Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 55)

Publication 900-UM007D-EN-E - January 2011
Preparations 2-17
Wiring Guidelines and Precautions
• Separate input leads and power lines in order to protect the
Bulletin 900-TC8, 900-TC16, 900-TC32, and its low voltage sensors
(e.g., thermocouple) lines from external noise.
• For 900-TC32: Use a shielded AWG24 to AWG18 (cross-sectional area
of 0.205 to 0.823 mm2) twisted-pair cable. The stripping length is
6 to 8 mm.
• We recommend using solderless lugs when wiring to the
Bulletin 900-TC8 and 900-TC16 screw terminals. However, if lugs are
not used, the controller’s screw terminals will accept two solid or
stranded wires (no mixing) between 24 (0.205 mm
2
)...14 (2.081
mm
2
)AWG. Wire strip length 5...6 mm.
• For 900-TC8 & 900-TC16: Tighten the terminal screws properly.
Tighten them to a torque 0.74…0.9 N•m (6.6…8 lb-in.) Loose screws
may cause malfunction. For 900-TC32: Tighten the terminal screws to a
torque of 0.5 N•m
• Use the type of solderless lugs referenced in Figure 2.18 for your proper
Bulletin type.
ATTENTION
!
• Do not wire unused terminals.
• Make sure to observe correct polarity when wiring the
controller terminals.
• To reduce induction noise, separate the high-voltage or
large-current power lines from other lines, and avoid
parallel or common wiring with the power lines when
you are wiring to the terminals. We recommend using
separating pipes, ducts, or shielded lines.
• Allow as much space as possible between the
Bulletin 900 Controller and devices that generate
powerful high-frequency noise (e.g., high-frequency
welders, high-frequency sewing machines) or surges.