RKC INSTRUMENT PG500, Инструкция по эксплуатации системы связи

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2. HOST COMMUNICATION
IMR02F04-E1
7
2.2.2 Connection to the RS-422A port of PG500

Communication terminal number and signal details (RS-422A)
RS-485

Connection to the RS-422A port of the host computer (master)
The cable and termination resistor (s) must be provided by the customer.
Terminal
No.
Signal name Symbol
25 Signal ground SG
26 Send data T (A)
27 Send data T (B)
28 Receive data R (A)
29 Receive data R (B)
Host computer (Master)
RS-422A
Paired wire
PG500 (Slave)
T (B)
T (A)
R (B)
R (A)
SG
Shielded twisted
pair wire
25
26
27
28
29
SG
T (B)
T (A)
R (B)
R (A)
(

)
(

)
(

)
(

)
PG500 (Slave)
(

)
(

)
(

)
(

)
25
26
27
28
29
SG
T (B)
T (A)
R (B)
R (A)
(

)
(

)
(

)
(

)
Screw size: M3
×
7 (with 5.8
×
5.8 square washer)
Recommended tightening torque:
0.4
N
･
m (4 kgf
･
cm)
Recommended solderless terminals:
Manufactured
by J.S.T MFG CO., LTD.
Circular terminal with isolation V1.25-MS3
(M3 screw, width 5.9 mm, hole diameter 3.2 mm)
*R: Termination resistors (Example: 120

1/2 W)
If communication errors occur frequently due to the
operation environment or the communication distance,
connect termination resistors.
*R
*R
*R
*R
Maximum connections:
Up to 31 instruments



Communication terminals
PG500 rear view
29 28 27 26 25