Basic Installation and Operation Guide VMX Series Digital Solid State Soft Starters 18 – 1000A
Page 12 of 27
Control Connections
Control connections on the
VMX Series
starter are divided into 2 groups. With the unit oriented vertically, TB1 is
a 12 point DC terminal block (on the left), and TB2 is a 10 point AC terminal block (on the right side). These are
removable terminal blocks for ease of connection and servicing, and are provided with different spacing (pitch)
between the header pins so they are not interchangeable. Following are descriptions of control connection
points.
Figure 4: Control Terminal Blocks
Note:
Terminal numbers are shown on the side of the first and last terminal of each block. An
additional 3 point terminal on the far left side is for serial communication connections.
AC Control Power Supply Connection
Separate AC Control Power supply is required to power the electronics of the
VMX Series
starter. 120VAC is
standard, order 240 VAC (optional) if necessary for your line power supply configuration. The control voltage
must be connected to terminals marked A1 and A2 of TB-2 as shown
in figure 5 (these are also Terminal #s 21 and 22). This control
voltage must be customer supplied, unless an optional control power
transformer (see table below) has been supplied with the unit.
Control Power Requirements
When sizing a control power transformer for the
VMX…-BP Series
starter use the chart below for minimum sizes or supply capacity. Any
additional control devices powered by the same CPT must be added
to the above to ensure proper operation of the Bypass Contactor.
AC Control Power VA Requirements
VMX …-BP
Model
PC
Boards
Fans
-BP: Bypass
Contactor
Inrush
-BP: Bypass
Contactor
Sealed
Recommended
minimum
CPT
Rating
VMX-18 to 48
48
(inc. in PCB)
95
9
100
VMX-62 to 112
48
(inc. in PCB)
220
17
250
VMX-150 to 160
48
(inc. in PCB)
298
12.3
500
VMX- 210 to 276*
48
100
380
11.6
500
VMX-360 to 450*
48
150
571
14
750
VMX-550* 48
200
1000
29
1000
Table 4: VMX Series Control Power Requirements
Note: * -P versions (w/o bypass) still require PCB and fans, plus user supplied bypass (if any).
N C
JOG
RAMP2
PTC
OPTO
24VDC from internal supply
240VAC max. from
customer source
TB1: 12 terminals, #1-12
TB2: 10 Terminals, #13-22
Opto-Isolated Triac Switch
10-250VAC/DC 50mA max.
1 2 3 ............................................... 11 12 13 14 ...........................19 20
1
NC NO
.
C
1
A1 A2
2
NC NO
.
C
3
NO
.
C
= Factory installed jumpers
120VAC Control Power
(or 240VAC if ordered)
120VAC
Supply
Figure 5:
Control Pow er Supply Connection
TB-2
1
NC NO
.
C
1
A1 A2
2
NC NO
.
C
3
NO
.
C
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