Instruction Manual

20
The time proportioning output is turned on for a percentage of the ANAFAZE 8 PID
cycle time according to the calculated control output. Thus if the calculation calls for
20% output and the cycle time is 5 seconds the output will be on for 1 second and then
off for 4 seconds.
5.2 ON/OFF VOLTAGE
The on/off voltage board provides the same voltage output as the time
proportioning voltage board except the cycle time is not used. If any level of
control output is called for by the PID calculation, the output will be turned on
and remain on until the calculated control output is zero.
5.3 ANALOG OUTPUT -- VOLTAGE OR CURRENT
Analog output boards can be configured for current (ma) or voltage ( up to 10v )
outputs. The plus side of the output is terminal "A" and the negative side is
terminal "B" for each loop. Maximum loop impedance is 500 ohms. Units are
shipped configured as ordered. To change the configuration of an analog output
card, carefully remove the card from the card cage and change as follows:
For 4 to 20ma: J1 in, J2 in, remove R15
For 0 to 16ma: J1 in, J2 out, remove R15
For 0 to 10ma: J1 out, J2 out, remove R15
For 0 to 10v : No jumpers, R15 = 1k
For 0 to 5v : No jumpers, R15 = 499ohms
[use 1% metal film resistors]
5.4 ISOLATED ANALOG OUTPUT -- VOLTAGE OR CURRENT
The isolated analog output can be configured as above for voltage or current. To
maintain isolation an external loop supply is required. The supply should be
between 15VDC and 20VDC and is connected to screw terminals J2. The middle
terminal is connected to the plus on the power supply, and the terminal adjacent to
the J2 label is connected to the power supply minus.
5.5 DIGITAL INPUT
One digital input is provided for logic inputs that can be read from the computer.
Connect signal to "IN" pin and signal return to "GND"
ON < 0.5V
OFF > 3.5V
2MA sink current
5.6 DIGITAL OUTPUTS
Two digital outputs are provided which can be set from the computer. Each output is an
open collector transistor which is turned on when the output is set to "ON". The status of
the outputs can be checked by the computer.