KB Electronics KBAC-48 - Manual (Page 27)

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APPENDIX A – OPTIONAL SIAC SIGNAL ISOLATOR (PART NO. 9600)
See SIAC Installation Instructions (Part No. A40149) for details and connections.
Description
The SIAC provides an isolated interface between non-isolated signal sources and the drive. It is used with
the KBAC Series drives to isolate, amplify, and condition DC voltage and current signals from any source
(tach-generators, transducers, PLCs, and potentiometers). It also provides an isolated input to control
motor direction and an isolated +5 Volt power supply for transducer or potentiometer operation. All input
connections are isolated from the AC line and motor wiring. The SIAC installs easily in the KBAC with a snap-in
mounting base and is wired with a connector.
The main features of the SIAC include voltage or current signal inputs. Other features include a power on
LED, a barrier terminal block to facilitate wiring, multi-turn trimpots (SCALE (MAX), OFFSET), and a selectable
jumper for voltage or current signal input selection. An optional accessory for use with the SIAC and KBAC is
an Auto/Manual Switch (Part No. 9481) which selects a signal input from either the SIAC or the Main Speed
Potentiometer.
Table 1 – General Performance Specifications
Description Specification Factory Setting
Scale Trimpot (SCALE) Input Voltage Range (Volts DC) 0 to ±2.5 thru 0 to ±25 0 to ±5
Offset Trimpot (OFFSET) Range (% of MAX Trimpot Setting) 0 – ±50 0
Input Current Range (milliamps DC) 4 – 20 —
Forward and Reverse Input Switch Types Dry Contact or Open Collector —
+5V Power Supply Maximum Load Current Rating (milliamps DC) 25 —
Potentiometer Operation (kΩ) 5 —
Input/Output Linearity (%) 0.1 —
Thermal Drift (millivolts per °C) 0.4 —
Operating Temperature Range (°C / °F) 0 – 40 / 32 – 103 —
COM SIG1 +5V FWD REV -5V COM
IND PWR
CON1
J1
CUR
VO
LT
OFFSET
SCALE
VDC
(MAX)
TB1
TB1: Main Speed Potentiometer, Signal Input,
and Direction Switch connections.
J1: Sets the drive for operation with a voltage
or current input signal. PWR LED: Provides indication that power is applied.
IND LED: Status Indicator (flashing green).
OFFSET: Signal Offset adjustment multi-turn trimpot.
SCALE (MAX): Input voltage adjustment multi-turn trimpot.
CON1: Used to connect the SIAC to the drive.
VDC: Factory use only.
PGM
J7
J7: Factory use only.
Figure 1 – SIAC Layout