Walker Magnetics SMART-D SERIES - Manual (Page 13)

O.S. WALKER Co., Inc. SMART-D Control
SMART D MANUAL DD14511L Rev. L, March 30, 2011
3-4
3.1.7 Connecting Optional Features
SMART-D chuck controls are equipped with three optional features, Current Sensing,
Part Release and Lockout. These features enable the chuck control to work with external
equipment such as machine controls or a PLC. Refer to the "Operation" section 4 of this
manual for using of these features.
3.1.8 Current Sensing
This control is equipped with a current sensing feature that monitors the current flowing
to the chuck and indicates when this current has reached a predetermined value. The
current sense relay is a “Form C” dry contact type. The connections are at J4: Pin 6 is
common, Pin 7 is the N. O. contact, and Pin 8 is the N. C. contact. The rating of the
contacts are 10 A @ 125 VAC, 5 A @ 250 VAC, and 5 A @ 30 VDC. See Figure 5-5 for
locations.
3.1.9 Part Release
The part release relay energizes and de-energizes with the chuck. It is the same type as
the current sense relay. The connections are at J4: Pin 3 is the common, Pin 4 is the N.
O., and Pin 5 is the N. C. contact. See Figure 5-5 for locations.
3.1.10 Lockout
A Lockout feature is supplied with this control, which prevents anyone from accidentally
changing the settings while machining is in progress. There are two connections for
lockout. The first is to supply 115 VAC to J4, terminals 1 and 2. The second is to sink the
positive voltage at J5, terminal 8. This is done using a dry contact connected to terminal
8 (lockout) and terminal 13 (GND) on J5*. See Figure 5-5 for locations.
* When using lock-out, JP2 jumper must be removed.
3.1.11 Energizing the System
Inspect the conduit and wire installation. Verify that all wiring connections are correct and
secure, paying particular attention to the ground connections. Thoroughly read the
"Operating Instructions" section 4 prior to energizing any equipment.
Close all breakers and disconnects upstream of the chuck control. Close the door (on
models equipped with enclosures) and put the chuck control disconnect switch in the
"ON" position. When power is first applied, the chuck control will initialize itself in the
"Release Mode". The "Release" indicator light on the remote unit will be lit and the
current sense relay open. The system is ready for operation. No power is applied to the
chuck.