Morgan Schaffer Calisto - Page 26

20
The analog output connector pinout has the following configuration:
PIN NO.
OUTPUT
DESCRIPTION
1
SHLD
Shield to earth ground
2
SHLD
Shield to earth ground
3
N/A
Unused
4
Moisture (H
2
O)
Positive (+)
5
Moisture (H
2
O)
Negative (-)
6
Hydrogen (H
2
)
Positive (+)
7
Hydrogen (H
2
)
Negative (-)
8
Carbon monoxide (CO)
Positive (+) (Calisto 2 only)
9
Carbon monoxide (CO)
Negative (-) (Calisto 2 only)
The analog output connections must be made in accordance with the following connector ratings:
RATING
NOMINAL VALUE/RANGE
Connection range
0.34 – 1.5 mm
2
solid/stranded
Connection range (UL/CSA)
22 – 16 AWG
Wire strip length
6.5 mm (~1/4 in.)
Wire insulation ratings
150V (300V preferred
2
),
90ºC (194ºF) or better
Flammability
VW-1 or better
Screw type
M2.0
The load resistance can be anywhere from 0 Ohm to a maximum of 500 Ohms including resistance
of the wires. The maximum length of the wires depends on the overall resistance of the load and the
acceptable noise level.
The setup of the analog outputs is done using the Calisto Access software. Refer to Figure 33:
Calisto Access Default Set-Up for more information.
Calisto/Calisto 2 features one 4-20 mA analog input that can be used to provide a reading of the
transformer oil temperature to the unit. The 4-20 mA analog input is loop-powered to +13.5 VDC
and isolated to 1500 V.
2
To preserve 1500V functional I/O isolation, 300V rated voltage is preferred.
NOTICE
The analog input can only be used with self-powered 4-20 mA devices and must not be
powered by an external source.