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SYSTEM-10 BTU METER
ONICON Incorporated 727.447.6140
Page 19 onicon.com
Make connections on the mother board, located in the enclosure, at terminal strips T3, T4 and T5. Do not exceed 4.5 in-lb
(0.5 Nm) of torque when tightening.
* Reference (Black)
* Reference (Black)
* Signal (Red)
* Signal (Red)
* Shield
Temperature Inputs
Supply Temperature
Sensor
Return Temperature
Sensor
BTU METER OUTPUTS
BTU CONTACT OUTPUT
MODE L
BTU CONTACT OUTPUT
MODE 2
MODE STATUS
SUPPLY TEMP
ANALOG OUTPUT
RETURN TEMP
ANALOG OUTPUT
BTU RATE
ANALOG OUTPUT
DELTA T
ANALOG OUTPUT
FLOW RATE
ANALOG OUTPUT
ALARM
OUTPUT
T1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
T3
1
2
3
4
5
T4
1
2
3
4
5
6
7
8
9
10
11
12
13
T5
1
2
3
4
5
6
H2
1
5
10
15
20
25
30
35
40
45
RUN
TEST
60 HZ
LED1
FLOW
INDICATOR
S1
ONICON, INC.
2DO36 Rev. D
20075-50 Rev. A
TEMPERATURE INPUTS
SIGNAL
REFERENCE
SIGNAL
REFERENCE
SHIELDS
RETURN SUPPL
Y
FLOW METER INPUTS
24 VDC
SUPPLY COMMON -
SHIELD
4-20 mA +
4-20 mA -
FRE
FREQUENCY -
DIR
DIRECTION -
ALARM +
ALARM -
TOP TURBINE
BOTTOM TURBINE
AUXILIARY FLOW METER SIGNALS
4-20 mA +
0-10 VDC +
ANALOG COMMON -
ISOLATED ANALOG COMMON -
SCALED -
D1
D2
D3
D4
VAR1
F1
J1
5
60HZ
1
J2-1
+15
+24
G
G
10
R7
H3
R1
LED1
H2
1
L / B AMP
TBL
15 V PULSE
+ -
T3
1
2
3
4
5
L1 N
Not Used
CAUTION
Shield connections are required for proper operation. Failure to use shielded cable may result in erratic operation.
3.3.2 Input Signal Connections
3.3.2.1 Input Signal Connections from Temperature Sensors