The Sapling Company, Inc.
1633 Republic Road
Huntingdon Valley, PA 19006
215.322.6063 P.
215.322.8498 F.
www.sapling-inc.com
4
Operating Instructions
1. Connect external power to terminal blocks 5 and 7. Pin 6 is ground.
2. Connect RS485 input communication to terminal blocks to pins 1 and 2.
3. Connect output for 2-wire system to terminal blocks 3 & 4 (terminal blocks 10 & 11 are not used). Each pair will drive a certain number of clocks
totaling up to 5.5 amps.
4. When the box is connected to power (terminal blocks 5,6 and 7) and communication (terminal blocks 1 and 2) LEDs L2 and L3 will flicker. LED L2
will light up first and will remain lit longer. It will dim when L3 becomes lit. This informs the technician that the device is receiving a communica-
tion signal.
5. The converter box is equipped with overload protection. In the event the device has reached maximum current output or there is a short circuit
in the output, LED L5 (marked with an ‘L’ on the PCB) will light up. To reset, push the small black button located next to the transformer and 3
capacitors.
6. The converter box also contains overheating protection. When the device reaches a certain temperature (approximately 32° C) a fan will engage
to reduce the temperature. If the converter box reaches 50° C, the entire unit will shut down. If the unit shuts down, LED L4 (marked with a ‘T’)
will light up. To reset, push the small black button located next to the transformer and 3 capacitors.
Operating and Wiring Instructions
Board Layout
