simatic s7-300 - megaelektrik.net

SIMATIC S7-400
Connection methods
Fully modular connection
■ Benefits
5
• Simple plug connections for front connector module, cable
and terminal block
• Fast, low-cost wiring
• Power supply for digital and analog modules can be
connected to the front connector module or terminal block
• Reduction in wiring errors, clear control cabinet wiring
• Byte-oriented signal distribution with digital modules
• Each component can be replaced individually
• Any cable length can be configured without waste
■ Technical specifications
Technical specifications for front connector module
Rated operating voltage
24 V DC
Max. permitted operating voltage 60 V DC
Max. permitted continuous current
• per connector pin
1 A
Max. permitted summation current 4 A/byte (voltage infeed)
Permissible ambient air temperature 0 °C to + 60 °C
Test voltage
0.5 kV, 50 Hz, 60 s
Air and creepage distances IEC 664 (1980), IEC 664 A (1981),
in accordance with
DIN VDE 0110 (01.89),
overvoltage class II,
pollution degree 2
Terminal blocks for 1-wire connection and 3-wire initiators
Max. operating voltage
60 V DC
Continuous current per signal 1 A
Max. summation current
4 A/byte
(voltage input)
Operating temperature 0 °C to + 60 °C
Mounting position
Any
Air and creepage distances IEC Report 664, IEC 664 A,
IEC 1131 T2,
CSA C22.2 No 142 UL 508,
VDE 0160 (12.90),
overvoltage category II,
pollution severity 3
Dimensions (W x H x D) in mm
• 1-wire connection
Approx. 51 x 41 x 55
6ES7924-0AA00-_A_0
• For 3-wire initiators
Approx. 60 x 41 x 70
6ES7924-0CA00-_A_0
Terminal blocks with relay 8S
Field circuit side
Coil operating voltage
24 V DC
Input connections
None
Contact side
Number of relay outputs
8 (NO contacts)
Contact design
Single contact, 1 NO
Switching capacity (resistive load) Max. 2 A/250 V AC,
max. 2 A/30 V DC
max. 0.2 A/60 V DC
Recommended minimum load ≥
100 mA
Switching frequency
6 cycles/minute
Service life
• Mechanical
10 x 10 6 switching operations
• Electrical
600 x 10 3 switching operations at
230 V AC/2 A/ power factor = 1
Operating temperature 0 °C to +60 °C
Mounting position
Horizontal, ventilation slots
upwards and downwards.
To permit heat dissipation, a
space of at least 30 mm must be
left above and below the relay terminal
block
Air and creepage distances IEC 1131-2 (1992), EN 50 178
(4/98) overvoltage category III,
pollution severity 2 between trigger
circuit and relay contacts:
5.5 mm between contact groups
K0-K3 and K4-K7: 5.5 mm within
a contact group: 3.2 mm
UL and CSA available soon
Terminal blocks can be removed for
independent wiring
• For 24 V power supply for digital 4-pole terminal block
modules
• For relay outputs
Two 8-pole terminal blocks
Dimensions (W x H x D) in mm Approx. 60 x 68 x 78
6ES7924-0CD00-_A_0
5/90 Siemens ST 70 · 2005