MODEL: R3-DC8
Remote I/O R3 Series

GENERAL SPECIFICATIONSConnection
Internal bus: Via the Installation Base (model: R3-BSx)
Output: M3 separable screw terminal (torque 0.5 N·m)
Internal power: Via the Installation Base (model: R3-BSx)
Screw terminal: Nickel-plated steel
Isolation: Output 1 to output 2 to output 3 to output 4 tooutput 5 to output 6 to output 7 to output 8 to internal bus
or internal power
Output hold setting: Setting for communication error withside DIP SW
RUN indicator: Bi-color (red/green) LED;
Red when the bus A operates normally;
Green when the bus B operates normally;
Amber when both buses operate normally.
ERR indicator: Green LED turns on in normal operating
conditions.
Output status indicator:
1 to 8: Red LED; turns on with the output ON.
9 to 16: Unused

DISCRETE OUTPUT MODULE(Do 8 points (relay))
27.5 [1.08]

130[5.12]

109[4.29]

mm [inch]

MODEL: R3–DC8[1][2]ORDERING INFORMATION• Code number: R3-DC8[1][2]Specify a code from below for each of [1] and [2].
(e.g. R3-DC8W/CE/Q)• Specify the specification for option code /Q(e.g. /C01)

OUTPUT SPECIFICATIONS

NO. OF CHANNELS
8: 8[1] COMMUNICATION MODE
S: Single
W: Dual[2] OPTIONS (multiple selections)Standards & Approvals
blank: Without CE/CE: CE marking
Other Options
blank: none
/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to our web site.)/C01: Silicone coating/C02: Polyurethane coating/C03: Rubber coating

Output: Relay contact, 8 points
Common: 1 point 1 common (8 terminals)
Maximum load current: 2.0 A per point
Relay driving power: 24 V DC ±10 %, ≥ 60 mA
Maximum outputs applicable at once: No limit (at 24 V DC)
Contact rating: 250 V AC @ 2 A (cos ø = 1)
30 V DC @ 2 A (resistive load)(Limited to less than 50 V AC in order to conform with EUDirective)
Maximum switching voltage: 250 V AC or 30 V DC
Maximum switching power: 500 VA or 60 W
Minimum load: 24 V DC @ 5 mA
Mechanical life: 2 × 107 cycles (300 cycle/min.)
When driving an inductive load, external protection isrecommended.
ON delay: ≤ 10 msec.
OFF delay: ≤ 10 msec.

INSTALLATION
Operating temperature: -10 to +55°C (14 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Atmosphere: No corrosive gas or heavy dust
Mounting: Installation Base (model: R3-BSx)
Weight: 190 g (0.42 lb)

R3-DC8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-8291 Rev.6 Page 1/4

MODEL: R3-DC8
PERFORMANCE
Data allocation: 1
Current consumption: Approx. 60 mA
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @ 1 minute(output 1 to output 2 to output 3 to output 4 to output 5 tooutput 6 to output 7 to output 8 to internal bus or internalpower)2000 V AC @ 1 minute (power input to FG;
isolated on the power supply module)

STANDARDS & APPROVALS
EU conformity:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive

FUNCTIONS■OUTPUT HOLD or OUTPUT OFF
In normal conditions, the module outputs the signal fromthe preferred bus A.
When an error is detected, the output is switched to thedata from the bus B.
• Output HoldIf both are in error, the module holds the signal and stands
by until one of the communications recovers.
• Output OFF
If both are in error, the module outputs OFF signals andstands by until one of the communications recovers.
At the startup, it outputs OFF until the communication isestablished and normal data is received.

EXTERNAL VIEW
■ FRONT VIEW

■ SIDE VIEW

RUN LED
Status Indicator LED

91011
12
13
14
15
16

12345678

111213
1415
16
1718
1920

ERR LED

123SW345432
1678
910

R3-DC8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

OutputHoldONES-8291 Rev.6 Page 2/4

MODEL: R3-DC8
DATA ASSIGNMENT■ Do
150Do 1Do 2Do 3Do 80 : OFF
1 : ONEXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
27.5 [1.08]

12131415161718192012320–M3SCREW

45678910TERMINAL
COVER

R3-DC8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

POSITIONING
GUIDE

6.2[.24]

130 [5.12]11109 [4.29]

ES-8291 Rev.6 Page 3/4

MODEL: R3-DC8SCHEMATIC CIRCUITRY & CONNECTION DIAGRAMRUNLEDERR
LEDSTATUS
INDICATORLED

DIP SW OutputCircuit* INTERNAL BUS B

INTERNAL POWER

BUS CONNECTORRyINTERNAL BUS A

1Communication
Circuit

1 Do 111 COM 1Ry22 Do 2
12 COM 2Ry33 Do 313 COM 3RyControlCircuit

44 Do 414 COM 4Ry

55 Do 515 COM 5Ry

66 Do 616 COM 6Ry

77 Do 717 COM 7Ry

88 Do 818 COM 89 +24V
19 +24V
24V DC

10 0V
20 0V
Numbers in italic indicate LED No.s assigned to the front panel LEDs.
* For dual redundant communication.

■ Output Connection Examples
ࠉ1 point 1 common
Do 1 1COM 1 11Do 8−＋＋−−＋＋−

8COM 8 18

Specifications are subject to change without notice.

R3-DC8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-8291 Rev.6 Page 4/4