Despatch Protocol 3 Controller - Manual (Page 18)

A SSEMBLY & S ETUP Protocol 3 Controller Owner’s Manual
18 Version 1.2
Copyright © 2013 by Despatch Industries.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and
retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.
4.
Assembly & Setup
Danger!
All grounding and safety equipment must be in compliance with
applicable codes, ordinances and accepted safe practices.
4.1. Install the Protocol 3 Controller
When replacing a Protocol 3 controller, follow the steps below. Tools required for installation
include ¼” socket set with #1 bit, #2 Philips screwdriver.
1.
Disconnect the power.
2. Unplug all terminals on the rear of the control, noting the proper connections (Figure 3).
3. Remove the retaining clips for the controller.
4. Remove the controller.
5. Insert the new controller into the panel.
6. Fasten the retaining clips.
7. Re-plug all terminals.
8. Secure the control panel.
4.2. Protocol 3 Controller Conversion with NO Options
To replace the older model Protocol Plus controller with the newer Protocol 3 controller, connect
terminal blocks as indicated in Table 7 and Figure 3.
Table 7. Protocol Plus to Protocol 3 Controller Conversion.
Terminal Block
Former
Protocol Plus Connections
New
Protocol 3 Connections
Three pin terminal block for
power leads
Terminals 30, 31, 32 Terminals 1, 2, 3
Five pin terminal block for
SSR and Hi-limit
Terminals 17, 18, 19, 20, 21 Terminals 26, 27, 28, 29, 30
Remove the four-pin terminal
block from thermocouples and
rewire with two three-pin
blocks. Control Thermocouple
Terminals 13, 14
Control Thermocouple
Terminals 17, 18
Hi-limit Thermocouple
Terminals 15, 16
Hi-limit Thermocouple
Terminals 32, 33
Warning!
Disconnect the main power switch or power cord before
attempting any repair or adjustment.