Endress+Hauser SpectraSensors SS2100r, Hardware Manual

Page: 29 / 60

Installation
Hardware Manual 2
–
3
To connect electrical power to the analyzer:
1. Access the back panel of the enclosure.
2. Confirm that the power switch is turned off.
3. Plug the female end of the power cord into the power input module.
4. Plug the male end of the power cord into an appropriate outlet.
Connecting the signals and alarms
The 4-20 mA current loop, serial output and alarm outputs are accessed via
female 9-pin D-sub connectors on the back panel of the analyzer, as shown in
Figure 1–5.
The relay for the Assignable Alarm is configured by default to be the normally
de-energized Concentra Low Alarm with the dry contact changing state on
alarm. Refer to “DO Alarm Setup” in the Firmware Manual to change the
Assignable Alarm configuration.
The Assignable Alarm output can be wired for OPEN or CLOSED depending
on which terminals are used normally open (NO) or normally closed (NC).
The relay for the
General Fault Alarm is configured to be fail-safe (or
normally energized) so the dry contact will open in the event of power loss or
General Fault Alarm . Thus, the cables for each General Fault Alarm should
be wired to the common and NO terminals.
To connect the signal and alarm cables:
1. Prepare cables with male 9-pin D-sub connectors for the RS-232,
4-20 mA loop and alarms according to the pin assignments listed in
Table 2–1. Use shielded cables for the RS-232 and 4-20 mA loop.
Hazardous voltage and risk of electric shock. Failure to
properly ground the analyzer may create a high-voltage shock
hazard.
The 4-20 mA current loop output is factory set to source current.
To change the 4-20 mA current loop output from source to sink,
refer to “To change the 4-20 mA board from source to sink”
on page 2-5.
Be sure power to the analyzer is turned off before opening the
electronics (left side) enclosure and making any connections.