Cleveland Motion Controls DIN Rail Amplifier MWI-13261 Ultra Series Isolated REV BA - Manual (Page 14)

DIN R AIL A MPLIFIER , MWI-13261 U LTRA S ERIES MAN-13261 U LTRA R EV BA
2.9 G
AIN
S
ELECT
S
WITCHES
The group of jumper-switches that control the fixed gain of the Instrumentation Amplifiers (IA) are located close to
the front left edge of the Input card. (Refer to Figure 4) Typically, you configure both channels to the same setting if
both transducers are the same force rating.
When the amplifier is held horizontally with the pluggable connectors facing toward the right (refer to Figure 4), the
leftmost cluster of jumper switches, (J10, J9, J7) sets the gain for the LCH (Left Channel) Instrumentation
Amplifier. Similarly, the right cluster of jumper switches, (J6, J5 and J4) sets the gain for the RCH (Right Channel)
Instrumentation Amplifier. The lowest gain (Av = 8) occurs when all of the switches are in the 1-2 position. As
switches are moved “away” (into position 2-3) from left to right, the gain progressively increases as described in
following table:
Left Channel
J10 J9 J7
Voltage Gain
Right Channel
J6 J5 J4
1-2 1-2 1-2 5 1-2 1-2 1-2
2-3 1-2 1-2 25 2-3 1-2 1-2
2-3 2-3 1-2 125 2-3 2-3 1-2
2-3 2-3 2-3 620 2-3 2-3 2-3
When changing the internal jumper-switch settings, it is always advisable to change the settings
with the 24 VDC power removed. If this is not possible, it becomes particularly important to use
a non-conductive tool to alter switch positions.
Make sure that jumper-switch settings are fully in position to avoid accidentally leaving a switch in an “in-
between” state.
The total gain range of the amplifier is the product of the IA and summing amplifier gains (variable).
Using the lowest gain switch settings, the net gain is 5 x (.9 to 9.0 ) or 4.5 to 45
With the other gain combinations available, a 10 volt output can be produced with input voltages ranging from
between 0.002 to 0.50 volts.
2.10 M
ETER
V
OLTAGE
/C
URRENT
C
ONFIGURATION
The damped output for a tension indicator can be configured as either a +/- 2V output or a +/- 1mA output by
changing the position of jumper-switch J1 located on the Output Card (Refer to Figure 4 for location). Voltage
output is selected by setting J2 to the (1-2) position. Current output is selected when J2 is set to the (2-3) position.
Note that different wiring terminals are employed for the signal return when configured for current or voltage.
2.11 M ETER O UTPUT D AMPING S ELECT
The amount of damping for the meter output (intended to drive a tension indicator) can be configured by the position
of jumper-switch J2 on the Output card (refer to Figure 4 for location information). Setting the jumper switch to J2
(1-2) sets the break frequency at 0.3 Hz. Setting the jumper switch to J2 (2-3), the break frequency setting is raised
to 3.7 Hz
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