MODEL: R3-PA8
Remote I/O R3 Series

SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to our web site.)/C01: Silicone coating/C02: Polyurethane coating/C03: Rubber coating
EX-FACTORY SETTING/SET: Preset according to the Ordering Information Sheet(No. ESU-8457)

TOTALIZED PULSE INPUT MODULE(Pi 8 points, 32 Bits)

27.5 [1.08]

RELATED PRODUCTS

130[5.12]

109[4.29]• Interface module (model: R3-NCx, R3-NCIE1, R3-NE1,R3-NMx, R3-NDx, R3-NFL1, R3-NP1, R3-NFx, R3-NML3.
R3-NF2: Firmware version V0.05 or later)
Note:• Count reset by host PC/PLC:
Available with this unit and the above mentioned interface
modules of firmware version V2.00 or later, except R3-NFx(R3-NM3: Firmware version V1.00 or later). Notice that
Count reset by host PC/PLC via R3-NFx or interface moduleof previous versions of firmware is unable.
• Count preset by host PC/PLC:
It is only available in combination with this unit displayed'SW3-4 RESET/PRESET' on the right side panel and theinterface module R3-NMx or R3-NE1 of firmware version
V2.00 or later. Count preset is not available for othercombination (R3-NM3: Firmware version V1.00 or later).
Notice that this function is not available in the same time ascount preset by host PC/PLC.
• In the FL-net Configuration Builder software (model: R3NFLBLD), the number of channel for this module isdisplayed as 16 because data has 8 channels x 2 words.

mm [inch]

MODEL: R3-PA8[1][2]ORDERING INFORMATION• Code number: R3-PA8[1][2]Specify a code from below for each of [1] and [2].
(e.g. R3-PA8W/A/CE/PRS/Q)• Specify the specification for option code /Q(e.g. /C01/SET)NO. OF CHANNELS
8: 8[1] COMMUNICATION MODE
S: Single
W: DualGENERAL SPECIFICATIONS[2] OPTIONS (multiple selections)Excitation
Blank: Internal (negative common)/A: External (24 V DC, negative common)Standards & Approvals
blank: Without CE/CE: CE marking
EX-FACTORY SETTING
blank: Enable count reset by host PC/PLC/PRS: Enable count preset by host PC/PLC
Other Options
blank: none
/Q: Option other than the above (specify the specification)

Connection
Internal bus: Via the Installation Base (model: R3-BSx)
Input: M3 separable screw terminal (torque 0.5 N·m)
Internal power: Via the Installation Base(model: R3-BSx)
Screw terminal: Nickel-plated steel
Isolation: Input to internal bus or internal power
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: Bi-color (red/green) LED;
Red with excitation abnormality;
Green in normal operating conditions.
Input status indicator: Red LED;1 to 8: Turns on with the input ON.
9 to 15: Unused
16: Turns on with the reset input ON.

R3-PA8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jpES-8457 Rev.13 Page 1/5

MODEL: R3-PA8Count reset: Via DIP switch on the side or one pulse to reset
input
Count setting from host PC/PLC: Count reset/count preset ischangeable via DIP switch on the side.

INPUT SPECIFICATIONS
Number of input: 9 (8 points + Count reset)
Input resistance: 6 kΩCommon: Negative commons, all points; 2 terminals
Maximum frequency: 100 Hz(ON/OFF time ≥ 5 msec.)This unit is designed to be able to accept a frequency up to100 Hz, however,‘chattering’ contact must be avoided for
accurate measuring of such high frequency. Use relays that
do not cause any chattering.
Totalized pulse range: 0 - 9999999
Count at overflow: Reset and restart at ‘0.’Max. pulse range selectable from 10000 to 2147483647
using the R3CON PC Configurator Software. ‘0’ or ‘1’ fromwhich restart counting at overflow is pre-settable. Refer tothe R3CON Users Manual for detailed information.
■ R3-PA8x (internal excitation)
Sensing voltage: 13 V DC (max. 24 V with no load)
ON voltage: ≥ 9 V (≤ 1.5 kΩ)OFF voltage: ≤ 4.5 V (≥ 18 kΩ)■ R3-PA8x/A (external excitation)
Sensing voltage: 24 V DC
ON voltage: ≥ 9 V (≤ 12 kΩ)OFF voltage: ≤ 4.5 V (≥ 36 kΩ)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: 200 g (0.44 lb)

PERFORMANCE
Data allocation: 16
Current consumption: 70 mAInsulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute(input to internal bus or internal power)2000 V AC @ 1 minute (power input to FG; isolated on thepower supply module)

EMS EN 61000-6-2
RoHS Directive

COUNT RESET
There are three different ways to reset count value.
■ COUNT RESET WITH DIP SW
1) Remove Network Module or its cables and interrupt
communication with other devices.
2) Turn ON the Count Reset SW (DIP SW3-1) on R3-PA8module.
3) Return the module to the base and turn the power supplyon.
4) ERR LED turns on and the module starts resetting itscounter. When the resetting is complete, the LED turns togreen. DO NOT remove the power while the red LED is on.
5) After confirming that ERR LED is green, turn the power
supply off.
6) Turn OFF the Count Reset SW (DIP SW3-1).
7) Return the Network module onto the base and turn thepower supply on.
Note: Count Reset SW must be turned OFF after thisprocedure because the module does not start counting withON state. Even when the count overflow set value is 1, thecounter is reset to 0.
■ COUNT RESET WITH RESET SIGNAL
With the Count Reset Input SW (DIP SW3-3) turned ON, thecount reset signal value becomes effective.
SW3-3 = OFF: invalid
SW3-3 = ON: valid
One pulse supplied at the Count reset input terminal will berecognized as a reset signal.
1) ERR LED turns on (red color) when the reset signal isreceived.
2) In 1 second, the module starts resetting its counter.
When the resetting is complete, the LED turns to green.
3) After 1 second, ERR LED turns back to the state before
the reset signal has been received.
Note: Reset signals received while the module is processing(1) through (3) are ignored. Even when the count overflow
set value is 1, the counter is reset to 0.
■ COUNT RESET FROM HOST PC/PLC
Refer to “COUNTER SETTING FROM HOST PC/PLC” section
hereafter.

STANDARDS & APPROVALS
EU conformity:
EMC Directive
EMI EN 61000-6-4
R3-PA8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-8457 Rev.13 Page 2/5

MODEL: R3-PA8
EXTERNAL VIEW
■ FRONT VIEW

■ SIDE VIEW

RUN LEDERR LED9101112131415161234567811121314151617181920Status Indicator LED

1Functions

234SW354321678Count Settingfrom Host PC/PLC
Count Reset Input
Count ResetON910Set the Count Reset SW to OFF to start counting.

COUNTER SETTING FROM HOST PC/PLC■ COUNTER RESET(Available for R3-NCx, R3-NCIE1, R3-NE1, R3-NMx, R3-NDx, R3-NFL1, R3-NP1, R3-NML3 (Firmware version 2.00 or later,
R3-NM3: Firmware version V1.00 or later))
Setting SW3-4 OFF and turning power on enable the function.
The bits indicating the channels to reset counter are allocated in the first word from host PC/PLC.
When these bits are changed from 0 to 1, the counter is reset. When it is confirmed that the counter is reset, return to 0.
Notice that if the bit remains at 1, the next reset will not work.
150Count reset CH.1
Count reset CH.2
Count reset CH.3
Count reset CH.4
Count reset CH.8
UnusedUnused■ COUNTER PRESET(Available in combination with R3-NE1, R3-NMx (Firmware version 2.00 or later, R3-NM3: Firmware version V1.00 or later), andR3-PA8 displayed ‘SW3-4 RESET/PRESET’ on the right side)
Setting SW3-4 ON and turning power on enable the function.
Write the preset value to the Holding Resisters, which has same address as the Input Resisters.
When writing the same preset value consecutively, perform the following steps.
- Reset the power of the main unit.
- Temporarily write a different preset value. (e.g. 1000 > 2000 > 1000 etc.)• Input Resisters• Holding Resisters

Address

Addressn+0

Input 1

n+1
n+2

n+15

Input 2n+2Preset value of Input 2n+3

Input 8n+14

Preset value of Input 8

n+15

R3-PA8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

Preset value of Input 1n+1n+3n+14n+0ES-8457 Rev.13 Page 3/5

MODEL: R3-PA8EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
27.5 [1.08]

121314151617181920123POSITIONING
GUIDE

20–M3SCREW

4566.2[.24]

130 [5.12]11109 [4.29]

78910TERMINALCOVER

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM■ R3-PA8x■ R3-PA8x/A
STATUS
RUN LED ERR LED INDICATOR LEDPi 1 1Pi 2 2Pi 3 3Pi 4 4Pi 5 5Pi 6 6Pi 7 7Pi 8 8111213**

141516172345678

Input Circuit
Pi 1 16Pi 6 6111213141514161517CountResetCOM (+)

INTERNAL POWER

DIP SW

8Pi 8 813

INTERNAL BUS B*

7Pi 7 7**

INTERNAL BUS A

5Pi 5 5

12ControlCircuit

4Pi 4 41193

Pi 3 3

10CommunicationCircuit

2Pi 2 2916Count
18Reset1

BUS CONNECTOR

Input Circuit
118910111213141516+24V

9**191020

190V

100V

20
Numbers in italic indicate LED No.s assigned to the front panel LEDs.
*For dual redundant communication.
**DO NOT use the terminals No. 9, 11 through 17 and 19.

R3-PA8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-8457 Rev.13 Page 4/5

MODEL: R3-PA8Specifications are subject to change without notice.

R3-PA8 SPECIFICATIONS

MG CO., LTD.
www.mgco.jp

ES-8457 Rev.13 Page 5/5