Installation Guide

-148dBm Cold Start
-156dBm Hot Start
Location Accuracy: Up to 2.0 CEP Open Sky (24 hours static)
Anti-jamming
AGPS/Location assistance capable
Cellular Communications (Comm)
North America Variant
LTE Cat 1 - 1900 (B2)/AWS 1700 (B4)/850 (B5)/700 (B12) MHz
HSPA/UMTS - 850 (V)/1900 (II) MHz
3.2 HMU-3640™ Connectors
https://puls.calamp.com/wiki/HMU-3640_Hardware_%26_Installation_Guide 7/27
The HMU-3640™ offers connectors to access VBUS, I/O, other expansion capabilities. These connectors are:
12 Pin VBUS, I/F Power, I/O Mini-Deutsch Connector
Battery Applicator
SIM Card Port
HMU-3640™ PCBA Top
https://puls.calamp.com/wiki/HMU-3640_Hardware_%26_Installation_Guide 8/27
HMU-3640™ PCBA Bottom
3.2.1 I/O Connector
The HMU-3640™'s features expanded power, VBUS and I/O capabilities via its 12-Pin DTM15-12PA connector. Its pin-out is as
follows:
*Refer to Section 2.6 (https://puls.calamp.com/wiki/Harness_Diagrams#V-Series_.28VDK-3641.29_and_HMU-3640%7C)
of the Harness
Diagrams page for more information on appropriate accessories for the HMU-3640™.
https://puls.calamp.com/wiki/HMU-3640_Hardware_%26_Installation_Guide 9/27
Pin Signal
Name Description Color
1 CAN High J1939 CAN communication
2 RS232 RTS RS232 RTS Input to HMU3640
3 RS232 TX RS232 Data Transmit from HMU3640
4 INPUT 0 Ignition Input
5 INPUT 1 Digital Input
6 VIN Main power input connected to positive terminal of vehicle battery. Operating range of 9 to 32
VDC
7 GND Main power input connected to negative terminal of vehicle battery. Operating range of 9 to 32
VDC.
8 ADC 1 Analog Input
9 OUT 0 Digital Output
10 RS232 RX RS232 Data Input to HMU3640
11 RS232 CTS RS232 CTS Output from HMU3640
12 CAN Low J1939 CAN communication
Options exist to swap in RS232 CTS, RS232 RTS, K line, or an additional general purpose input.
12 Pin Orientation
3.2.2 Accessories
*Refer to Section 2.6 (https://puls.calamp.com/wiki/Harness_Diagrams#V-Series_.28VDK-3641.29_and_HMU-3640%7C)
of the Harness
Diagrams page for more information on appropriate accessories for the HMU-3640™.
3.3 GPS Receiver
56 channel GNSS receiver (with SBAS)
Accuracy: 2.0m CEP (50%)
Tracking Sensitivity: -162dBm
https://puls.calamp.com/wiki/HMU-3640_Hardware_%26_Installation_Guide 10/27
Acquisition Sensitivity: -147dBm
3.4 I/O Descriptions
The HMU-3640™ provides the following logical mapping of inputs and outputs (I/O):
Digital Inputs
Input 0: Ignition Sense (Always biased low)
Input 1: In-1 sel Generic Digital Input (Biased high or low/ S-158 Bit 1)