INSTRUCTION MANUALDISCRETE OUTPUT MODULE(open collector output, 16 points)

MODEL

R3-DC16A

BEFORE USE ....

POINTS OF CAUTION

Thank you for choosing us. Before use, please check contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact our sales office or representatives.

■ CONFORMITY WITH EU DIRECTIVES• The equipment must be mounted inside the instrument
panel of a metal enclosure.
• The actual installation environments such as panel configurations, connected devices, connected wires, may affect the protection level of this unit when it is integrated
in a panel system. The user may have to review the CE
requirements in regard to the whole system and employ
additional protective measures to ensure the CE conformity.

■ PACKAGE INCLUDES:
Discrete output module.......................................................(1)■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■ INSTRUCTION MANUALThis manual describes necessary points of caution whenyou use this product, including installation, connection andbasic maintenance procedures.

■ HOT SWAPPABLE MODULES• Replacing the module does not affect other modules on
the same base. Thus, the module can be replaced while
the power is ON. However, replacing multiple modules
at once may greatly change live voltage levels. We highly
recommend to replace them one by one.
■ GENERAL PRECAUTIONS• DO NOT set the switches on the module while the poweris supplied. The switches are used only for maintenancewithout the power.
■ ENVIRONMENT• Indoor use.
• When heavy dust or metal particles are present in theair, install the unit inside proper housing with sufficientventilation.
• Do not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental temperature must be within -10 to +55°C(14 to 131°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
■ WIRING• Do not install cables close to noise sources (relay drive
cable, high frequency line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.

INSTALLATION
Use the Installation Base (model: R3-BSx).

MG CO., LTD. www.mgco.jp5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-8378 Rev.6P. 1 / 3

R3-DC16ACOMPONENT IDENTIFICATION■ FRONT VIEW

■ SIDE VIEW

RUN LED

ERR LED1234567891011121314151611121314151617181920

Output Status Indicator LEDs

123SW34543
2
1678ON

OutputHold910■ STATUS INDICATOR LED
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: Red LED; turns on with theoutput ON.

■ SIDE DIP SW• Output Hold: SW3-1
SW
SW3-1

OUTPUT HOLDOFF
HOLD (*)
OFFON(*) Factory setting
Note: Be sure to set unused SW3-2 through 3-4 to OFF.

TERMINAL CONNECTIONSConnect the unit as in the diagram below.
■ EXTERNAL DIMENSIONS unit: mm (inch)
27.5 (1.08)

1213
14
15
16
17
18
19
20

123

POSITIONING
GUIDE

20–M3
SCREW456786.2(.24)

130 (5.12)11109 (4.29)

910TERMINAL
COVER

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-8378 Rev.6P. 2 / 3

R3-DC16A*INTERNAL BUS B

INTERNAL POWER

WIRING INSTRUCTIONS
1 Do 1L

2 Do 2L

3 Do 3L

4 Do 4L

5 Do 5L

6 Do 6L

7 Do 7L

8 Do 8L

11 Do 9L

12 Do 10L

13 Do 11L

14 Do 12L

15 Do 13L

16 Do 14L

17 Do 15L

18 Do 16L

9 24V DC19 24V DC
10 COM
20 COM

24V DC*For dual redundant communication.

■ SCREW TERMINALTorque: 0.5 N·m■ SOLDERLESS TERMINAL
Refer to the drawing below for recommended ring tongueterminal size. Spade tongue type is also applicable. Solderless terminals with insulation sleeve do not fit.
Applicable wire size: 0.3 – 0.5 mm2
Recommended manufacturer: Japan Solderless Terminal
MFG. Co., Ltd., Nichifu Co., Ltd.
3max

4min
3.2 dia.

6max

INTERNAL BUS A

BUS CONNECTOR■ CONNECTION DIAGRAM

12max(mm)

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 Hold	
If both are in error, the module holds the signal andstands 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.

MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPANEM-8378 Rev.6

P. 3 / 3