IAI America XSEL-S - Manual (Page 28)

Chapter 1 Specifications Check
22
IA Net
XSEL-R/S
1.2 Basic Specifications List
Item Description Remarks
Communication System Half-duplex multi-drop Insulation with pulse transformers
Baud Rate 12Mbps ņ
Number of Connectable
Units
64 units at maximum
There are restrictions in the number of
units depending on the system
construction of the network.
[Refer to Chapter 3 Operation]
Occupied Memory Units 1 to 4 stations
XSEL : 1 to 4 stations to be occupied
Expansion I/O Unit : 4 stations to be
occupied
Shared Memory
Capacity
256 words 1 station (4 words) × 64 areas
Cycle Time (Note 1)
0.102msec
(when 2 units connected) to䎃
2.365msec
(when 64 units connected)
Refer to 3.1.3 Regarding Communication
Cycle Time
Cable
Dedicated Cable
(CB-RS-IAN * * *)
Shielded two-cored twisted pair cable
Total Cable Length 100m ņ
Terminal Resistance External mount 100: (1/2W) necessary on both terminals
XSEL Side MCDN1.5/3-G1-3.5P26THR Manufactured by PHOENIX CONTACT
Connector
Cable Side FMC1.5/3-ST-3.5 Manufactured by PHOENIX CONTACT
Note1 The calculation for IA Net communication cycle time is based on the last station number.
࡮
When 2 units connected(= final station No.1)
{(1+152) Ч (1 + 3) Ч 2} / 12000 = 0.102ms
࡮ When 64 units connected(= final station No.63)
{(63 + 152) Ч (63 + 3) Ч 2} / 12000 = 2.365ms