RS485 module (isolated) FCA2002-A1
14
Pin assignments
95
Building Technologies
008837_q_en_--
Fire Safety
14.05.2012
14.3
Pin assignments
14.3.1
X2 connector
Pin
Designation
Description
4
RS485_A
Line A
3
RS485_B
Line B
2
Not connected
1
Not connected
Admissible cable cross-section: 0.2…1.5 mm²
3
4
X2
RS485_B
RS485_A
T1
Tn
2
1
*)
A
B
T1 First participant
Tn Last participant
*) Stub lines must not exceed 20 m!
Consider the polarity A, B!
Terminate the line after the last participant (Tn) with 120 !