937B Controller Instruction Manual
pg. 86
10
Maintenance of Series 937B Controller
Modules
Lethal voltages are present in the controller when it is powered. Disconnect
the power cable before disassembly. Do not connect or disconnect any electrical
connectors while power is applied to the equipment (hot swapping). Doing so
may cause damage to the equipment or severe electrical shock to personnel. This
hazard is not unique to this product.
The service and repair information in this manual is for the use of Qualified Service
Personnel. To avoid shock, do not perform any procedures in this manual or perform any
servicing on this product unless you are qualified to do so.
Suitable ESD handling precautions should be followed while installing, configuring
or adjusting the instrument or any modules.
There are 3 sensor module slots (A, B, and C) available in the 937B Controller. Sensor module plug-in
boards (Pirani/CP, Capacitance Manometer, Cold Cathode, Hot Cathode) can be inserted into any
available slot and the controller will automatically recognize the type of the module in the slot. Typically,
937B Controllers are shipped with customer-specified sensor modules.
To change the controller configuration by removing and installing modules, follow the steps shown below.
10.1 Removing and Installing a Sensor Module
To remove a module:
1. Assure that the 937B power is OFF, and the power cord is disconnected.
2. Use a #1 Phillips screwdriver to remove the two screws on the top and bottom of the rear panel of
the module.
3. Use a small, flat-blade screwdriver to gently pry the module away from the rear panel frame until
it slides freely.
4.
Carefully
slide the module out.
5. Place the module on a static-protected workbench.
To install a module:
A pressure sensor module (with 32-pin DIN) can only be inserted into slots
A, B or C. It will not fit into the COM slot!
1. Make sure that the controller power is OFF and the power cord is disconnected.
2. If there is a blanking panel over the slot, use a #1 Phillips screwdriver to remove the two screws
on the top and bottom of the blank panel.
3. Align the module to fit and slide freely in the
card guides
, with the internal 32-pin DIN connector
end first.
4. Gently slide the module forward.
5. Use a #1 Phillips screwdriver to tighten two screws on the top and bottom of the rear panel of the
module.