Minimum
Typical
Maximum
Transmission speed (selectable)
9,600 Baud
19,200 Baud
38,400 Baud
125 kBaud
250 kBaud
500 kBaud
Cable length for 500 kBaud and 0.25 mm²
cables
100 m
Galvanic separation
Yes
Differential output voltage at the sender
(between TxD+ and TxD–) with 50 Ω load
± 2 V
± 5 V
Differential input threshold at the receiver
(between RxD+ and RxD–)
± 0.2 V
Short-circuit current at TxD+, TxD–
–250 mA
250 mA
Maximum voltage level at TxD+, TxD–
–29 V
29 V
Maximum voltage level at RxD+, RxD–
–29 V
29 V
Terminator
115 Ω
120 Ω
125 Ω
Cable type to be connected
Twisted pairs with copper braid screen
Impedance of the cable to be connected
80 Ω
100 Ω
115 Ω
Wire cross-section of the cable to be connected
0.25 mm²
0.6 mm²
Safe SICK device communication via EFI/SDL
Cable length for 500 kBaud and 1 × 2 ×
0.22 mm² cables
50 m
Galvanic separation
Yes
Cable type to be connected
Twisted pairs with copper braid screen,
cable diameter ≤ 6.8 mm
Wire cross-section of the cable to be connected
1 × 2 × 0.22 mm²
1)
Operation only in a short-circuit protected system with max. 8 A.
2)
To meet the requirements of the relevant product standards (e.g., IEC 61496-1), the external voltage sup‐
ply for the devices must be able to bridge a brief mains failure of 20 ms. Power supply units according to
EN 60204-1 fulfill this prerequisite. Suitable power supply units are available as accessories from SICK.
3)
The absolute voltage level must not drop below the specified minimum voltage.
4)
The load currents for the input capacitors are not taken into account.
5)
With a typical supply voltage of 24 V.
6)
Ferrules are not needed.
7)
Applies to the voltage range between U
s
and 0 V.
8)
In the case of a fault (0 V cable open circuit), no more than the specified leakage current flows in the
OSSD cable. The downstream control element must detect this state as LOW. An FSPLC (fail-safe pro‐
grammable logic controller) must detect this state.
9)
If the switching sequence is low, the maximum permissible load inductance is higher.
12
TECHNICAL DATA
144
O P E R A T I N G I N S T R U C T I O N S | S3000
8009942/ZA18/2019-11-14 | SICK
Subject to change without notice
