Hardware Configurations; Fault Circuitry (Jp1) (Rev A Only); Marker Pulse Jumper (Jp4); Reset Circuitry (Jp5) - Aerotech MXH Series Option Manual

MXH Multiplier Option Manual Description and Configuration
1.4.

Hardware Configurations

The amplified input signals at Test Points TP9 and TP10 (Refer to Figure 1-6 for
locations) should be configured for normal 3.8 V peak-to-peak signals, see the
explanation in Section 1.3. However, the multiplier board has an acceptable range of
amplified input signals from 2V peak-to-peak to 4V peak-to-peak.
The following sections discuss the hardware used to configure the MXH multiplier board.
The hardware is accessible by removing two screws securing the dust cover to the board.

1.4.1. Fault Circuitry (JP1) (Rev A Only)

The fault circuitry detects input signal magnitudes below 0.5 Volt peak-to-peak. If a fault
is detected, all outputs are set to a high impedance state. Fault detection is enabled with
jumper JP1 in. Removing JP1 defeats fault detection. For jumper location, refer to
Figure 1-6.

1.4.2. Marker Pulse Jumper (JP4)

The marker pulse jumper in the default setting of JP4 sets the pulse width to the minimum
pulse width. In this case, the marker is one output pulse wide and is qualified with the
input marker. When JP4 is out, the marker signal of the encoder is an output and is the
same width as the input pulse and no qualification is performed. For jumper location,
refer to Figure 1-6.

1.4.3. Reset Circuitry (JP5)

The default setting (jumper in) of the reset circuitry jumper (JP5) resets the board if a
fault is detected. The faults that can occur are a loss of 5V, loss of clock signal, and low
input signal magnitudes.
Aerotech, Inc.
Version 1.6 1-7
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