188
Environment-resistive Terminals (IP66) Section 5-3
Internal Circuits The following diagram shows the internal circuits for the DRT1-OD08C Envi-
ronment-resistive Terminal.
Wiring
Note External power supply line 0V and output line G are connected internally, as
are external power supply line 24V and output line V. When output power is
supplied to external power supply connectors, power can be supplied to out-
put devices from output lines G and V provided that the total current does not
exceed 2.4 A. If the total current exceeds 2.4 A, the power must not be sup-
plied from the connector; it must be supplied externally instead.
Physical
layer
Photo-
coupler
Photocoupler
Photocoupler
DC-DC
converter
(Isolated)
Voltage
step-down
Photo-
coupler
Internal
circuitry
V+
CN1
(Communications
connector)
DRAIN
CAN H
CAN L
V–
0 V (for internal circuits)
0 V
(for outputs)
CN2
(External power
supply connector)
24 V
(for outputs)
Output 0
Output 1
CN3
CN4
24 V
(for internal
circuits)
DC-DC
converter
(Not
isolated)
Valve
Solenoid
Internal power
supply
I/O power
supply
(End surface)
Output 1
Output 0 Output 2
Output 4
Output 6
Output 7
Output 5
Output 3
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