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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