CM3 – Wiring and Connection | Myostat Product Documentation

Typical Connection Example

Caution about Cabling

Be sure that the power is off before plugging or unplugging connectors.
Pay attention to straight insertion and removal of connectors by holding the connector's body.
Be sure there is no stress on connectors.
Be sure not to pull cables hard or hang CM3 by holding cables. It may result in damaging connectors.

The typical connection differs by control type as follows.

Pulse Type

* The communication cable is required when changing the CM3 settings from a PC.

I/O Type

Direct Type

* The I/O cable is required when the I/O (input/output) function is used in addition to command control from the host.

Connector Pin Layout and Functions

Pin layout and functions of CM3 cables are described below.

Main Connector

CM3 has a 24-pin connector on the top. The pin layout, names and functions are as follows. The functions of IN1 to IN6 depend on the selected control type.

No.	Name	Pulse Type Function	I/O Type Function	Direct Type Function
1	FG	Frame Ground	Frame Ground	Frame Ground
2	D_GND	Digital Ground	Digital Ground	Digital Ground
3	D_GND	Digital Ground	Digital Ground	Digital Ground
4	ALARM	Alarm Output	Alarm Output	Alarm Output
5	RXD0	RS232C Receive Data	RS232C Receive Data	RS232C Receive Data
6	OUT3	Output 3 / Z-phase	Output 3 / Z-phase	Output 3 / Z-phase
7	TXD0	RS232C Transmit Data	RS232C Transmit Data	RS232C Transmit Data
8	OUT2	Output 2 / B-phase	Output 2 / B-phase	Output 2 / B-phase
9	STO_IN-	STO Input -	STO Input -	STO Input -
10	OUT1	Output 1 / A-phase	Output 1 / A-phase	Output 1 / A-phase
11	IN6+	CW / Step / B-Phase Pulse +	Start・Stop	CW Inching・Jog
12	STO_IN+	STO Input +	STO Input +	STO Input +
13	IN5+	CCW / Dir / A-Phase Pulse +	Limit Sensor	CCW Inching・Jog
14	IN6-	CW / Step / B-Phase Pulse -	Start・Stop	CW Inching・Jog
15	IN_COM	IN1 to 4 Common	IN1 to 4 Common	IN1 to 4 Common
16	IN5-	CCW / Dir / A-Phase Pulse -	Limit Sensor	CCW Inching・Jog
17	IN3	Servo on/off	Select Motion Data	Servo on/off
18	IN4	Torque Limit	Select Motion Data	Manual Mode
19	IN1	CCW Limit Sensor	Origin/Limit Sensor	Origin/Limit Sensor
20	IN2	CW Limit Sensor	Select Motion Data	Limit Sensor
21	P-GND	Power Ground	Power Ground	Power Ground
22	P-GND	Power Ground	Power Ground	Power Ground
23	POWER	+24Vdc	+24Vdc	+24Vdc
24	POWER	+24Vdc	+24Vdc	+24Vdc

Connector: 55959-2430 (Molex)

Interface Cable A (400mm, 1000mm, 2000mm, 3000mm, 5000mm)

Product Number: CMIFA1-****WR (****: Cable Length)

Wires: 01 - 20 pin … AWG26 UL20276 (80℃ / 30V)
Wires: 21 - 24 pin … AWG24 UL20276 (80℃ / 30V)

Communication Cable A (1000mm, 2000mm, 3000mm, 5000mm)

Product Number: CMRSA1-****W (****: Cable Length)

Wires: AWG26 UL1007 (80℃ / 300V)

PC side

Color	No.	Name	Function
GRY	2	RXD	RS232C Transmit Data from PC
ORG	3	TXD	RS232C Receive Data from PC
WHT	5	D_GND	Digital Ground

CM3 side

Color	No.	Name	Function
ORG	1	RXD	RS232C Receive Data from CM3
GRY	2	TXD	RS232C Transmit Data from CM3
WHT	3	D_GND	Digital Ground

I/O Cable A (1000mm, 3000mm, 5000mm)

Product Number: CMIOA1-****S (****: Cable Length)

Wires: AWG28 UL758 Style2464 (80℃ / 300V)

The color of the wires is one of the two tables below. The functions of IN1 to IN6 depend on the selected control type — see the Main Connector pin table above.

Color	Dot	No.	Name	Function
PPL		1	IN1	Input 1
BLU		2	IN2	Input 2
GRN		3	IN3	Input 3
YLW		4	IN4	Input 4
ORG		5	IN5 +	Input 5 +
RED		6	IN5 -	Input 5 -
BLK		7	IN6 +	Input 6 +
BRW		8	IN6 -	Input 6 -
WHT		9	IN_COM	Input 1 to 4 Common
GRY		10	OUT1	Output 1 / A-phase
WHT	-	11	OUT2	Output 2 / B-phase
WHT	- -	12	OUT3	Output 3 / Z-phase
WHT	- - -	13	ALARM	Alarm Output
WHT	- - - -	14	D_GND	Digital Ground

Color	Dot	No.	Name	Function
PPL		1	IN1	Input 1
BLU		2	IN2	Input 2
GRN		3	IN3	Input 3
YLW		4	IN4	Input 4
ORG		5	IN5 +	Input 5 +
RED		6	IN5 -	Input 5 -
BLK		7	IN6 +	Input 6 +
BRW		8	IN6 -	Input 6 -
WHT		9	IN_COM	Input 1 to 4 Common
GRY		10	OUT1	Output 1 / A-phase
RED	-	11	OUT2	Output 2 / B-phase
YLW	-	12	OUT3	Output 3 / Z-phase
PNK	-	13	ALARM	Alarm Output
GRN	-	14	D_GND	Digital Ground

Power Cable A (1000mm, 3000mm, 5000mm)

Product Number: CMPWA1-****S (****: Cable Length)

Wires: AWG24 UL758 Style2464 (80℃ / 300V)

Color	No.	Name	Function
RED	1	POWER	+24Vdc
GRN	2	POWER	+24Vdc
BLK	3	P-GND	Power Ground
WHT	4	P-GND	Power Ground
GRY	5	STO_IN+	STO Input +
BLU	6	STO_IN-	STO Input -
BRW	7	FG	Frame Ground
-	8	N/A	N/A

Supplied Varistor

An overvoltage alarm occurs if the voltage on the power supply line exceeds 30 V due to regenerative voltage or other causes. The varistor absorbs the overvoltage and suppresses damage to the circuit. Please be sure to use the varistor after checking the installation and usage instructions.

* Overvoltage alarms cannot be avoided by installing the varistor.

How to use the Varistor

Connect one of the pins to a positive terminal and the other pin to a negative terminal on a power supply.
Operate the motor in a condition close to the application that the motor will be used in. Check the varistor's temperature. If it is heated over 40 degrees you may require a larger varistor or a voltage clipper.

Specification

Item	Value
Rated varistor voltage	27 V
Varistor Voltage Range	24 - 30 V
Max. Clamping Voltage	53 V at 25 A
Max. Allowable Voltage	AC 15 Vr.m.s. DC 19 V
Short-time Operating Voltage (5 minutes)	29 Vdc
Max. Energy (2ms)	40 J
Clip Voltage	35 - 36 V

Electrical Specifications

Item		Value	Applies to
Digital Input	Applied Voltage	0 - 26 [V]	All
Digital Input	Low Level Voltage	0.8 [V]	All
Digital Input	High Level Voltage	4.2 [V]	All
Pulse Input	Max. Input Pulse Frequency	1 [MHz]	Pulse
Pulse Input	Duty	50 ± 10%	Pulse
Digital Output	Withstanding Voltage	26 [V]	All
Digital Output	Max. Continuous Load Current	10 [mA]	All

Input/Output Circuit

* When not using the STO function, apply a voltage of 5 to 24V between STO+ and STO-.

Pulse Type

In the Pulse Type, IN5 is the CCW / Dir / A-Phase pulse input and IN6 is the CW / Step / B-Phase pulse input. See Circuit Connection for the line driver and open collector pulse input circuits.