BURKERT 710357 Type 8640 modular valve island for pneumatics is designed to solve diverse and complex control problems due to its systematic modular construction and combination of pneumatic and electrical interfaces. By putting together a row of pneumatic modules with different numbers of valves, 2 to 24 valve functionalities may be realized on one valve unit. Electrical connectivity is achieved by either fieldbus interfaces, common connection (parallel connection technique) or multipin interfaces. The valves allow different applications to be covered. Bodies and connection modules are made of high-quality plastic (polyamide) and are easy to assemble by means of the built-in snap connectors.

Product Connections

Collective Connection Modules and Multipole Modules

Module	Description
Collective connection module	Connection via individual stranded wires, looped-through ground potential, max. 24 valves, degree of protection IP20, screw-type terminals.
Multi-pin module Valve outputs	Max. 24 valves, degree of protection IP20, electrical connection plug D-Sub (2-pin).

Fieldbus Modules

Available for PROFIBUS DP, PROFINET IO, EtherNet/IP, and Modbus TCP.

• Max. 24 valves
• Degree of protection IP20
• Max. 32 digital inputs (in connection with EME module)
• Power supply with rectangular plug (4-pin)

Installation

WARNING

Risk of injury due to high pressure and escaping medium. Switch off the pressure before working on the device or system. Vent or drain the pipes.

Installing Multiple Blocks

1. Begin installation with the connection module on the left.
2. Check modules for complete installation with 2 O-rings each.
3. Lightly oil or grease all O-rings before engaging.
4. Engage the lower latch hooks of the module to be attached in the latch grooves of the preceding module. Make sure that the O-rings are properly seated.
5. Press the module to be locked upwards slightly and engage the upper latch hook.
6. Insert 3 O-rings into the recess on the back of the valve and ensure that the seal is properly fitted.

TIP

Crushed O-rings and profile seals lead to leaky blocks. Fasten each valve to the base module with 2 screws. Recommended tightening torque 0.6 ±0.1 Nm.

Valve Block Installation

Standard rail installation:

• Hook the valve block with the upper groove into the standard rail (35 x 15 or 35 x 7.5 EN 50022).
• Snap the lower clamping pieces into the standard rail.
• Tighten the screws on the clamping pieces.

Wall installation:

• Fasten the valve block directly to the wall with M4 screws.

Tightening Torques for Port Connections

Observe the following tightening torques when screwing into the port connections. The specified tightening torque may vary depending on the sealing system.

Port size	Marking/function	Recommended tightening torque [Nm]	Maximum tightening torque [Nm]
G1/4, NPT1/4	P, R/S connection	4...7	20
G1/8, NPT1/8	P, R/S connection A/B valve outlets	3...6	7

Electrical Installation of Cable Plugs

1. Screw on the cable plug, observing the maximum tightening torque of 0.3 Nm.
2. Check that the seal is correctly fitted.
3. Connect the protective conductor and check electrical continuity between coil and housing.

Maintenance and Troubleshooting

Fault	Possible cause	Remedy
Valves do not switch	No operating voltage or operating voltage too low	Check electrical connection. Ensure operating voltage according to type label.
	Manual override not in zero position	Bring manual override to zero position.
	Pressure supply insufficient or not available	Set up large-volume pressure supply. Minimum operating pressure ≥ 2 bar.
Valves switch with a delay or blow off at the exhaust ports	Pressure supply insufficient or not available	Set up large-volume pressure supply. Minimum operating pressure ≥ 2 bar.
	Valves are not in the home position (de-energised) during pressure build-up	Apply pressure to the valve block before the valves are switched.
	Insufficient ventilation of the exhaust air ducts due to too small or dirty silencers	Use suitably sized silencers or expansion vessels. Clean the dirty silencers.
Leaky valve blocks	Missing or crushed O-rings between the modules	Identify leak or missing seals.
	Missing or incorrectly positioned flat seals between valve and base plate	Insert missing seals or replace damaged seals.