3.2 Current Output Units
Current output model 206 are true 2-wire, 4-20 mA current output devices and deliver rated
current into an external load of 0-800 Ω. Cable termination models have a 2-wire cable where
red is positive and black is negative. On the Hirschmann connector, pin 1 is positive; pin 2 is
negative and pin 4 is the ground/shield. Terminal block units have outputs label + for positive
and – for negative, the center terminal may be used for shielding.
NOTE:
All 4-20 mA current output units are designed to have current flow in one direction only- PLEASE
OBSERVE POLARITY. We suggest that the electrical cable shield be connected to the system’s
loop circuit ground to improve electrical noise rejection.
4.0 Calibration
Every model 206 is factory calibrated and should require no field adjustment. Whenever possible,
any zero and/or span offsets should be corrected by software adjustments in the user’s control
system. However, both zero and span adjustments are accessible by removing the pan head
screws and turning the zero and span potentiometer screws inside. Pan Head screws should
be replaced after adjustment to maintain enclosure rating.
Voltage output units are factory calibrated into a 50 KΩ load. Voltage units are operable into a
5000 Ω load or greater. The zero factory setting is ±50 mV.
Current outputs units (4-20 mA) are factory calibrated with a 24 VDC loop to supply voltage
and a 250 Ω load. The zero factory setting is ±0.08 mA. The span (full scale) factory settings
is ±0.16 mA. Zero and span adjustment are approximately ±1.0 mA.
