Siemens SIMATIC S7-1500 Manual page 23

Digital outputs DQ0, DQ1 and DIQ2
Up to three digital outputs are available per channel. When you use the "RS422, symmetrical
/ TTL (5 V), asymmetrical" signal interface, you can use digital output DQn.0 to enable the
drive. When the "24 V, asymmetrical" signal interface is used, you connect the P/A signal to
digital output DQn.0 and the D/B signal to digital output DQn.1. In this case, you can use
digital output DIQn.2 to enable the drive.
The digital outputs of the channels are not electrically isolated from each other. The digital
outputs are electrically isolated from the backplane bus.
The digital outputs are 24 V current-sourcing switches in relation to M. DQn.0 and DQn.1
can be loaded with 0.1 A rated load current and DQn.2 can be loaded with 0.5 A rated load
current. The digital outputs are protected from overload and short-circuit.
Note
Relays and contactors can be connected direct without external circuitry.
Possible combinations of the DI and DQ functions
The possible combinations of additional DI and DQ functions are dependent on the signal
interface:
● Reference switch input (RS, Reference Switch)
● Measuring input (MI, Measuring Input)
● "Drive ready" input (DR, Drive Ready)
● Drive enable output (ED, Enable Drive)
Technology Module TM PTO 4 (6ES7553-1AA00-0AB0)
Manual, 12/2016, A5E38896703-AA
Connecting
3.1 Pin assignment
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