Telos Zephyr User Manual page 49

feature.
OUTPUTS
All outputs are open- collector closures to ground, and are also active low. These will
require a pull- up resistor to function with other logic inputs. Some equipment have the
pull- ups built into their control inputs – check the device's manual to be sure. If there is
no pull- up in the interfaced equipment, you'll have to add one. An appropriate value is
2.2K•.
Current should be limited to 400ma maximum per output with total output restricted to
1 amp (200ma each output if all five will be used).
If used with a relay or LED then tie your external power source ground to pin 1 (or use
the 5 VDC power supplied on pin 8) and run this power source through your device with
a resistor in series to limit maximum current to 400ma.
The Status Output goes active low when the condition(s) selected by the Stat Out Utility
menu item are satisfied. Options are:
•
Rcv lock
•
Line 1 active
•
Line 2 active
•
Lines 1 & 2 active
•
Lines 1 or 2 active
For additional information refer to manual section 8 (Detailed Menu Reference).
GLANCE
+5V
3 0 v
Parallel logic input circuit.
m a x
Section 3 ZEPHYR AT A
49