812b motherboard schematic, Chematics – Detcon 812B User Manual
Page 3
Model 812B Rack Mount Control Enclosure PG.3
O
Ou
uttp
pu
uttss
Discrete Analog 4-20 mA DC
Serial RS-485 Modbus™
A
Alla
arrm
m R
Reella
ayyss
(discrete or zoned)
Contacts include common with jumper selectable choice (on controller) of normally-open or normally-closed for four alarms
Resistive load: 5A, 250 VAC; 5A, 30 VDC
Inductive load: 2A, 250 VAC; 2A, 30 VDC
Max. operating current: 5A
O
Op
peerra
attiin
ngg T
Teem
mp
peerra
attu
urree R
Ra
an
nggee
-40°F to +175°F
W
Wa
arrrra
an
nttyy
One year
1.3 S
CHEMATICS
A
B
C
D
E
F
H
J
K
L
M
N
P
R
S
T
U
V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
mA
Sensor
NO/NC
Com
Alm 3
NO/NC
Com
Alm 2
NO/NC
Com
Alm 1
NO/NC
Com
Fault
4-20mA
Out
Typical
Connector
x 8
Typical
Jumpers
x 7
CH8
CH7
P8 thru P1
Typ. x 8
Alarm
Reset
P9
L1
N
A (+)
B (–)
Shld
RS-485
VDC In
GND
VA
C
In
P10
P11
P12
P13
812B
Motherboard
Schematic
L1
N
GND
+ In
– In
+ Out
– Out