Siemens Welding System ST PCS 7 User Manual

ET 200iSP distributed I/O

Siemens ST PCS 7 · November 2007

11

■

• Conversion of the electrical PROFIBUS DP RS 485 transmis-

sion technology into the intrinsically-safe RS 485-iS transmis-

sion technology with a transmission rate of 1.5 Mbit/s

• Required to connect intrinsically-safe PROFIBUS DP stations, 

e.g. ET 200iSP, ET 200iS or devices from other vendors with 

Ex i DP connection

• Functionality as a safety barrier
• Additional use as a repeater in the hazardous area
• Passive bus station (no configuration necessary)
• Certified according to ATEX 100a

■

Design
• The RS 485-iS coupler is an open unit; assembly is only per-

missible in housings, cabinets or rooms for electrical equip-

ment.

• The RS 485-iS coupler is approved for use in hazardous areas 

of zone 2.

It must be fitted in a housing which at least corresponds to the 

IP54 degree of protection. A manufacturer’s declaration for 

zone 2 (according to EN 50021) is required for the housing 

and the necessary cable glands.

• The RS 485-iS coupler can be used in a horizontal or vertical 

position.

• Installation is on a SIMATIC S7-300 rail.
• Diagnostics LEDs on the front panel signal the operating sta-

tus.

• Connection to standard PROFIBUS DP via standard Sub-D 

socket (at the bottom on the RS 485-iS coupler, behind the 

right front door).

• Connection of PROFIBUS DP with RS 485-iS transmission 

technology via screw terminals (at the top of the RS 485-iS 

coupler, behind the right front door)

• The last bus station on the intrinsically-safe PROFIBUS DP 

segment (not further RS 485-iS couplers) must be terminated 

by a selectable resistance using the connector, Order No. 

6ES7 972-0DA60-0XA0.

B) Subject to export regulations: AL: N, ECCN: EAR99H

■

Order No.

Isolating transformer for connec-

tion of PROFIBUS DP segments 

with RS 485 and RS 485-iS trans-

mission technologies

For connection of IM 152 to 

PROFIBUS DP with RS 485-iS 

transmission technology

B)

S7-300 rails
Lengths:
• 160  mm

• 482  mm

• 530  mm

• 830  mm

• 2000 mm

Standard type with special design 

for fast mounting, 2-core, 

shielded, cut-to-length; max. 

delivery unit 1000 m, minimum 

ordering quantity 20 m

© Siemens AG 2007