
MX4428 MXP Engineering / Technical Manual
Document: LT0273
Device Information and Programming
Page 3-34
24 March 2006
Issue 1.5
For the MIM801 the default value of 15 selects normally closed operation with interrupt on
alarm (e.g. for New Zealand callpoints). Setting the mode to 13 disables interrupt on alarm
(e.g. for heat circuits or other non-immediate alarm conditions). Setting the mode to 12
enables normally open operation and then changing
parameter 5
to 40 enables short circuit
fault detection.
Normally Open
Parameter Description
Default
4 No
interrupt
Mode
6 Interrupt
4
P0
Normal to alarm threshold
122
P1
Normal to o/c threshold
50
Alarm to s/c threshold
0
No alarm resistor
P2
176
100 ohm alarm resistor
0
P3
P4
P5
P6
Normally Closed
Parameter Description
Default
Mode
Change to 5 to select normally closed operation
4
P0
Normal to s/c threshold
122
P1
Normal to alarm threshold
50
P2
P3
P4
P5
P6
3.16.5 MX4428
PROGRAMMING OPTIONS - MIM801
Normally Open
Parameter Description
Default
Mode
Change to 12 to select normally open operation
15
P0
P1
P2
P3
Normal to alarm threshold
110
P4
Normal to o/c threshold
170
Alarm to s/c threshold
0
No alarm resistor
P5
40
100 ohm alarm resistor
0
P5
P6
Normally Closed
Parameter Description
Default
Value Description
13 No
interrupt
Mode
15
Interrupt, does not use AVF even if enabled
15
P0
P1
P2
P3
Normal to s/c threshold
110
P4
Normal to alarm threshold
170
P5
P6