RKC INSTRUMENT Z-TIO-G, Instruction Manual

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5. WIRING
IMS01T28-E4
5-11
5.5 Installation of Termination Resistor
When connecting termination resistors to each end of the RS-485 communication line, follow the procedure
below to connect the resistor to the SRZ end.
For the termination resistor on the host computer side, connect it so as to satisfy the host
computer used.

Mounting position
Connect a termination resistor between the communication terminals (No. 3 and 4) of the module at the end
of the communication line from the host computer.

When two or more Z-TIO module are connected
 When two or more Z-DIO module are connected to Z-TIO module
(Base)
3 4 5
SG
T/R(A) T/R(B)
Termination resistor
(Example: 120

1/2 W)
To host computer
Recommended tightening torque:
0.4 N
･
m (4 kgf
･
cm)
Host
computer
(master)
RS-485
SRZ unit (slave)
Z-TIO module
Connect the termination
resistor to this module.
Internal communication line
(RS-485)
Termination resistor
Host
computer
(master)
RS-485
SRZ unit (slave)
Z-TIO module
Connect the termination
resistor to this module.
Z-DIO module
Internal communication line (RS-485)
Termination resistor