Oldham MX 52, Руководство по установке

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The current commercial designations are as follows:
- model 20/20 U - analog - type UV - 752002 (sensitive to UV radiation)
- model 20/20 UC - analog - type UV (sensitive to UV radiation)
- model 20/20 UB - µP technology - type UV - 772002 (sensitive to UV radiation)
- model 20/20 UBC - µP technology - type UV (sensitive to UV radiation)
- model 20/20 LC - analog - type UV/IR (pyroelectric, combination of UV and IR
detectors)
- model 20/20 LBC - µP technology - type UV/IR (pyroelectric, combination of UV
and IR detectors)
- model 20/20 I - µP technology - triple IR detector - 780002 (pyroelectric, sensitive
to IR radiation)
These detectors are equipped with various types of terminal block (see table below).
Model 20/20 U 20/20 UC 20/20 UB 20/20 LC 20/20 UNC 20/20 LBC 20/20 I
Type
of terminal
block
B C A C C C A
- Resistance of cable / unit
- In the case of local 24 V DC power supply : 8.5 ohms maximum per wire, i.e. 17
ohms in loop
- In the case of power supply via the MX48 unit : 3 ohms maximum per wire, i.e. 6
ohms* in loop

4 ohms for detector 20/20 I (IR3)
- Connection on MX52 unit (ONE detector per measuring channel ONLY):
- detector equipped with a terminal block of type A: see Fig. 13
- detector equipped with a terminal block of type B: see Fig. 14
- detector equipped with a terminal block of type C: see Fig. 15
Example of the utilization of the 4-20 mA signal from flame detectors equipped with
connectors of type A or C: see Fig. 16.
Example of the utilization of detectors equipped with connectors of either type A or type B
and with auxiliary power supply. The auxiliary power supply must be able to supply power to
the number of detectors planned in the measuring loop (see Fig. 17).
REMARK
In the case of this application, the maximum of 3 flame detectors can be connected in the
measuring loop.
Example of the utilization of IR3 or UV/IR detectors equipped with connectors of type A with
a local junction box and galvanic insulation (see Fig. 18).