RKC INSTRUMENT Z-TIO-G, Instruction Manual, Page: 47 / 246

5. WIRING
IMS01T28-E4
5-9

Terminal number and signal details
Terminal No. Signal name Symbol
3 Send data/Receive data T/R (A)
4 Send data/Receive data T/R (B)
5 Signal ground SG
Install a ferrite core on the communication cable close to the Z-TIO-G.
Recommended ferrite core: ZCAT1325-0530 (TDK Corporation)
To host computer
Ferrite core:
ZCAT1325-0530 (TDK Corporation)
Communication cable
(Base)
3 4 5
 Wiring figure
 Connection to the RS-485 port of the host computer (master)
Host computer (Master)
RS-485



Pair wire
SRZ unit
R
SG
T/R (B)
T/R (A)
Z-TIO module
(Slave)
SG 5
T/R (A) 3
4 T/R (B)
SG 5
T/R (A) 3
4 T/R (B)
R
(

)
(

)
(

)
(

)
(

)
(

)
Z-TIO module
(Slave)
Shielded twisted
pair wire
Connected by
the internal
communication line
R: Termination resistor (Example: 120

1/2 W)
If communication errors occur frequently due to
the operation environment or the communication
distance, connect termination resistors.
Up to 16 Z-TIO modules can be connected.
The maximum number of SRZ modules (including other function modules) on the same communication line is 31.
The cable and termination resistors must be provided by the customer.
For installation method of termination resistor of the SRZ side, refer to 5.5 Installation of
Termination Resistor (P. 5-11) .
(Base)
3 4 5