
2-20 Installation
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Control Terminal Designations As shown in Figure 2.10, the SMC-Flex controller contains 24 control
terminals on the front of the controller.
Figure 2.10 – SMC-Flex Controller Control Terminals
Terminal
Number
Description
Terminal
Number
Description
11 Control Power Input 23 PTC Input :
12 Control Power Common 24 PTC Input :
13 Control Enable Input : 25 Tach Input ( - )
14 Control Module Ground 26 Tach Input ( + )
15 Option Input #2 : 27 Ground Fault Transformer Input :
16 Option Input #1 : 28 Ground Fault Transformer Input :
17 Start Input : 29 Fault Contact (N.O./N.C.) ➍
18 Stop Input : 30 Fault Contact (N.O./N.C.) ➍
19 N.O. Aux. Contact #1 (Up-to-Speed) ; ➍ 31 Alarm Contact (N.O./N.C.) ➍
20 N.O. Aux. Contact #1 (Up-to-Speed) ; ➍ 32 Alarm Contact (N.O./N.C.) ➍
21 Not Used 33 Aux. Contact #2 (Normal) (N.O./N.C.) ➌➍
22 Not Used 34 Aux. Contact #2 (Normal) (N.O./N.C.) ➌➍
: Do not connect any additional loads to these terminals. These “parasitic” loads may cause problems with operation,
which may result in false starting and stopping.
; Aux. Contact #1 is always programmed for Up-to-Speed to control the bypass contactor in MV applications.
➌ Aux. Contact #2 is always programmed for “Normal” indication in MV applications.
➍ RC snubbers are required on inductive loads connected to auxiliary.
Note: The OFF state leakage current for a solid-state device connected to an SMC-Flex input must be less than 6 mA.
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