Heath Consultants Heath Data Recorder (HDR) - Manual (Page 6)

6
HDR PCB LAYOUT
C
T
S
R
T
S
CD T
X
M
RXM G
N
D
G
N
D
P
U
L
S
E
I
NP
UT
G
N
D
TXD RXD P
U
L
S
E
O
UT
B
G
N
D
P
U
L
S
E
O
UT
A
G
N
D
P
3
+
E
P
3
+
S
P3
-
E
P3
-
S
GND P2
+E
P2
+S
P2
-
E
P2
-
S
GND P1
+E
P1
+S
P1
-
E
P1
-
S
GND GND GAS
T
EM
P
GND
INDEX B
STOBE
INDEX A
STOBE
3V SYS
GND
GAS TEMP 2
1.5VDC
GND
12VDC
GND
BUTTON
COM 2 COM 1 PRESS 3 PRESS 2 PRESS 1
JP5*
CR2032
3V
1 2 3
ASSY#: 77R65-9320
REV F
3.6V "AA" Lithium
OPEN
JP1*
INDEX INPUT
MAIN
BATT
CONN
12VDC
EXT
CONN
DISPLAY
BACKUP BATTERY
BACKUP
BATTERY
MEMORY
(HVC ONLY)
GAS TEMP
PROBE #2
PROBE #1
DATA
MODEM DIRECT
WIRED TO
J13 J14 J11 J10 J7 J6 J5 J9
J8
J12
J1
J11
J2
NOTE: External connections to the pcboard should be made by acquiring locking harnesses for Modem
connections (J13) and External 12V power (J11), Pulse input (J14) & (2) Pulse outputs (J10).
Contact Heath Consultants customer service to get these harnesses.
* JP1: This jumper switches the lithium power from the pcboard circuit.
* JP5: When using the internal 2400 baud modem, a special harness is required for “Call out upon alarm”
feature. This harness connects Pin 2 of JP5 to Pin 6 of J13 (External modems that stay online 100%
doesn’t require this option).