Siemens SIMATIC S7-200 - A.12 Specifications for the EM 277 PROFIBUS-DP Module

S7-200 Specifications
A-50
S7-200 Programmable Controller System Manual
A5E00066097-02
A.12 Specifications for the EM 277 PROFIBUS-DP Module
Table A-16 Specifications for the EM 277 PROFIBUS-DP Module
Description
Order Number
EM 277 PROFIBUS-DP
6ES7 277-0AA20-0XA0
Physical Size
Dimensions (W x H x D)
Weight
Power loss (dissipation)
71 mm x 80 mm x 62 mm
175 g
2.5 W
Communication Features
Number of Ports 1 port
Electrical interface RS-485
Isolation (external signal to PLC logic) 500 VAC (Galvanic)
PROFIBUS-DP/MPI baud rates (set automatically)
Protocols
9.6, 19.2, 45.45, 93.75, 187.5, and 500K baud; 1, 1.5, 3, 6, and12M baud
PROFIBUS-DP slave and MPI slave
Cable Length
Up to 93.75K baud
187.5K baud
500K baud
1 to 1.5M baud
3 to 12M baud
1200 m
1000 m
400 m
200 m
100 m
Network Capabilities
Station address settings
Maximum stations per segment
Maximum stations per network
0 - 99 (set by rotary switches)
32
126, up to 99 EM277 stations
MPI Connections 6 total, 2 reserved (1 for PG and 1 for OP)
Power Consumption
+5 VDC (from I/O bus)
150 mA
24 VDC Input Power Requirements
Voltage range
Maximum current
Module only with port active
Add 90 mA of 5V port load
Add 120 mA of 24V port load
20.4 to 28.8 VDC (Class 2 or sensor power from PLC)
30 mA
60 mA
180 mA
Ripple noise (<10 MHz)
1
Isolated (input power to module logic)
<1 V peak to peak (maximum)
500 VAC for 1 minute
5 VDC Power on Communication Port
Maximum current per port
Transformer isolation from module
logic and from 24 VDC input power
90 mA
500 VAC for 1 minute
24 VDC Power on Communication Port
Voltage range
Maximum current per port
Current limit
Isolated
20.4 to 28.8 VDC
120 mA
0.7 to 2.4 A
Not isolated, same circuit as input 24 VDC
1
No power is supplied to module logic by the 24 VDC supply. 24 VDC supplies power for the communication port.