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RPM Installation
Step
Make required equipment connections to the connection units as shown in Figures 9-2, 9-3, and 9-4.
Correct polarity must be maintained. Cable is provided by installer; length should not exceed 100 ohms per
wire.
Route the wires connected to the module through the open-faced bottom of the connection unit. Place a
cable tie through the opening at the bottom of the connection unit and around the connected wires for
strain relief. (See Figures 9-2, 9-3, and 9-4.)
TB102 is used for communications input/output within the connection units. Use ONLY ABB shielded
twisted pair cable per Comcode 407377704 to wire the communications bus as shown in Figure 9-5. This
cable is designed to the specific impedance necessary for optimum use in this bus wiring application.
Polarity is not essential for this input/output communications bus wiring (expect for the shield).
To verify that no shorts exist between any of the three cable connections (blue, white, or shield) on the
final bus module, place a terminating resistor (560 ohm, comcode 405298308) in the socket of the final bus
module for each of the three buses. Measure the resistance across the blue and white wires of the module
containing the terminating resistor. The resistance measurement should be in the range of 560-600 ohms.
5
Using a jeweler's screwdriver, set the address on each module before it is attached to the connection unit.
(See Figure 9-6.) Secure each module to the connection unit with the two clips provided. Write the
connected equipment description and module address on the label on the front of the module.
Caution: Each module requires a unique address for proper communications between the module and
controller. All addresses are valid except 00. No two modules should have the same address! The unique
address is set via two switches (SW1 - Hi and SW2 - Low) located on the remote peripheral monitoring
module. The switch display numbers/letters are in hexadecimal.
For example:
SW1-Hi = D SW2-Low = 8
(The HEX address is D8)
6
Connect from the first module back to the controller circuit pack as shown in Figure 9-5. Wrap each bus wire
twice through one of the supplied 406712968 inductor beads prior to its termination at the controller.
Note: Use only one inductor bead for each bus.
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RPM Installation
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