Installation and Upgrade Guide Owner's manual

Publication 1757-IN040B-EN-P - March 2002
11-20 Performance and Capacity Specifications
I/O Specifications
Table 11.N I/O Module Capacity
The following applies to the Phase 2 Fieldbus integration using the 1757-FIM with controlled support
for Phase 1 Fieldbus interface using the CN2FF.
I/O Module and Fieldbus Capacity
50 ms CEE 5 ms CEE
Maximum Number of IOMs per 1757-PLX52
(1756/1757 + 1797 FLEX Ex + 1794-FLEX I/O + CN2FFs + 3*1757-FIMs 2*SST-PFBCLX’s+
4*TC-MUX021 FTA’s + in any combination.
64 12
(local 1757/1756
I/O only)
Maximum Number of Remote I/O Chassis + 1757-FIM-Only Chassis+Remote Mixed
Chassis, 1794/1797-ACNR15s (combined) per 1757-PLX52.
80
(local 1757/1756
I/O only)
Maximum Number of IOMs per Downlink 1756-CNB
(1756/1757 + 1797 FLEX Ex + 1794 FLEX I/O + CN2FFs + 3*1757-FIM’s + 6* SST-PFBCLX’s +
4*TC-MUX021 FTA’s + 1.5*1757-PIM’s in any combination.
64 scheduled
24
unscheduled
0
(local 1757/1756
I/O only)
Maximum number of Downlink 1756-CNB’s per Controller Chassis 4 0
(local I/O only)
Serial Interface Module: (TC-MUX021) related only
Maximum Number of Serial Interface Modules per 1757-PLX52 3 1
Maximum Number of FTA assemblies per Serial Interface Module (TC-MUX021)
•
Each FTA connected counts as 4 IOMs in the 64 Max IOM/1757-PLX52 and the 24
IOMs/1756-CNB calculation above.
22
1788-CN2FF related only:
Maximum number CN2FFs per 1757-PLX52
•
Each Linking Device counts as 1 IOM in the 64 IOM/1757-PLX52 calculation above.
8 Not Supported
Maximum number CN2FFs per Non-Redundant Server 8 Not Supported
Maximum number CN2FFs per Redundant Server (NI-FBUS Service and NI Configurator
must be run on the Backup Server only)
48 Not Supported
Maximum number CN2FFs per NI Configurator Project 1 0
Maximum Number of H1 segments per CN2FF 2 Not Supported
Maximum number of CN2FF Devices per H1 segment connected to a CN2FF. 10 Not Supported
1757-FIM Related Only
50ms CEE 5ms CEE
Maximum number 1757-FIM’s per 1757-PLX52
• Each 1757-FIM counts as 3 IOMs in the 64 IOMs/1757-PLX52 calculations above.
21 Not supported
Maximum number 1757-FIMs per Server (Redundant or Non-Redundant) 100 Not Supported
Maximum number of H1 segments per 1757-FIM 2 Not supported
Maximum number of FF Devices per H1 segments connected to a 1757-FIM.
(other constraints may be encountered before this constraint)
16 Not Supported