User Manual – Rev AJ California Instruments
Output Terminal Blocks
The MX30-3, MX30-3Pi, MX45-3 and MX45-3Pi have two output terminal blocks, TB1A and
TB1B. The MX45-1 only has one output terminal block, TB1B. The terminal blocks are large
enough to accommodate the recommended wire gauge sizes shown in Table 3-2. The terminal
blocks are located in the lower right corner on the front of the unit. The front panel needs to be
removed to access these terminal blocks.
CAUTION: REMOVE ALL INPUT POWER TO THE MX BEFORE REMOVING
THE FRONT PANEL.
The correct standard size Allen wrenches for connecting output wiring to TB1A and/or TB1B are
supplied with each MX in the ship kit. Look for a brown envelope. If the correct tools cannot be
found, contact California Instruments customer service at
support@calinst.com .
Terminal block TB1B always provides the output neutral connection, regardless of the phase
mode (1 or 3 phase output mode).
In single-phase mode, phase A output is provided through terminal 1 of TB1B.
In three-phase mode, phase A, B and C outputs are provided trough terminals 1, 2 and 3 of
TB1A respectively.
Connector Terminal Mode Output
TB1A 1 3 Phase Phase A
2 3 Phase Phase B
3 3 Phase Phase C
TB1B 1 1 Phase Phase A
2 1 and 3 Phase Neutral
Table 3-3: Output Terminal connections.
Figure 3-6: Location of Output Terminals (Front view)
44 MX Series
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