Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 41)

Getting Started Model 9110TH NOx Analyzer
Teledyne Analytical Instruments 21
3.4.7. CONNECTING THE ALARM RELAY OPTION (OPT 61)
The 9110TH/M can be equipped with a set of 2 concentration alarms. Each alarm can
be independently enabled or disabled as well as programmed with its own, individual
alarm limit point (see Section 4.14 for details on programming the alarms).
The status of each alarm is available via a set of alarm relay outputs located on the lower
right hand corner of the analyzer’s rear panel (see Figure 3-4). While there are four
relay outputs on the back of the analyzer, only Two of the outputs correspond to the
instrument’s two concentration alarms.
Table 5-5: Alarm Relay Output Assignments
RELAY NAME AL1 AL2 AL3 AL4
ASSIGNED ALARM ST_SYSTEM_OK2 1
CONCENTRATION
ALARM 1
CONCENTRATION
ALARM 2
SPARE
1 ST_SYSTEM OK2 is a second system OK status alarm available on some analyzers.
ALARM OUT
AL1 AL2 AL3 AL4
NO C NC NO C NC NO C NC NO C NC
ST_SYSTEM_OK2
(Optional Alert)
CONCENTRATION
ALARM 1
CONCENTRATION
ALARM 2
SPARE
Figure 3-11: Alarm Relay Output Pin Assignments
Each of the two concentration relay outputs has 3-pin connections that allow the relay to
be connected for either normally open or normally closed operation. Table 3-7 describes
how to connect the alarm relays.