KB Electronics SIAC User Manual
"The Right Control for Your Application" 12095 NW 39 Street, Coral Springs, FL 33065-2516
Telephone: 954-346-4900; Fax: 954-346-3377
KB Electronics, Inc. www.kbelectronics.com
SIAC 2G Signal Isolator (Part No. 9600) Installation Instructions
The SIAC 2G Signal Isolator is Designed to be Used with the Following 2G KBAC Series Drives
KBAC-24D (Part Nos. 9987G* & 9988G*), KBAC-27D (Part Nos. 9520G* & 9521G*),
KBAC-29 (Part Nos. 9528 & 9529), KBAC-45 (Part Nos. 9530 & 9531), KBAC-48 (Part Nos. 9540 & 9541)
*The software revision code is printed on the bottom right side of the 2.5" X 7/8" silver ratings label, which is located on the top of the drive.
Kit Includes: SIAC Signal Isolator, Installation Instructions, Interconnecting Ribbon Cable, and two Snap-In Mounting Bases.
1 DESCRIPTION
The SIAC Signal Isolator 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 power supply for transducer or potentiometer
operation. All input connections are isolated from the AC line and motor wiring. The SIAC installs easily into the drive 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 (MAX, OFFSET), and a selectable jumper for voltage or current signal input selection. An optional
accessory for use with the SIAC is an Auto/Manual Switch (Part No. 9481), which selects a signal input from either the SIAC or the Main
Speed Potentiometer of the drive.
2 FEATURES
▪ Isolated Switching: Provides isolation for PLC open collector or contact switching.
▪ Isolated +5V Power Supply: Used to power a transducer or to supply voltage for Main Speed Potentiometer operation.
▪ Power On LED: Provides indication that power is applied.
▪ Trimpot Adjustments (Multi-Turn): Maximum Speed (MAX) and Signal Offset (OFFSET).
▪ Signal Input Selection (Jumper J1): Selects voltage or current signal inputs.
▪ Optional Accessory: Auto/Manual Switch (Part No. 9481) selects a signal input from either the SIAC or the Main Speed Potentiometer.
▪ Easy Installation: A snap-in Mounting Base and Interconnecting Ribbon Cable are provided for easy installation into the drive.
General Performance Specifications
Parameter Specifications Factory Setting
Maximum Speed Trimpot (MAX) 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 – 45 / 32 – 113 —
SIAC Signal Isolator Layout
Table 1
Figure 1
(A40149) – Rev. D00 – 4/21/2009 Page 1 of 6
"The Right Control for Your Application" 12095 NW 39 Street, Coral Springs, FL 33065-2516
Telephone: 954-346-4900; Fax: 954-346-3377
KB Electronics, Inc. www.kbelectronics.com
SIAC 2G Signal Isolator (Part No. 9600) Installation Instructions
3 INSTALLATION INSTRUCTIONS
The SIAC Signal Isolator is designed to be installed into the drive with the snap-in mounting base. For Model KBAC-24D use the
mounting base with the shorter stand-offs (0.65" (16.5 mm)). For Models KBAC-27, 29, 45, 48 use the mounting base with the longer
stand-offs (1.60" (40.5 mm)). Figure 6, on page 3, shows the drive proor to installing the SIAC. See Figure 2, for the proper orientation of
the SIAC and the Ribbon Cable. See the Interconnecting Ribbon Cable, in Figure 3.
Note: Do not install the SIAC with Mounting Base into the drive until the Ribbon Cable is installed and routed under the Mounting Base.
3.1 Install the SIAC Signal Isolator onto the appropriate Mounting Base, as shown in Figure 2. Align the SIAC over the two PC board
supports (see Figure 7, on page 3) and gently press the SIAC onto the Mounting Base until the PC board is secured into place.
3.2 Install the end of the Ribbon Cable labelled "KBAC" onto CON1 of the drive. Orient the Ribbon Cable key as shown in Figure 4.
3.3 Install the end of the Ribbon Cable labelled "SIAC" onto CON1 on the SIAC. Orient the Ribbon Cable key, as shown in Figure 5.
3.4 Rotate the assembly (SIAC with Mounting Base and Ribbon Cable) horizontally 180°. The Ribbon Cable must be routed under the
Mounting Base. Align the four snap-ins, at the bottom ends of the Mounting Base support posts, with the 4 holes located on the
drive's PC board. Firmly push on the corners of the Mounting Base until all four snap-ins are secured into place. See Figures 6 and
7, on page 3.
Figure 2
Mounting Bases
Note: Dimensions are shown in Inches/mm.
Figure 4
Mating Ribbon Cable to CON1 on the Drive
Figure 3
Interconnecting Ribbon Cable
Figure 5
Mating Ribbon Cable to CON1 on the SIAC
(A40149) – Rev. D00 – 4/21/2009 Page 2 of 6
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