Bray 6A Series O&M Manual User Manual

Page 8

All information herein is proprietary and confidential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc.

The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.

Series 6A Operation & Maintenance – field Connections

6A O & M : 8

Connecting Pneumatic Supply Lines
Refer to the Technical Data portion of this manual for specifica-

tions regarding air quality.
The S6A is equipped with three pneumatic connections, Y1, Y2

and PZ. PZ is for the pneumatic supply and Y1 and Y2 are used

to supply the pneumatic actuator. The S6A can also be equipped

with a pressure gauge block for monitoring supply and actuating

pressure and a filter to ensure that the S6A is receiving clean air.
Proceed as follows to make the pneumatic connections:
Refer to Figure 2.

Figure 2 - Pneumatic connection on the standard controller

1. If required, connect the pressure gauge block for supply air

and actuating pressure.

2. Connect supply air to PZ.

Connection using female thread G1/4 DIN 45141

or 1/4" NPT:
• PZ supply air 20psi to 102psi (1.4 to 7 bar)
• Y1: actuating pressure for single and double-acting

actuators

• Y2: actuating pressure for double-acting actuators
• E: exhaust air outlet; remove the attenuator if required.

For double-acting actuators, connect actuating pressures

Y1 or Y2 depending on the desired safety position. The

three pneumatic connections will go to the following

safety position in case of electrical auxiliary power sup-

ply failure:
• Y1: single-acting, depressurized
• Y1: double-acting, max. actuating pressure/supply air

pressure.

• Y2: double-acting, depressurized

Note: Besides continuous air consumption, the positioner may

try to compensate the position deviation due to leakage. This

will lead to premature wear in the entire control unit. To prevent

this ensure that all pneumatic connections are properly sealed

and perform regular maintenance on their fittings.