11
9900 Transmitter
DC Power
Loop V
oltage
3-9900.395
H COMM Module
Connect power and open
collector wires here as
shown on pages 17 and 18.
Connect sensor wires here as
shown in the following
fi
gures.
Sensor model
Freq
Output
Digital (S
3
L)
Output
Run on
Loop Power
9900 Generation
I
II
III
IV
515/8510
X
X
X
X
X
X
525
X
X
X
X
X
X
2000
X
X
X
X
X
2100
X
X
X
X
X
2250
X
X
X
X
X
X
2350
X
X
X
X
X
X
2450
X
X
X
X
X
X
2507
X
X
X
X
X
2536/8512
X
X
X
X
X
X
2537-5
X
X
X
X
X
2540
X
X
X
X
X
X
2551
X
X
X
X
X
X
2552
X
X
X
X
X
X
2610-41
X
X
X
2610 + 8058
X
X
X
X
X
2724-2726
X
X
X
X
X
2734-2736
X
X
X
X
X
2750
X
X*
X
X
X
X
2751
X
X
X
X
X
2756-2757
X
X
X
X
X
2764-2767
X
X
X
X
X
2774-2777
X
X
X
X
X
2819-2823
X
X
X
X
X
2839-2842
X
X
X
X
X
2850
X
X
X
X
X
4150 + 8058
X
X
X
X
X
U1000
X
X
X
X
X
* A minimum of 24 VDC Loop Power is required for the 2750.
Loop powered systems
cannot power both an
H COMM Module and
pH sensor.
If using both an H COMM
Module and pH sensor,
DC power is required.
Loop Power can be
used ONLY for the
following sensors:
515/8510, 525,
2250, 2350, 2450,
2536/8512, 2540, 8058
and pH/ORP sensors
with 2750; all other
measurement sensors
require DC power.
Sensor Wiring
Advanced 2751
features require
Gen 4 or greater