Figure 27: Termination Block Showing Rtd, Communication, And Electrical Connections - ABB 266 MODBUS User Manual

4. Wire the RTD sensor cable to the transmitter RTD terminals.
a. Using a small phillips screwdriver, loosen the shield wire terminal (Figure 27).

Figure 27: Termination block showing RTD, communication, and electrical connections

b. Connect the sensor cable to the designated terminal.
c. Loosen RTD terminals 1 through 4.
d. Connect one each white wire to terminals 1 and 2 and tighten the terminal screws.
e. Connect one each black wire to terminals 3 and 4 and tighten the terminal screws.
5. Run the connecting signal/voltage cable(s) from the Host device through the appropriate cable gland or cord grip housing
(single or dual wire) and into the cable entry if not already completed.
IMPORTANT NOTE: If power and communications are not in the same cable, an adapter can be purchased that
will allow two (2) cables to be located in the same cable gland or cord grip housing.
6. Connect the power (+) wire to the PWR (+) terminal.
7. Connect the power (-) wire to the PWR (-) terminal.
8. Connect RS-485 (A) (+) to COMM (+) terminal.
9. Connect RS-485 (B) (-) to COMM (-) terminal.
10. If the cable is provided with a shield or multiple shields and these are not terminated at the RS-485 master, terminate these
to the shield ground.
11. Verify that all cable entries are properly sealed in the cable gland or cord grip housing to prevent damage from rain,
corrosive vapors, or gases. For explosion-proof or flame-proof housing installations, plug unused openings with a sealing
plug that has been certified for explosion protection.
12. Replace the housing cover and follow the instructions in section 5.2.2, Securing the housing cover, to secure the
transmitter.
32 | 266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB
NOTE: Wiring shown outsid e of tra nsmitte r cable en try ports for clari ty
Bus +
Bus -
Shie ld wire
Power +
Power -
Shield
BLK
BLK
WHT
WHT
Cable from RTD pro be
3 Installation