Omega RD100B - Manual (Page 52)

2-8
Measuring Input Wiring
– –
DC voltage
1-5V
ON/OFF
Extension leadwire
DC current
Shunt resistor
–/B b +/A –/B b +/A
–/B b +/A –/B b +/A
+ +
Thermocouple input Resistance temperature detector input
DC voltage input, 1-5V input,
and ON/OFF input DC current input
Leadwire resistance:
10
Ω max./wire. The resistance
of the three wires should be
equal.
Example: For a 4 to 20 mA
input, a shunt resistor of
250
Ω ± 0.1% can be used to
convert to 1-5V input.
A
B
b
Note
RTD input terminals A and B on the dot model are isolated on each channel. Terminal b is
shorted internally across all channels. However, for 3 legs isolated RTDs (/N2 option), input b
is also isolated for each channel.
2.3 Input Signal Wiring