© 2021 Cypress Solutions Manual: CTM-ONE (Revision 1.0)
Standby / Ignition (+V for operation, Off for standby)
A 5 Amp “slow-blow” fuse is recommended in the +V supply line.
When the operate/standby line is used, the CTM-ONE can take advantage of the state of this line using its
“ignition sense” features. When the ignition line is wired the CTM-ONE does not completely shut down, a small
amount of power is used (1.2mW-40 mW) to monitor the status of various inputs so the device can “wake on
events” that occur when the device is in low power mode.
Advantages of connecting power using the vehicle operate/standby or ignition line:
• Ignition ON/OFF events can be reported and logged.
• Shutdown based on a timer can be activated, for example, turn CTM-ONE off 10 mins after ignition has
Before any external cables are connected (GPS, Cellular RF, Wi-Fi RF, WPAN RF, serial, Ethernet, GPIO, CAN),
verify that the power cable is wired correctly on the battery side. In certain cases, reversely connected battery
input may cause damage which is not covered under warranty.
5.5 OPTIONAL - Connect External Antennas
The CTM-ONE has internal antennas but has the option to operate with external antennas in cases where
external antennas are required. Antennas vary a great deal and should be selected based on the application the
device is going to be used. All antenna connectors utilize SMA jacks with the exception of Wi-Fi/ Bluetooth
which require reverse polarity SMA (RP-SMA)
For optimum performance antennas should be mounted in a vertical orientation as high up as possible and with
clear line of sight in all directions. For regulatory purposes it must be mounted in such a position as to maintain
a separation distance from any person of at least 20cm (8”).
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