CIPer
TM
MODEL 50 CONTROLLER
–
INSTALLATION AND COMMISSIONING INSTRUCTIONS
31-00233-02
50
Cable Specifications
Panel Bus I/O Modules
When checking the length of the power supply cable, the connection cables to all Panel Bus I/O Modules
must be taken into account
Table 20. Power supply cable specifications
Max. length
9 ft (2.7 m) (from transformer to final module)
Cross section
min. 0.75 mm
2
(AWG 18)
EIA 485 Cable Specifications
The following cable specification is valid for all EIA 485 buses (e.g., Panel Bus, Modbus, and BACnet MS/TP).
Table 21. EIA 485 cable specifications
Max. length
3600 feet (9.6
–
78.8 kbps) or 2400 feet
(115.2 kbps).
Cable type
twisted pair, shielded (foil or braided shields
are acceptable)
Characteristic impedance
100…130
Ω
Distributed capacitance between conductors
Less than 100 pF per meter (30 pF per foot)
Distributed capacitance between conductors and
shield
Less than 200 pF per meter (60 pF per foot)
The following cables fulfill this requirement:
•
AWG 18;
•
shielded, twisted pair cable 3322 or 3251;
•
CAT 5,6,7 cable (use only one single pair for one bus);
•
Belden 9842 or 9842NH.
Tuning Panel Bus Communication
The default polling interval for all Panel Bus points is set to "normal = 10s". Data from the field is thus
updated every 10s.
Write commands are sent without time delay.
It is recommended that you update the polling interval of those points requiring more-frequent updating
(see Figure 41)
IMPORTANT
•
For CIPer Model 50, the fastest poll rate is 200 milliseconds.
•
Do NOT set a faster poll rate, as this may overload the CPU in larger systems
