Rockwell Automation 160 SSC Series C FRN 7.xx - Manual (Page 21)

Installation and Wiring 2-9
Control Wiring
Requirements
• Run all signal wiring in either a shielded cable or separate metal conduit.
• Connect shield wire only at TB3 Common terminals (3 and 7).
• Do not exceed control wiring length of 15 meters (50 feet). Control signal cable
length is highly dependent on electrical environment and installation practices.
To improve noise immunity, the control terminal block Common must be
connected to ground terminal/protective earth.
• Use Belden 8760 (or equivalent) — 18 AWG (0.750 mm
2
), twisted pair,
shielded or 3 conductor.
Specifications
Control Terminal Block TB3 Wiring Specifications Table 2.G
Important Precautions
Terminal Block Max./Min. Wire Size
mm
2
(AWG)
Max./Min. Torque
Nm (lb.-in.)
TB3 2.5 – 0.5 (14 – 22) 0.8 – 0.4 (8 – 4)
ATTENTION: The drive is supplied with an internal 12V supply.
Dry contact or open collector inputs are required for discrete control
inputs. If an external voltage is applied, component damage could
occur.
ATTENTION: The drive start/stop and enable control circuitry
includes solid-state components. If hazards due to accidental contact
with moving machinery or unintentional flow of liquid, gas or solids
exist, an additional hardwired stop circuit is required to remove AC
input power to the drive. When AC input power is removed, there will
be a loss of inherent regenerative braking effect and the motor will
coast to a stop. An auxiliary braking method may be required.
56
7
8
NO!
External
Power
Supply
TB3