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Status and Control Lead Connection
Status and Control
Lead Connections
Figure 3
Pin-out of
Sub-D Plug X2
Temperature Alarm
Version with Two
Solenoid Valves
Internal Control
External Control
42/23-52 EN Rev. 2
CAUTION!
Follow local regulations on installing and connecting electrical wiring.
The general status alarm for signaling temperatures outside the permitted range
and the facility for connecting the solenoid valves externally are provided at the
9-pin sub-D plug on the rear side of the converter housing (see Fig. 3).
Correct functioning of the converter is only guaranteed when the sub-D plug X2 is
mounted.
Bypass
Catalyzer
Catalyst
1
2
6
Contacts 5 and 9 are provided in the sub-D plug to ensure sure signaling of tem-
peratures outside the permitted range. This involves a potential-free make-contact
element with a switch rating of 24 V, 1 A. The alarm is signaled if temperatures
exceed the permitted temperature range by ±5 °C.
As an option the converter has two solenoid valves for switching between sample
gas paths. The valves can be controlled either internally or externally by the
customer.
If the converter is controlled internally, the bridge between contacts 1 and 6 in the
sub-D plug is absolutely necessary.
External switching is carried out by the customer using potential-free contacts. If
the converter is controlled externally, the bridge between contacts 1 and 6 in the
sub-D plug must be removed
With external control the switch on the front plate is out of function. The chosen
gas way is indicated by the two LED's.
SCC-K NO
/ NO Converter Operator's Manual
2
Internal control
External control
3
4
5
7
8
9
General status alarm:
Make-contact element,
potential-free
Switch rating: 24 V, 1 A
9
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