Ormec Model 20/40 Motion Controllers

Symbol Name Description

L1, L2 Input Power Single-phase 115 or 230 VAC, +10%, -15%, 50/60 Hz, with a switch and two 10 amp

circuit breakers (one in each line). In most installations, these terminals would be

wired with 14 gauge wire. The maximum continuous input power requirement of the

Model 20/40 is 175 watts. Maximum servodrive control power for E-Series is 30 watts

per axis; S-Series is 60 watts per axis. If external fusing is required in the power feed

to the Model 20/40, 10 amp slow-blow fuses are recommended.

FG Frame Ground Connect to the enclosure chassis and earth ground, preferably with AWG 8 or larger

braid.

r, t Servodrive Single-phase 115 or 230 VAC, +10%,-15%, 50/60 Hz. This output power is

Control Power switched by the power switch and 10 amp circuit breakers in the Model 20/40. In

most installations, these terminals would be wired with 14 gauge wire.

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3.1.4 System Power Wiring & Interlocks - TB6

Both Motion Controllers provide integrated emergency stop and fault interlocks

through terminal block TB6. Also provided on TB6 are terminals for the

+24 VDC I/O power supply provided in the unit; the internal +5 VDC power

supply; and also the input connections to the I/O Power Bus.

System wiring diagrams for standard ORMEC servodrives, which include the

recommended safety and fault interlocks for a typical system, are provided in

Appendix B. The primary features of these system wiring diagrams are:

• Servomotor power, called Main Power, is switched by the Main Power

Contactor.

• For the Main Power Contactor to be enabled, both the E-Stop Pushbutton

and the No Fault Relay must be closed.

• For the No Fault Relay to be closed, three conditions must be satisfied:

1) there must be no computer diagnostic faults, including powerup

diagnostics, run-time diagnostics and the watchdog timer function;

2) there must be 24 volts applied to the ES input at TB6; and

3) there must be no drive faults from any standby or active servodrives.

• Pressing the normally-open E-Stop Reset Pushbutton as shown provides

the 24 volts to the ES input, and as long as the other conditions are

satisfied, the Model 20/40 will close the No Fault Relay contact.

• Assuming the E-Stop Pushbutton is closed, the Main Power Contactor will

be enabled, and its auxiliary contact, MP-AUX, will close maintaining the

required 24 volts at the ES input.

• If a fault occurs in the Model 20/40, or any of the servodrives which are in

Output, Torque, Velocity or Position control modes, the normally-open

No Fault Relay contact will be opened, removing Main Power by disabling

the Main Power Contactor.

There are many acceptable variations of these System Wiring Diagrams, which

can provide different features such as 24 VDC or 115 VAC operation of the

E-Stop Pushbutton; 115 or 230 VAC operation of the and Main Contactor coil

for motor power. If using a variation, it should incorporate the primary features

as described above and in Appendix B. Contact the ORMEC Service

Department with any questions you may have in this area.

Copper wire with an 80o

C temperature rating, 12 AWG maximum, is

recommended for terminal block TB6 wiring. The maximum terminal block

screw torque is 5 in-lbs.

Before applying power, refer to Test Run Preparation in Chapter 4.

3.1.5 Emergency Stop, No-Fault Interlock & I/O Power - TB6

The Emergency Stop, No-Fault Interlock, and I/O power connections are made

at a "pluggable" terminal block on the Discrete I/O board. This terminal block is

located at the lower left of the front of the unit under the removable cover. See

Appendix C-5 for a description of fuses F1-F19 on the DIO Board as well as

the ORMEC and Littelfuse part numbers.

Description

V TB6-1 I/O Power Bus The I/O Power Bus connects all terminals labelled V and C

which are distributed on the Integral Discrete I/O terminal

blocks TB2-TB5. Its purpose is to facilitate field wiring of

discrete I/O without requiring additional terminal blocks.

This connection is to the voltage side of the I/O Power Bus,

and would normally be either:

1) connected to TB6-2 if the user decides to use the

internal +24 VDC isolated power supply to provide power

to the I/O Power Bus, or

2) connected to 115 VAC if the user decides to use 115

VAC for the I/O Power Bus.

24 TB6-2 +24 VDC Power This fully isolated +24 VDC power supply rated at 2.0 A is

provided for Emergency Stop and Servodrive interlocks, as

well as user I/O.

It would normally be used to:

1) power the Emergency Stop Reset Pushbutton;

2) power +24 VDC discrete inputs for operator inputs, limit

switches, PLC interfaces, etc; and

3) power an MMI-840 Operator Interface Terminal (1/4 amp

max) if one is used.

It would not normally be used to power 24 VDC coil outputs,

and if intending to use it for this purpose, the user should

watch power requirements carefully and use noise prevention

measures such as flyback diodes across each coil.