Nordson_EFD_781RC_Operating_Manual.pdf - 第6页

ENCLOSURE Cabinet Size (Length x Width x Depth): 25.4 x 20.3 x 10.2 cm (10 x 8 x 4") W eight: 6.5 kg (14 lb, 6 oz) Input AC (to power supply): 100–240 VAC ~ 50/60 Hz Output V oltage (from power supply): 24 VDC — 2.7…

Preventive Maintenance

As part of maintaining continuous trouble-free use of this product, EFD recommends a few very simple

preventative maintenance checks.

1. Periodically inspect tube-to-ﬁtting connections for proper ﬁt. Secure as necessary.

2. Check tubing for cracks and contamination. Replace tubing as necessary.

3. Check all wiring connections for looseness. Tighten as necessary.

4. If front panel of 8040 controller requires cleaning, use a clean, soft damp rag with a mild detergent

cleaner. DO NOT USE strong solvents (acetone, MEK, etc.) as they will damage the front panel

material.

5. Dry running time should be kept to a minimum — less than 5 minutes.

6. During initial pump startup and priming, pump speed should be kept low until ﬂuid reaches the

pump. Once primed, pump speed can be increased.

Turn off pump enclosure assembly before servicing any 781RC recirculating system components.

CAUTION

Disconnect electrical

power before

servicing unit.

WARNING

Rotating Shaft.

Rotating parts and shaft can

cause severe injury. Lockout

power before removing gaurd

RoHS标准相关声明标准相关声明 (China RoHS Hazardous Material Declaration)

产品名称

Part Name

有害物质及元素

Toxic or Hazardous Substances and Elements

铅 

Lead

(Pb)

汞 

Mercury

(Hg)

镉 

Cadmium

(Cd)

六价铬

Hexavalent

Chromium

(Cr6)

多溴联苯

Polybrominated

Biphenyls

(PBB)

多溴联苯醚

Polybrominated

Diphenyl Ethers

(PBDE)

外部接口

External Electrical

Connectors

X 0 0 0 0 0

O:表示该产品所含有的危险成分或有害物质含量依照EIP-A,EIP-B,EIP-C

的标准低于SJ/T11363-2006限定要求。

Indicates that this toxic or hazardous substance contained in all the homogeneous materials for this part, according to EIP-A, EIP-B, EIP-C is below the

limit requirement in SJ/T11363-2006.

X:表示该产品所含有的危险成分或有害物质含量依照EIP-A,EIP-B,EIP-C

的标准高于SJ/T11363-2006限定要求.

Indicates that this toxic or hazardous substance contained in all the homogeneous materials for this part, according to EIP-A, EIP-B, EIP-C is above the

limit requirement in SJ/T11363-2006.

781RC MicroMark Recirculating Spray Marking System

5www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.

ENCLOSURE

Cabinet Size (Length x Width x Depth): 25.4 x 20.3 x 10.2 cm (10 x 8 x 4")

Weight: 6.5 kg (14 lb, 6 oz)

Input AC (to power supply): 100–240 VAC ~ 50/60 Hz

Output Voltage (from power supply): 24 VDC — 2.7 Amp maximum

Power Requirements: 24 VDC — 2.0 Amp maximum

Ambient Operating Conditions: Temperature: 5° C to 45° C (41° F to 113° F)

Humidity: 85% RH at 30° C non-condensing

Height above sea level: 2000 meters max. (6562 ft)

NEMA Rating: Type 12 and 13

PUMP

Flow Capacity: Up to 88 liters per hour

Weight: 0.385 kg (13.6 oz)

Dimensions (Length x Max. Diameter): 130.5 x 56 mm (5.14 x 2.20")

Power Input: 24 VDC — 2.0 Amp maximum

Wetted Materials*: Pump body: 303SS

Gears: PEEK

Gasket: PTFE

Speed Control Signal: 0–10 volts DC

Pump Drive: Magnetic coupling

*Refer to speciﬁcations page in 781S installation guide for reference to wetted materials.

NOTE: Speciﬁcations and technical details are subject to engineering changes without prior notiﬁcation.

Specifications

781RC MicroMark Recirculating Spray Marking System

6 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.

Introduction

How the System Operates

The 781RC MicroMark

Recirculating Spray Marking System was

designed speciﬁcally to deal with pigmented inks and similar liquids that

have a tendency for solids within them to settle out of solution. The main

concern with settling is that the solids tend to clog the output of the

spray valve, especially at low ﬂow settings. The 781RC system prevents

clogging and allows the user to set the valve to low ﬂow values.

Unlike many other spray valve systems, the 781RC Recirculation

System does not use compressed air to create system pressure and

ﬂow. Instead, it uses a gear pump driven by a brushless direct current

electric motor. The motion of the gear pump keeps the ink mixed, and

since it is a positive displacement pump, the liquid is constantly moving.

The ﬂow in the system is controlled by the speed of the motor, which

is adjusted by a potentiometer within the pump enclosure. The internal

ﬂow path geometry within the 781RC* spray valve helps to prevent

settling as well. When the valve is not spraying, the ﬂow path in the

ﬂuid body keeps the liquid from stopping within the valve. Lastly, the

return line is oriented within the reservoir to promote mixing and prevent

settling.

*The 781RC system is also available with a 787MS-SS-RC MicroSpray

™

valve. Contact EFD for details.

Before You Begin — Power Input Options

Electrical connection options for pump enclosure assembly

+24 volt DC input for direct

wiring of pump enclosure from

a factory supplied 24 volt bus.

Screw type connection terminal

block.

Ground connection

from the 24 volt bus.

External power supply

input connector for

universal power supply

kit P/N 7013911.

781RC MicroMark Recirculating Spray Marking System

7www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.