Complementary
Analogue i/o number
500 inputs, 500 outputs - distributed - per network Modbus Plus
Unlimited (31 drops of 28 slots max) - ethernet remote I/O
1984 inputs,1984 outputs - remote
0 - local - forbidden in Hot Standby application
Clock frequency
266 MHz
Application structure
1 periodic fast task - forbidden in Hot Standby application
128 I/O interrupt tasks - forbidden in Hot Standby application
128 interrupt tasks - forbidden in Hot Standby application
32 timer interrupt tasks - forbidden in Hot Standby application
4 auxiliary tasks - forbidden in Hot Standby application
1 cyclic/periodic master task -
Product certifications
CE
UL
Misc (Marine)
CSA
GOST
Bus current requirement
2500 mA
Product or component type
Unity processor
application specific I/O
High-speed interrupt inputs
Serial link
Accurate time stamping
Counter
Discrete i/o number
31744 inputs, 31744 outputs - remote
8000 inputs, 8000 outputs - distributed - per network Modbus Plus
Unlimited (31 drops of 28 slots max) - ethernet remote I/O
0 - local - forbidden in Hot Standby application
maximum number of connections
1 USB
2 AS-Interface - distributed
4 AS-Interface - remote
6 Ethernet TCP/IP - local
6 Modbus Plus - local
6 Profibus DP - local
1 Modbus (RS232/485 Modbus/ASCII)
Number of slots
2
10
16
4
6
Local signalling
1 LED (green) for Ethernet activity (COM)
1 LED (red) for Ethernet collision
Memory description
Expandable 7168 kB - program with PCMCIA card
Expandable 8 MB - file storage with PCMCIA card
Internal RAM 1024 kB - 512 kB for data
number of instructions per ms
10.28 Kinst/ms 100 % Boolean
10.07 Kinst/ms 65 % Boolean and 35 % numerical
Mode of transmission
Multi mode
Communication service
Ethernet router
Number of distributed i/o station
63 station(s) - 1 rack(s) - 3 Modbus Plus network(s)
Integrated connection type
1 Modbus Plus with
1 Modbus with
1 USB with
1 optic fibre with Hot Standby
Number of optional modules
6 (Ethernet, Modbus, Modbus Plus, Profibus DP, Sy/Max)
Number of racks
2 - local rack(s)
Number of remote i/o station
31 - 2 rack(s) per S908 remote I/O
31 - 2 rack(s) per ethernet Quantum remote I/O
16 - 2 rack(s) per ethernet X80 remote I/O
electrical connection
1 female connector, connector type: SUB-D 9 for connecting to the Modbus Plus network
1 connector, connector type: RJ45 for connecting Modbus bus
1 connector, connector type: MT-RJ (multimode fiber optic) for interconnecting primary and secondary PLCs up to 4 km
System overhead
0.2 ms for fast task
1 ms for master task
checks
Process control
Hot standby