Omron CQM1H-SCB41 3 RS-422A/485 Port, Applicable Connectors, Recommended Cables, Distance

Installation Section 2-1

!Caution Do not connect the 5-V power supply of pin 6 to any external device other than an NT-AL001-E Link Adapter. Otherwise, the external device and the Serial Com- munications Board may be damaged.

The following cables are provided for connection to NT-AL001-E Link Adapters.

We recommend that these cables be used.

NT-AL001-E connecting cables: XW2Z-070T-1 (0.7 m)

	XW2Z-200T-1 (2 m)
Applicable Connectors	Socket: XM2A-0901 (OMRON) or equivalent
	Hood: XM2S-0911-E (OMRON, conforms to ESD) or equivalent
	One Socket and one Hood are provided for each port.
Recommended Cables	UL2464 AWG28 5P IFS-RVV-SB (UL-approved, Fujikura Ltd.)
	AWG28 5P IFVV-SB (not UL-approved, Fujikura Ltd.)
	UL2464-SB (MA) 5P 28AWG (7/0.127) (UL-approved, Hitachi Cable, Ltd.)
	CO-MA-VV-SB 5P 28AWG (7/0.127) (not UL-approved, Hitachi Cable, Ltd.)
	Cable length: 15 m max.

2-1-3 RS-422A/485 Port

Protocol	Host Link	No-protocol	Protocol macros	1:1 Data Links	1:N NT Links	1:1 NT Links
Communica-	Half-duplex
tions method
4-wire, 1:1	OK	OK	OK	OK	OK	OK
4-wire, 1:N	OK	OK	OK	No	OK	No
2-wire, 1:1	No	No	OK	No	OK	No
2-wire, 1:N	No	No	OK	No	OK	No
Synchroniza-	Start-stop synchronous (asynchronous)
tion
Baud rate	1,200/2,400/4,800/9,600/ 19,200 bps			19,200 bps	38,400 bps	19,200 bps
Connections	1:N (N: 32 Units max.)			1:1	1:N (N: 8 Units	1:1
					max.)
Transmission	500 m max.
distance	(The total combined cable length is 500 m max. T-branch lines must be a maximum of 10 m long.)
Interface	Complies with EIA RS-485

Connector Pin Layout

Pin No.	Abbreviation	Signal name	I/O
1 (See note 1)	SDA	Send data –	Output
2 (See note 1)	SDB	Send data +	Output
3	NC	Not used	---
4	NC	Not used	---
5	NC	Not used	---
6 (See note 1)	RDA	Receive data –	Input
7	NC	Not used	---
8 (See note 1)	RDB	Receive data +	Input
9	NC	Not used	---
Shell (See note 2)	FG	Shield	---

Note 1. When 2-wire connections are used, use pins 1 and 2, or pins 6 and 8.

2.The shell is connected to the ground terminal (GR) of the Power Supply Unit inside of the Serial Communications Board. Therefore, the cable shield can be grounded by grounding the GR of the Power Supply Unit.

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