital input/output with varistors for demag-
netization when switching off inductive loads:
Fig. 25: Circuit arrangement
1
Digital input/output
2
For demagnetization when switching off inductive loads
Data
Value
Input signal voltage
24 V DC
0 signal
-3 V ... +5 V
Undefined signal state
> +5 V ... < +15 V
1 signal
+15 V ... +30 V
The technical input data contained in the existing documentation are no longer
valid.
The varistor protection circuit has changed. The varistors for demagnetization are no longer
located between UP and the respective channel, but rather between ZP and the respective
channel. It is no longer possible to connect the voltage supply UP to connector X5 and thus use
the input voltage range from -30 V to 30 V. At the inputs, only voltages from -3 V to +30 V may
be applied. UP must always be connected to all connectors (X7, X8, X9).
Connection of the 8 configurable analog inputs
Table 20: Connector (X4)
Connector / Terminal
Pin
Assignment / Signal
X4 / AG.1
28
AGND1
X4 / 3.0
29
DA502 / AI0+
AC31 Adapters
Replacement devices: CPU > Replacement device 07KT9x-AD
2018/09/24
3ADR010122, 8, en_US
32
