Basic Installation and Operation Guide VMX Series Digital Solid State Soft Starters 18 – 1000A
Page 15 of 27
Output (Auxiliary) Relay Contacts
Dry relay output contacts from three programmable auxiliary relays are available on TB2. Outputs #1 and #2 are
Form C (SPDT), with a Common, N.O. and N.C. Output #3 is a Form A, (SPST), N.O. contact. Motortronics
recommends fusing all contacts with external fuses.
The relays are rated for 240 VAC, 5 A and 1200 VA.
Factory default settings for these relays are as follows:
AUX 1
– Run / Stop (see F060) This contact changes state upon a
Start command, returns to normal on Stop (or Begin Decel if active).
AUX 2
– At-Speed / Stop (see F061) This contact changes state upon
the
VMX Series
detecting At-Speed, and returns to normal on Stop.
At-Speed is determined by the
VMX Series
detecting the current
dropping after reaching End-of-Ramp, or a maximum of 30 seconds
after Start.
AUX 3
– Any Trip (see F062) This contact closes when any trip
condition # 5 – 15 (as defined in Table 8) occurs.
All relays can be reprogrammed for a wide variety of functions.
See Section 8 for additional relay programming details.
Note:
It is not necessary to use the programmable output auxiliary relays in the Start / Stop circuit. An
internal seal-in relay is provided elsewhere (see “Three Wire Control Connections” above).
Bypass Contactor Control
On
VMX…-BP
version (and NEMA 12 enclosed) starters, an internal dedicated connection is used at the factory
for automatically controlling the Bypass Contactor. Field wiring for Bypass Contactor operation is not required.
On units 210A and above ordered without a Bypass Contactor (-P version), the dedicated bypass control
terminals are available for customer use, or any of the above Aux. Relays can be programmed for “At-Speed”
operation.
Independent control of the bypass contactor is available for emergency use. See section 4.2.9.a of the
Advanced Installation, Operation and Programming Manual for details about how to use this feature.
K3
Internal Connections
Figure 12:
Auxiliary Relay Connections
TB-2
AUX.
RELAY #1
AUX.
RELAY #3
AUX.
RELAY #2
13 14 15 16 17 18 19 20
1
NC NO
.
C
1
A1 A2
2
NC NO
.
C
3
NO
.
C
K5
K4
Bypass Control
Terminals:
210 – 1000A without
integral bypass
Bypass Control
Terminals
18 - 160A Units
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
