Siemens SIMATIC S7 - Page 688

Technical specifications
A.2 S7-200 SMART CPUs
S7-200 SMART
688 System Manual, V2.3, 07/2017, A5E03822230-AF
Technical data
CPU ST20 DC/DC/DC
CPU SR20 AC/DC/Relay
CPU CR20s AC/DC/Relay
Isolation (external signal
to PLC logic)
Ethernet: Transformer
isolated, 1500 V AC
RS485: none
Ethernet: Transformer
isolated, 1500 V AC
RS485: none
Ethernet: Not available
RS485: None
Cable type Ethernet: CAT5e shielded
RS485: PROFIBUS network
cable
Ethernet: CAT5e shielded
RS485: PROFIBUS network
cable
Ethernet: Not available
RS485: PROFIBUS network
cable
Table A- 13 Power supply
Technical data
CPU ST20 DC/DC/DC
CPU SR20 AC/DC/Relay
CPU CR20s AC/DC/Relay
Voltage range
20.4 to 28.8 V DC
85 to 264 V AC
85 to 264 V AC
Line frequency
--
47 to 63 Hz
47 to 63 Hz
Input
current
CPU only at
max. load
160 mA at 24 V DC (without
driving 300 mA sensor power)
430 mA at 24 V DC (with
driving 300 mA sensor power)
210 mA at 120 V AC (with
300 mA power sensor output)
90 mA at 120 V AC (without
300 mA power sensor output)
120 mA at 240 V AC (with
300 mA power sensor output)
60 mA at 240 V AC (without
300 mA power sensor output)
90 mA at 120 V AC
60 mA at 240 V AC
CPU with all
expansion
accessories
at max. load
720 mA at 24 V DC 290 mA at 120 V AC170 mA
at 240 V AC
--
Inrush current (max.) 11.7 A at 28.8 V DC 9.3 A at 264 V AC 16.3 A at 264 V AC
Isolation (input power to
logic)
-- 1500 V AC 1500 V AC
Ground leakage, AC line
to functional earth
-- 0.5 mA max. 0.5 mA max.
Hold up time (loss of pow-
er)
20 ms at 24 V DC 30 ms at 120 V AC 200 ms at
240 V AC
30 ms at 120 V AC
200 ms at 240 V AC
Internal fuse, not user
replaceable
3 A, 250 V slow blow 3 A, 250 V, slow blow 3 A, 250 V, slow blow
Table A- 14 Sensor power
Technical data
CPU ST20 DC/DC/DC
CPU SR20 AC/DC/Relay
CPU CR20s AC/DC/Relay
Voltage range
20.4 to 28.8 V DC
20.4 to 28.8 V DC
Not available
Output current rating
(max.)
300 mA (short circuit
protected)
300 mA (short circuit
protected)
Not available
Maximum ripple noise
(<10 MHz)
< 1 V peak to peak < 1 V peak to peak Not available
Isolation (CPU logic to
sensor power)
Not isolated Not isolated Not available