Endress+Hauser SS500 - Changing the 4-20 Ma Current Loop Mode

BA02191C SS2100 TDLAS H
2
S Gas Analyzer
Endress+Hauser 3-13
11. Close and tighten the H
2
S analyzer electronics enclosure cover.
12. To complete the connections, connect the other end of the current
loop wires to a current loop receiver, the external serial cable to a
serial port on your computer and the alarm cables to the appropriate
alarm monitors.
Changing the 4-20 mA Current Loop Mode
By default, the 4-20 mA current loop output is factory set to source current. In
some instances it may be necessary to change the 4-20 mA current loop output
in the field from source to sink. The work must be performed by personnel
qualified in electronics assembly.
Table 3–1 H
2
S analyzer input/output signal connections
Terminal Description D-Conn Color
1 Serial RX Pin-3 Black
2 Serial TX Pin-2 Red
3 COM Serial Ground Pin-5 Shield
4N/C
5N/C
6N/C
7 Current Loop +(1)
8 Current Loop - (1)
9 Current Loop + (2)
10 Current Loop - (2)
11 Digital Input
12 Digital Input
Changing the current loop mode may negate specific hazardous
area certifications. For more information, contact service through
“Service” on page B-25.
Hazardous voltage and risk of electric shock. Turn off and
lock out system power before opening the electronics enclosure
and servicing.