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VP-EC-8KO

8 Channel Relay Output Modbus RTU RS485 Interface

Contents

Field Wiring and Block Diagram
Specifications
Modbus Functions and Register List
Calibration

The VP-EC-8KO is an 8 channel relay output module with a Modbus RTU RS485 interface.

Feeatures:

• RS485 Modbus RTU
• 9600, 19.2K Jumper Selectable Baud Rate, N,8,1, Half Duplex
• Channel LED lights when Relay Channel is Activated
• 1 FORM "C" (SPDT) 10A Contact per Channel

Field Wiring and Block Diagram

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Specifications

Item	Metric	Value
I/O	Part Name :	8 Channel Relay Output Modbus RTU RS485 Interface
	Part Number :	VPE-1821
	Channels :	8
	Relay Type :	Omron G5LE-14 Series
	Rating :	10A, SPDT
	Protection :	MOV on all contacts
Communication	Protocol :	Modbus RTU RS485
	Baud Rate	Jumper Selectable 9.6K, 19.2K (N81)
	Modbus ID	8 Position Dipswitch
	Termination	Jumper Selectable Enable or Disable 120 Ohm
	Wiring	2 sets of terminal blocks (+V, Data A, Data B, Common)
Processor	Processor :	PI18F Series
Field Connections	Terminal Qty :	33
	Method :	Screw, Rising Cage Clamp
	Torque :	0.753 N-m (4.3 Lb-in)
	Screw :	M3
	Voltage Rating :	300 VAC
	Current Rating :	15 A
	Withstanding Voltage :	1.6 KV
	Cross section solid conductor AWG min :	28
	Cross section solid conductor AWG max :	12
	Cross section stranded conductor AWG min :	28
	Cross section stranded conductor AWG max :	12
	Stripping Length :	6-7 mm
Physical	Length (DIN Enclosure) :	6.25"
	Width (DIN Enclosure) :	3.6"
	Height (DIN Enclosure) :	2.3"
	Weight (DIN Enclosure) :	150 g
	Weight, Shipping (Qty. 1) :	200 g
Electrical	Power Input Voltage Range (Typical :	24 VDC
	Power Input (Minimum) :	20 VDC
	Power Input (Maximum) :	28 VDC
	Current max :	200 mA (All Relays Energized)
	Current typical :	75 mA (All Relays De-energized)
Ambient	Operating Temperature :	-20 to +65 °C
	Storage Temperature :	-40 to +85 °C
	Operating Relative Humidity (non-condensing) :	0 to +95 %RH
	Storage Relative Humidity (non-condensing) :	0 to +95 %RH
	Protection - DIN Option :	IP20
Warranty	Limited Liability :	1 Year
	Download :	Warranty Statement

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Modbus Functions and Register List

Supported Modbus Functions

Function	Description
Function 01	Read Coils
Function 05	Write Single Coil
Function 15	Write Multiple Coils

Example 1 : Function 01 (0x01) Read Coils

Type	Byte	Byte Qty	Value
Request	Function Code	1 Byte	0x01
	Starting Address	2 Bytes	0x0000 to 0xFFFF
	Quantity of Coils	2 Bytes	1 to 2000 (0x7D0)
	CRC Checksum	2 Bytes	0x****
Response	Function Code	1 Byte	0x01
	Byte Count	1 Bytes	N* (N= Quantity of Outputs / 8, if the remainder is different of 0 ⇒N = N+1)
	Coil Status	n Bytes	n = N or N+1
	CRC Checksum	2 Bytes	0x****
Error	Function Code	1 Byte	0x81
	Exception Code	1 Bytes	01 or 02 or 03 or 04
	CRC Checksum	2 Bytes	0x****

Example 2 : Function 05 (0x05) Write Single Coil

Type	Byte	Byte Qty	Value
Request	Function Code	1 Byte	0x05
	Output Address	2 Bytes	0x0000 to 0xFFFF
	Output Value	2 Bytes	0x0000 or 0xFF00
	CRC Checksum	2 Bytes	0x****
Response	Function Code	1 Byte	0x05
	Output Address	2 Bytes	0x0000 to 0xFFFF
	Output Value	2 Bytes	0x0000 or 0xFF00
	CRC Checksum	2 Bytes	0x****
Error	Function Code	1 Byte	0x85
	Exception Code	1 Bytes	01 or 02 or 03 or 04
	CRC Checksum	2 Bytes	0x****

Example 3 : Function 15 (0x0F) Write Multiple Coils

Type	Byte	Byte Qty	Value
Request	Function Code	1 Byte	0x0F
	Starting Address	2 Bytes	0x0000 to 0xFFFF
	Qty of Outputs	2 Bytes	0x0001 to 0x07B0
	Byte Count	1 Bytes	N*
	Outputs Value	N * 1 Byte	Coil Values
	CRC Checksum	2 Bytes	0x****
Response	Function Code	1 Byte	0x0F
	Starting Address	2 Bytes	0x0000 to 0xFFFF
	Qty of Outputs	2 Bytes	0x0001 to 0x07B0
	CRC Checksum	2 Bytes	0x****
Error	Function Code	1 Byte	0x8F
	Exception Code	1 Bytes	01 or 02 or 03 or 04
	CRC Checksum	2 Bytes	0x****

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Calibration

The module does not require any calibration.

Test Function

1. Install a jumper inot the J1 header marked Test
2. Each relay sarting with K1 will energize and de-energize (1 second cycle) in turn as long as the jumper is installed

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