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connections. The terminal block shown to connect the outputs of both chassis together is provided in
the ship kit. The System Interface cable is a high density HD15 to HD15 M/F cable approximately 1.5
meters in length. (www.l-com.com, P/N CHD15MF-5). This cable connects between the male DB15
connector on the Master unit rear panel labeled TO AUXILIARY and the female DB15 connector on
the Auxiliary unit rear panel labeled TO MASTER as shown in Figure 3-7.
L N Gnd
AC Line
Master power source
Auxiliary power source
System
Interface
Cable
To
Load
Junction
Block
Equal length
output wires
Output High
Output Low
Figure 3-7: 3001iX/2 Output Wiring
3.9.1 Power Up and Power Down sequence.
A multi-box i/iX system can be turned on in either order.
Note: It is not recommended to turn off either unit without turning off the other unit and then
turning it back on. This may result in miscellaneous error messages occurring on the
unit that was not powered down. If one unit has been turned off, turn off all units first
before turning the system back on.
If a master unit is to be used by itself, it is not sufficient to just leave the auxiliary unit off while the
system interface cable remains connected. Disconnect the system interface from the back of the
master unit and then turn the unit on for stand-alone use. It is also necessary to reconfigure the
system configuration in the CONFIGURATION menu, section 4.2.9.
California Instruments 45
User Manual Compact i/iX Series
3.10 Clock and Lock Mode (-LKM/-LKS Option)
Clock and lock mode operation of two or more iX AC power sources is available only if the –LKM and
–LKS options have been installed at the factory. With these options installed, it is possible to lock an
auxiliary unit (-LKS) to a master unit (-LKM). The master unit controls the frequency. This
configuration can be used to create multiphase power systems such as split-phase or three phases.
The auxiliary unit must be set to external clock mode from the Control screen. See section 4.2.5.
Two BNC connectors are provided on the rear panel of the iX model for clock and lock mode. Both
need to be connected between the master and auxiliary unit. On the master unit (-LKM), both are
outputs. On the auxiliary unit (-LKS), both are inputs. Do not connect these BNC’s between two
master units (-LKM’s) or damage to the unit could result.
Master power source (-LKM)
Auxiliary power source (-LKS)
CLOCK
LOCK
L N Gnd
AC Line
Figure 3-8: Clock and Lock Connections
Refer to Figure 3-8 for the required connections between the –LKM and –LKS units. The example is
y. More than one auxiliary can be used to create
additional phase outputs. In this case, the BNC cables can be daisy chained using BNC T connectors.
WARNI HER.
shown for two units, one master, one auxiliar
NG: DO NOT CONNECT THE AC OUTPUTS OF THE –LKM AND –LKS UNITS TOGET
CLOCK AND LOCK OUTPUTS CANNOT BE PARALLELED TO OBTAIN HIGHER
OUTPUT CURRENTS.
Do not use clock and lock mode to obtain higher power capability on the same phase(s). For high
power configurations, use the multi-chassis configuration through the system interface connection
er
ti-chassis configuration and connection information.
The frequency of the auxiliary unit will track that of the master. The output phase angle of phase 1/A
instead. Refer to section 0 for mul
will be locked to the auxiliary unit as well to within 3°. This allows split phase or multi-phase
configurations to be created.
California Instruments 46
User Manual Compact i/iX Series
3.10.1 Configuration settings
Units configured with the –LKM option will show the Clock as INT (internal) and the mode a
CLK/LOC on the CONTROL screen. Units configured with the –LKS option can be set to INT (internal)
s
f
operatio
mode suitable to clock and lock system operation. See section 4.2.5 for details.
3.10.2 Frequency measurements on –LKS units
or EXT (external) clock from the CONTROL screen. The MODE setting on the CONTROL screen o
the –LKS unit determines the power on state for the clock setting. When set to STAN (Stand-alone
n), the unit powers up with INT clock. When set to CLK/LOC mode, it powers up in EXT clock
AC power source models configured with the –LKS option used in a clock and lock configuration may
not accurately measure frequency if the programmed frequency of the master unit (-LKM) is
significantly different from the frequency setting of the auxiliary unit (–LKS). Setting the –LKS
programmed frequency when it is operating as a clock and lock auxiliary does not affect its actual
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