abem Terraloc Pro 2 - Page 53

ABEM Terraloc Pro 2
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External Arm Input
External arm is used when interconnecting two or more Terraloc Pro 2s using the TTL
Arm/Trig connector (Figure 73 chapter 10.2). There is no limit for how many Terraloc
Pro 2s may be connected in this way. When external arm input is on the Terraloc Pro 2
monitors the input continuously and if a correct signal is received the Terraloc Pro 2
will arm.
Note! If you have several instruments or devices connected
in a "daisy chain", you must ensure that both Arm
Input mode and Arm Out mode are properly defined
on each instrument (i.e. they must all be set to either
TTL rising edge or TTL falling edge)
External Arm/Trig Output
Use this to inform other electronic devices (seismographs, vibrators, computers, etc)
that the Terraloc Pro 2 has triggered. The signal is in TTL standard and uses the TTL
Arm/Trig connector (Figure 73 chapter 10.2)
Setting
Description
External trig
out mode
- The following modes are available:
Name
Description
TTL Rising
Edge
The instrument will make the trig-out signal go from
low to high when the instrument gets armed
TTL Falling
Edge
The instrument will make the trig-out signal go from
high to low when the instrument gets armed
External
arm out
mode
- The following modes are available:
Name
Description
TTL Rising
Edge
The instrument will make the arm-out signal go from
low to high when the instrument gets armed
TTL Falling
Edge
The instrument will make the arm-out signal go from
high to low when the instrument gets armed
External
arm input
mode
- The following modes are available:
Name
Description
Off
The TTL Arm/Trig input is not monitored
TTL Rising
Edge
The instrument is armed when the TTL signal on the
TTL Arm/Trig input goes from low to high
TTL Falling
Edge
The instrument is armed when the TTL signal on the
TTL Arm/Trig input goes from high to low