GE PMD-4, PMD-3 User Manual

Specifications

Power Requirements

Voltage range:
10 to 14 VDC, 12 volts nominal
Current draw:

1.3 amps min.

3.5 amps max.
Maximum ripple:

0.5 VAC PP

Operating Temperature

Minimum: -40°F (-40°C)
Maximum: +160°F (+71°C)

Surge Protection

External air gap arrester (MDSA)

Transmitter

Track voltage:
.35 volt RMS max.
.125 volt RMS min.
Frequency stability: ± .05%
Phase stability: ± 1°

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Relay Drive

12 VDC nominal, 250 to 1000 ohms

Frequency Range

All standard motion detector channels

Dimensions
PMD-3:
Height: 14.6 in (370.8 mm)
Width: 11 in (279.4 mm)
Depth: 10.75 in (273.1 mm)
PMD-3R:
Height: 14.6 in (370.8 mm)
Width: 19.25 in (489 mm)
Depth: 10.75 in (273.1 mm)

Weight
PMD-3: 13 pounds (5.9 kg)
PMD-3R: 22 pounds (9.98 kg)

doc20050-B

GE

Transportation

The Phase Motion Detector PMD-3 monitors train approach
directions from 240 to 7,500 feet (2,286 meters), activating
warning signals at the specified pre-set distance.

The PMD-3 shares module compatibility with the
GE - Transportation HXP-3 crossing processor’s advanced
microprocessor technology. This helps improve the economy
of the PMD-3’s long-term maintenance, while its design flexibility
helps reduce total installation expense and training cost.

The PMD-3 retains all the features that made earlier PMD

models easy to set up and count on. This latest iteration

provides advanced operating functionality and recording
options. It offers enhanced rusty rail performance and is
compatible with high-current cab signals.

The PMD-3 is available in two model configurations:
The PMD-3 provides stand-alone operation for single-track
applications.
The PMD-3R is furnished with built-in redundancy for

single-track applications.

Phase Motion Detector PMD-3

Advanced Crossing Warning Activation