simatic s7-300 - megaelektrik.net

SIMATIC S7-300
Connection methods
Fully modular connection
■ Benefit
• Simple plug connections fo r front connector module,
cable and terminal block
• Fast, low-cost wiring
• Power supply for digital and analog signals can be connected
to the front connector module or terminal block
• Preliminary detent position of front connector modules for
activation (only with 20-pole front connector modules)
• Reduction in wiring faults, clear control cabinet wiring
• Byte-oriented distribution of digital signals
• Each component can be replaced individually
• Any cable length can be configured without waste
4
■ Technical specifications
Technical specifications for front connector module
Rated operating voltage
24 V DC
Max. permitted operating voltage DC 60 V
Max. permitted continuous current
• per connector pin
1 A
Max. permitted summation current 4 A/byte
Permissible ambient air
0 to + 60 °C
temperature
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
Technical specifications for 16-pin and 2 x 16-pin SIMATIC S7
round-sheath ribbon cable on terminal block
Operating voltage
DC 60 V
Continuous current per signal lead 1 A
Max. aggregate current
4 A/byte
Operating temperature 0 to + 60 °C
External diameter in mm
approx. 9.5/11.5
for 16-pin/2 x 16-pin
Terminal blocks for 1-wire connection and 3-wire initiators
Max. operating voltage
DC 60 V
Continuous current per signal 1 A
Max. aggregate current
4 A/byte
(power supply)
Operating temperature 0 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 class II,
pollution degree 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
Energizing side
Operating voltage for coil
DC 24 V
Input circuit
none
Contact side
Number of relay outputs
8 (NO contact)
Contact design
Single contact, 1 NO contact
Breaking capacity
max. 2 A/250 V AC,
(resistance load)
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 make-break operations
• electrical
600 x 10 3 make-break operations
at 230 V AC/2 A/ cos φ = 1
Operating temperature 0 to +60 °C
Mounting position
horizontal, ventilation slots at the
top and bottom.
A space of at least 30 mm must
be left above and below the relay
terminal block for cooling.
Air and creepage distances IEC 1131-2 (1992), EN 50 178
(4/98) overvoltage category III,
pollution degree 2 between control
circuit and relay contact:
5.5 mm between contact groups
K0-K3 and K4-K7:
5.5 mm within a contact group :
3.2 mm UL and CSA in
preparation
Connection blocks removable for
permanent wiring
• for 24 V infeed for supply of digital 4-pin connection block
modules
• for relay outputs
two 8-pin connection blocks
Dimensions (W x H x D) in mm approx. 60 x 68 x 78
6ES7924-0CD00-_A_0
Siemens ST 70 · 2005
4/157