4. WIRING
IMR01Y09-E3
17
4.4 Wiring to the Controllers
Conduct wiring between the COM-JH and controller (FB400/FB900) as shown in the following.
When conducting wiring to the FB400/FB900, always conduct wiring to the
Communication 1 terminal.
FB400/FB900 communication terminal number and signal details
Terminal No.
Signal name
Symbol
25 Signal
ground
SG
26 Send/receive
data
T/R
(A)
27 Send/receive
data
T/R
(B)
Wiring
RS-485
Paired wire
Shielded twisted
pair wire
Controller
Communication terminals
(communication 1 side)
Controller
Maximum controller connections: 31 controllers
*R
*R: Termination resistors (Example: 120
Ω
1/2 W)
25
T/R (B)
T/R (A)
26
27
SG
25
T/R (B)
T/R (A)
26
27
SG
COM-JH
T/R (A)
SG
T/R (B)
4
1
5
*R
Terminal block
Communication terminals
(communication 1 side)
(
−
)
(
+
)
(
−
)
(
+
)
(
−
)
(
+
)
The cable is provided by the customer.
The termination resistor existing within the COM-JH can be connected or disconnected by
the switch. (Factory set value: Termination resistor connected)
[See
4.5 Termination Resistor (P. 18)
]
