EM 277 Siemens Profibus DP Slave 6ES7 277 0AA22 0XA0
EM 277 Siemens :
6ES7 277 0AA22 0XA0 is used to interface between a S7-22X CPU and a Profibus DP network. EM 277 Can be simultaneously operated as MPI and DP slave. MPI protocol enables simultaneous data exchange with MPI masters Allows an S7-200 CPU to be connected to a Profibus DP or MPI network as a slave. Various band rates up to 12 Mbaud. With the exception of the module address, which is set with 2 rotary switches, all other settings are in the DP master In MPI mode. Also it can be used to connect operator panels such as TD200 or TDO70 Maximum number of nodes – 31.
Supply voltage
Load voltage L+ | |
● Rated value (DC) | 24 V |
● permissible range, lower limit (DC) | 20.4 V |
● permissible range, upper limit (DC) | 28.8 V |
Input current
from backplane bus 5 V DC, max. | 150 mA |
from sensor current supply or external current supply (24 V DC), max. |
180 mA; 30 to 180 mA |
Output voltage
Rated value (DC) | |
● 5 V DC | Yes |
● 24 V DC | Yes; 20.4 to 28.8V |
Output current
For interface (5 V DC), max. | 90 mA |
For interface (24 V DC), max. | 120 mA |
● Current limitation | 0.7 to 2.4 A |
Power loss
Power loss, typ. | 2.5 W |
Hardware configuration
connectable nodes | TD 200 as of V2.0, OP, TP, PG/PC, S7-300/400, PROFIBUS DP master |
Interfaces
Number of RS 485 interfaces | 1 |
MPI | |
● Number of connections, max. | 6 |
PROFIBUS DP | |
● Node addresses | 0 to 99, adjustable |
● Number of stations per segment, max. | 32 |
● Number of stations in network, max. | 126; of which max. 99 EM 277 |
● automatic detection of transmission rate | Yes |
● Transmission rate, max. | 12 Mbit/s; 9,6 / 19,2 / 45,45 / 93,75 / 187,5 / 500 kbit/s; 1 / 1,5 / 3 / 6 / 12 Mbit/s |
● Cable length, max. | 1 200 m; 100 to 1200 m, depending on transmission speed |
Protocols
Bus protocol/transmission protocol | PROFIBUS DP (slave), MPI (slave) |
Communication functions
Number of connections | |
● usable for PG communication | |
— reserved for PG communication | 1 |
● usable for OP communication | |
— reserved for OP communication | 1 |
Interrupts/diagnostics/status information
Diagnostics indication LED | |
● Bus fault BF (red) | Yes |
● CPU error (red) | Yes |
● DX mode (red) | Yes |
● Power supply (red) | Yes |
Isolation
Isolation tested with | between external signal and control logic: 500 V AC (galvanic); 5 V DC interface: Isolation between output and module as well as 24 V DC supply voltage: 500 V AC (max. 1 min.); 24 V DC interface: Isolation no; same circuit as 24 V DC supply voltage |
Connection method
Plug-in I/O terminals | No |
Dimensions
Width | 71.2 mm |