CTI EM2 Series, Installation And Operation Manual

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EM2
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Figure 4: Components and Troubleshooting
1
2
3
4
1) Input and Output Signal Testpoints:
These testpoints provide measurements of the in/out
4-20 mA (measured 40-200 mVdc).
2) Wiring Terminal:
Make sure wiring is correct and securely fastened into
terminals. If the entrance monitor lid is opened and
closed often, cable wires can be prone to breakage
where they connect at the wire terminals.
3) Relay:
The Form C dry contact relay is de-energized in the
normal state (continuity between C and NC), unless
Failsafe is selected from the menu. The green LED next
to the relay is in series with the relay coil, indicating
whether the relay is energized or de-energized.
4) Buzzer:
The onboard buzzer is intended to provide audible
feedback when pressing the operator interface
pushbuttons (keys). This can be turned Off in the menu.