Siemens SIMATIC NET S7-1200 Compact Operating Instructions

3.5 Displays
Displays of the CSM 1277
Power indicator 'DIAG' (green LED)
The status of the power supply is indicated by a green LED:
Status Meaning
LED lit green Power supply is connected
LED not lit Power supply is not connected or the applied voltage is too low.
Refer to the <<Hinweis>> in Section <<4.6>>
Port status indicators 'P1' to 'P4' (green LEDs)
The status of the ports is indicated by four green LEDs. These are below the top panel. See also
<<Bild 4-4>>
Status Meaning
Port 1 through 4 LED lit Existing connection via port to Industrial Ethernet (LINK status)
Port 1 through 4 LED 󹪞ashing Port is sending / receiving via Industrial Ethernet
Ports 1 through 4 LEDs 󹪞ashing / in se‐
quence
Test phase during power on
Product characteristics
3.5 Displays
Compact Switch Module CSM 1277
Compact Operating Instructions, 06/2022, A2B00079397-02 17

Siemens SIMATIC NET S7-1200 Specifications

General

Supply voltage	24 V DC
Protection class	IP20
Product type designation	S7-1200
Transfer rate	10/100 Mbit/s
Number of ports	4
Power consumption	2.5 W
Operating temperature	0 °C to 60 °C
Mounting type	DIN rail
Switching capacity	1 Gbps