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DK Digital CDB-700 Instruction Manual Page 12

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3. WIRING
IMR02C16-E3
6
3.1.2 Wiring method
Connection to the RS-485 port of the host computer (master)
Host computer (Master)
RS-485
Paired wire
Shielded twisted
pair wire
Controller (Slave)
Maximum connections: Up to 31 controllers
*R
*R: Termination resistors (Example: 120 Ω 1/2 W )
If communication errors occur frequently due to the
operation environment or the communication distance,
connect termination resistors.
*R
T/R (B)
T/R (A)
SG
T/R (B)
T/R (A)
SG
T/R (B)
T/R (A)
SG
Screw Size: M3
×
7 (with 5.8
×
5.8 square washer)
Recommended tightening torque:
0.4 N･m (4 kgf･cm)
Specified solderless terminals:
Manufactured by J.S.T MFG CO.,LTD.
Circular terminal with isolation V1.25-MS3
(M3 screw, width 5.5 mm, hole diameter 3.2 mm)
(+)
(−)
(+)
(−)
(+)
(−)
y
y
y
Controller (Slave)
13 (25)
14 (26)
15 (27)
13 (25)
14 (26)
15 (27)
Connection to the RS-232C port of the host computer (master)
Use a RS-232C/RS-485 converter with an automatic send/receive transfer function.
RS-485
Paired wire
Shielded twisted
pair wire
Maximum connections: Up to 31 controllers
T/R (B)
T/R (A)
SG
T/R (B)
T/R (A)
SG
(+)
(−)
(+)
(−)
y
y
y
RS-232C/RS-485
converter
T/R (B)
T/R (A)
SG
Host computer
(master)
RS-232C
Controller (Slave)
Controller (Slave)
*R
*R: Termination resistors (Example: 120 Ω 1/2 W)
If communication errors occur frequently due to the
operation environment or the communication distance,
connect termination resistors.
*R
Screw Size: M3
×
7 (with 5.8
×
5.8 square washer)
Recommended tightening torque:
0.4 N･m (4 kgf･cm)
Specified solderless terminals:
Manufactured by J.S.T MFG CO.,LTD.
Circular terminal with isolation V1.25-MS3
(M3 screw, width 5.5 mm, hole diameter 3.2 mm)
Recommended converter:
CD485, CD485/V manufactured by
Data Link, Inc. or equivalent.
13 (25)
14 (26)
15 (27)
13 (25)
14 (26)
15 (27)
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