Black Box TL553A-R3, Manual, Page: 6 / 25

TABLE OF CONTENTS
55
Contents
Chapter Page
1. Specifications ............................................................................................. 6
2. Introduction ............................................................................................... 8
2.1 Typical Synchronous Application ...................................................... 9
2.2 Typical Asynchronous Application .................................................. 11
3. The Front Panel ....................................................................................... 11
3.1 The LEDs ........................................................................................... 11
3.2 The RTS Toggle Switches ................................................................. 11
4. Jumper-Selectable Options ...................................................................... 12
4.1 Jumper W1—Tying Signal Ground to Frame Ground ................... 13
4.2 Jumper W2—RTS Delay ................................................................... 14
4.3 Jumper W3—RXD Broadcast or Gated Mode ................................. 14
4.4 Jumper W4—Priority Selection (4- and 8-Port Models Only) ........ 15
4.5 Timeout Jumpers .............................................................................. 15
5. Installation ................................................................................................ 18
6. Operation (Port Selection) ..................................................................... 20
7. Troubleshooting ...................................................................................... 22
7.1 Calling Your Supplier ....................................................................... 22
7.2 Shipping and Packaging ................................................................... 22
Appendix: Pin Descriptions ........................................................................... 23