PCI Communication
User Manual
16
2.3.3.4
Termination Setup (for PCI-1602B/1602C/1612B/1612C/1622B/1622C)
If necessary, you can set termination resistors to match the impedance. Each signal
line (Tx, Rx) has a separate resistor.
Termination is recommended for when designing an RS-422 interface. RS422 Mode
with a terminator resistor is 120
Ω
under standard conditions. However, the transmis-
sion condition is affected by the impedance of the cable length.
Figure 2.10 Impedance Selection (PCI-1600 Series)
Note!
Especially in fields with serious electric noise, setting termination resis-
tors is helpful to stabilize communications. Ensure that both sides of the
RS-485 bus have termination resistors. See Sections 5.2.2 and 5.2.3 for
further details.
Table 2.4: PCI-1600 Series Impedance Selection Jumper Position
Model
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
PCI-1602B
CN2
CN4
PCI-1602C
CN2
CN4
PCI-1612B
CN5
CN6
CN7
CN8
PCI-1612C
CN5
CN6
CN7
CN8
PCI-1622B
CN2
CN3
CN4
CN5
CN6
CN7
CN8
CN9
PCI-1622C
CN9
CN10
CN11
CN12
CN13
CN14
CN15
CN16
PCI-1602UP
CN2
CN4
Note!
Do not set termination resistors under RS232 mode.
Summary of Contents for PCI Series
Page 1: ...User Manual PCI COMM Series User Manual Industrial Serial Communication Cards ...
Page 10: ...PCI Communication User Manual x ...
Page 11: ...Chapter 1 1 Introduction ...
Page 16: ...PCI Communication User Manual 6 ...
Page 17: ...Chapter 2 2 Hardware Configuration ...
Page 22: ...PCI Communication User Manual 12 2 2 7 PCI 1622C Figure 2 7 PCI 1622C Silk Screen ...
Page 28: ...PCI Communication User Manual 18 ...
Page 29: ...Chapter 3 3 Driver Setup and Installation ...
Page 32: ...PCI Communication User Manual 22 ...
Page 34: ...PCI Communication User Manual 24 ...
Page 35: ...Chapter 4 4 ICOM Tools ...
Page 45: ...Chapter 5 5 Pin Assignments and Wiring ...
Page 58: ...PCI Communication User Manual 48 ...