RADIOMETER HOUSEKEEPING / POWER CONNECTOR

MS 16-26 ON CHASSIS

PIN#

A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
T
U
V
W
X
Y
Z
a
b
c

COLOR

Red
Brown
Orange

Yellow
Black
Black
Black
Brown
White
Red
White
Orange
White
Yellow
White

FUNCTION

+15V, POWER FOR PCB's* TO PCB'S PIN 21 (+ or - 50 mA approximately)
-15V, POWER FOR PCB's* TO PCB'S PIN 20 (+ or - 50 mA approximately)
+15V, POWER FOR WIDE BAND RADIOMETER* AMPLIFIERS (~1 Amp)
N.C.
+24V, HEATER POWER TO PCB D - 20 ONLY
0V, HEATER RETURN TO PCB D - 22 ONLY
0V, GROUND RETURN FOR RADIOMETER ELECTRONICS
0V, GROUND RETURN FOR RADIOMETER ELECTRONICS
PCB #C-3 TEMP #1 (PRE-AMP), TWISTED PAIR (J, K)
PCB #C-4 TEMP #1 GROUND RETURN, TWISTED PAIR (J, K)
PCB #C-7 TEMP #2 (DETECTOR DIODE), TWISTED PAIR (L, M)
PCB #C-8 TEMP #2 GROUND RETURN, TWISTED PAIR (L, M)
PCB #C-11 TEMP #3 (EXTERIOR AMBIENT), TWISTED PAIR (N, P)
PCB #C-12 TEMP #3 GROUND RETURN, TWISTED PAIR (N, P)
PCB #C-15 TEMP #4 (ELECTRONICS BOX), TWISTED PAIR (R, S)
PCB #C-16 TEMP #4 GROUND RETURN, TWISTED PAIR (R, S)
+ MONITOR HEATER VOLTAGE, TWISTED PAIR (T, U)
- MONITOR HEATER VOLTAGE, TWISTED PAIR (T, U)
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.

* Power common is pins G, H.
Power return for heater pins E, F is isolated from G, H but see note below.

Note: A 1K resistor is connected between common of electronics power and heater power.

Documentation by John Gibson.