User's Manual
Table Of Contents
044-xxxxx Rev. x 2-5
Table 2-4. IIC, Power, Alarms, and Controls Connector P4 Definition
PIN SIGNAL DESCRIPTION
1 +26_FAN
26V supply to the fans; routed from 12-position HPCA
connector
2 +26_FAN_RTN
26V supply returnto the fans; routed from 12-position
HPCA connector
3 FAN_ALARM1
Alarm for one of three fans in fan assembly / AIM.
Generated by the fan assembly / AIM and sent to the
MFRM via the MCPA’s RS485 link.
4 FAN_ALARM2
Alarm for one of three fans in fan assembly / AIM.
Generated by the fan assembly / AIM and sent to the
MFRM via the MCPA’s RS485 link.
5 FAN_ALARM3
Alarm for one of three fans in fan assembly / AIM.
Generated by the fan assembly / AIM and sent to the
MFRM via the MCPA’s RS485 link.
6 AUX_ALARM+
Analog voltage signal that is generated from either an
external power combiner or an intrusion alarm
mechanism, passed to the MFRM through the RS485.
7 AUX_ALARM-
Analog voltage signal that is generated from either an
external power combiner or an intrusion alarm
mechanism, passed to the MFRM through the RS485.
8 AUX_CTRL1
Contact closure switch on the MCPA but controlled by the
MFRM software. Default status is OPEN upon power up
and CLOSED on power down conditions.
9 AUX_CTRL2
Contact closure switch on the MCPA but controlled by the
MFRM software. Default status is OPEN upon power up
and CLOSED on power down conditions.
10 +5V_AIM_RTN
5V supply return for the AIM. Comes from the HPCA via
connector P2 and routed through MCPA.
11 +5V_AIM
5
5
V
V
s
s
u
u
p
p
p
p
l
l
y
y
f
f
o
o
r
r
t
t
h
h
e
e
A
A
I
I
M
M
.
.
C
C
o
o
m
m
e
e
s
s
f
f
r
r
o
o
m
m
t
t
h
h
e
e
H
H
P
P
C
C
A
A
v
v
i
i
a
a
c
c
o
o
n
n
n
n
e
e
c
c
t
t
o
o
r
r
P
P
2
2
a
a
n
n
d
d
r
r
o
o
u
u
t
t
e
e
d
d
t
t
h
h
r
r
o
o
u
u
g
g
h
h
M
M
C
C
P
P
A
A
12 IIC_CLK+ Differential IIC clock to the fan assembly / AIM
13 IIC_CLK- Differential IIC clock to the fan assembly / AIM
14 IIC_RX_DATA+ Differential IIC receive data (from fan assembly / AIM)
15 IIC_RX_DATA- Differential IIC receive data (from fan assembly / AIM)
16 IIC_TX_DATA+ Differential IIC transmit data (to fan assembly / AIM)
17 IIC_TX_DATA- Differential IIC transmit data (to fan assembly / AIM)
18 FORCE_ON+
Routed directly from MTRM connector; turns on LEDs (in
the AIM) during power-up sequence.
19 FORCE_ON-
Routed directly from MTRM connector; turns on LEDs (in
the AIM) during power-up sequence.
20 +26V_FAN 26V supply for the fans from (HPCA) connector P2
21 +26V_FAN_RTN 26V supply return for the fans from (HPCA) connector P2
22-26 NC Not connected