Westermo TD-23 Guía de usuario descargar pdf (Pagina 11)

6600-2204

RS-422/485

Electrical specification EIA RS-485

2-wire or 4-wire twisted pair

Data rate 300 bit/s – 1200 bit/s

Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits;

Σ 9-12 bits

Protocol Transparent

Retiming No

Turn around time 4.2 ms (half duplex)

Transmission range ≤ 1200 m, depending on data rate and cable type (EIA RS-485)

Settings 120 Ω termination and failsafe biasing 680 Ω

Protection Installation Fault Tolerant (up to ±60 V)

Isolation to Power / Leased Line

Connection Detachable screw terminal

Connector size 0.2 – 2.5 mm² (AWG 24 – 12)

Shielded cable Not required*

RS-232

lectrical specification EIA RS-232

Data rate 300 bit/s – 1200 bit/s

Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits;

Σ 9-12 bits

Protocol Transparent

Retiming No

Transmission range 15 m

Isolation to Power / Leased Line

Connection 9-pin D-sub female (DCE)

or Detachable screw terminal (DCE)

Connector size 0.2 – 2.5 mm² (AWG 24 – 12)

Shielded cable Not required*

Conductive housing Isolated to all other housings

* Railway installation close to the rails.

For a cable located inside 3 m boundary and connected to this port, the use of shielded cable is recommended,

this is to minimise the risk of interference. The cable shield should be properly connected (360°) to an earthing

point within 1 m from this port. This earthing point should have a low impedance connection to the conductive

enclosure of the apparatus cabinet, or similar, where the unit is built-in. This conductive enclosure should be

connected to the earthing system of an installation and may be directly connected to the protective earth.

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Westermo TD-23 Guía de usuario Pagina 11