Bray 6A Series O&M Manual - Manual (Page 21)

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 – Installable Options
6A O & M : 21
Installing the Mechanical Limit Switch Module
Mechanical Limit Switch Module
Function
This module is used to report two limits. These two limit switches
are voltage free and rated for 4A at 24V DC or AC 250V.
Device features
The mechanical limit switch module consists of:
• One binary output to display a collective fault message.
Compare with the device features of the alarm unit.
• Two switches to report two mechanically adjustable limits.
Both of these switches are electrically independent from the
remaining electronic unit.
Note: Only qualified personnel should be allowed to install and
connect the Mechanical Limit switch module
Proceed as follows to install the mechanical limit switch module:
1. Perform Step A to remove the module cover
2. Disengage the motherboard by carefully bending the four
brackets.
3. Insert the mechanical limit switch module from the top up to
the upper printed circuit board guide of the module rack.
4. Slide the mechanical limit switch module unit into the printed
circuit board of the module rack approximately 1 /
8
" towards
the right.
5. Screw in the special screw through the mechanical limit
switch module into the positioner shaft. Tighten the special
screw with a torque of 17.7 in-lbs.
NotICe
A pin in the actuating disc bearing is pressed. Align this pin
before it touches the special screw. You must rotate the actuating
disc bearing and the special screw simultaneously so that the pin
is inserted into the special screw.
An insulating cover is provided over the mechanical limit switch
module. Place the insulating cover to one side under the mother-
board seat on the container wall. The recesses of the insulating
cover must fit in the corresponding webs of the container wall.
6. Place the insulating cover on the mechanical limit switch
module by bending the container walls carefully.
7. Engage the motherboard into the four brackets.
8. Connect the motherboard and the optional modules to the
ribbon cables provided.
9. Connect the motherboard and the potentiometer to the
potentiometer cable.
10. Using both the screws, fasten the module cover provided.
Do not use the standard module cover.
11. Refer to Figures 10 and 11 to connect the Mechanical Limit
switch module in standard and intrinsically safe applications.
31
32
41
42
51
52
<35 V
24 V DC
max. AC 250V
4A AC/DC
24 V DC
max. AC 250V
4A AC/DC
1K21
10K Fault message
Limit value A1
Limit value A2
+
+
+
Mechanical limit switch
module 6DR4004-8K
Figure 10 - Mechanical limit switch module 6DR4004-8K, not Ex