Kaman digiVIT - Manual (Page 21)

www.kamansensors.com PART NO: 860525-001
Last Revised 9/16/2013
- 21 -
PART 7 – OTHER FEATURES
7.1 Limits & Relay
The digiVIT contains a solid state relay connected to pins 9 and 10 of the terminal block. This
relay has a 40 ohm closed impedance and is rated for 60V and 100mA. The relay is controlled
by the limit settings and is set up as a window comparator. The hi and lo limits, polarity (NC or
NO), and hysteresis are setup using the UDP commands. By default the relay will be on if the
output is less than 10% or greater than 90% and off otherwise.
To set the limits and relay, the digiVIT must be connected by an Ethernet cable to a PC running
console software. Reference PART 5 of this manual.
The output from the system is from 0 to 100,000 where 100,000 is 100%. The relay is setup the
same way.
For example, a command of SCLL 20000 sets the low limit to 20%.
S(R)CLP x USER X = polarity Polarity SET(READ) Limit Polarity 0 = NO 1= NC
S(R)CLH xxxx USER xx = Hi Limit Hi Limit SET(READ) Limit Hi (Signed Long Int)
S(R)CLL xxxxx USER xx = Lo Limit Lo Limit SET(READ) Limit LO (Signed Long Int)
S(R)CLD xxxx USER xx = Hysteresis Hysteresis SET(READ) Limit Deadband (Hysteresis)
(Signed Long Int)
Table 2 Relay Commands
7.2 IO bit/AUTOZERO
The IO bit (pin 8) is set up to have the same functionality as zeroing the system from the
console or the front panel menu. The system will zero the output when pin 8 is grounded and
will function normally when it is open. This means if the system is setup for bipolar voltages it
will go to 50% when grounded and 0% for unipolar voltage settings.
Note: this does not move the effective range of the system as it is only offsetting the output
reading. If the sensor is physically at 5% of the range and is zeroed, the bipolar output setting
the output will read 50% but then the linear range will then be 45% to 145%.