MCN Monitoring and Control Network
Comparator Display System
Channel Control Unit
CCU-2
Hardware Reference Manual
S2-61424-100
Note:
Switch settings vary
depending upon the system.
Be sure to verify switch settings
before installation
Be sure to set the rotary address switches to the
proper addresses before installing the system.
FCC Statement
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate
the equipment.
DOC Statement
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
This manual describes products which include copyrighted CTI Products, Inc. computer programs in semiconductor memory. CTI Products, Inc. reserves
all rights for these programs, including the exclusive right to copy or reproduce the copyrighted computer programs in any form. No copyrighted computer
program contained in products described in this manual may be copied, reproduced, decompiled, disassembled, or reversed engineered in any manner
without express written permission of CTI Products, Inc. The purchase of products from CTI Products, Inc. shall not be deemed to grant either directly or
by implication, estoppel, or otherwise, any license under the copyrights, patents, or patent applications of CTI Products, Inc., except for the normal nonexclusive, royalty fee license to use that arises by operation of law in the sale of the product.
Information contained in this document is subject to change without notice and does not represent a commitment on the part of CTI Products, Inc.
Computer Software Copyrights
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for
any purpose without the written permission of CTI Products, Inc.
Copyright 1995-2008 CTI Products, Inc. All rights reserved.
MCN, CIB, CCU, CCU-2 and MCNRCD are trademarks of CTI Products, Inc. Other trademarks referenced are properties of their respective owners.
68-12067-100
2
CCU-2 Hardware Reference
CTI Products, Inc.
Standard Limited Hardware Warranty
LIMITED WARRANTY. Equipment manufactured by CTI Products, Inc. is warranted to be free from defects in material and workmanship for a period
of ONE (1) YEAR from date of shipment to original purchaser. Under this warranty, our obligation is limited to repairing or replacing any equipment
proved to be defective by our inspection within one year of sale to the original purchaser. This warranty shall not apply to equipment which has been
repaired outside our plant in any way, so as to, in the judgment of CTI Products, Inc. affect its stability or reliability, nor which has been operated in a
manner exceeding its specifications, nor which has been altered, defaced, or damaged by lightning.
CUSTOMER REMEDIES. In the event of a defect, malfunction, or failure to conform to specifications established by the seller during the period shown,
the customer shall call CTI Products, Inc. to obtain a Return Authorization Number and return the product or module, shipping and insurance prepaid. CTI
Products, Inc., will then at its option, either repair or replace the product or module and return it, shipping prepaid, or refund the purchase price thereof.
On-site labor at the purchaser's location is not included in this warranty.
EQUIPMENT NOT MANUFACTURED BY CTI Products, Inc. Equipment not manufactured by CTI Products, Inc. is excluded from this warranty,
but is subject to the warranty provided by its manufacturer, a copy of which will be supplied to you upon specific written request.
NO OTHER WARRANTIES. The foregoing constitutes the sole and exclusive remedy of the buyer and exclusive liability of CTI Products, Inc., AND IS
IN LIEU OF ANY AND ALL OTHER WARRANTIES EXPRESSED OR IMPLIED OR STATUTORY AS TO MERCHANTABILITY, FITNESS FOR
PURPOSE SOLD, DESCRIPTION, QUALITY, PRODUCTIVENESS OR ANY OTHER MATTER.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. WITHOUT LIMITING THE FOREGOING, IN NO EVENT SHALL CTI
PRODUCTS, INC. OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION,
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION,
LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE CTI
PRODUCTS, INC. EQUIPMENT BY PURCHASER OR OTHER THIRD PARTY, WHETHER UNDER THEORY OF CONTRACT, TORT
(INCLUDING NEGLIGENCE), INDEMNITY, PRODUCT LIABILITY OR OTHERWISE, EVEN IF CTI PRODUCTS, INC. HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR LOSSES. IN NO EVENT SHALL CTI PRODUCTS, INC.’S, LIABILITY
EXCEED THE TOTAL AMOUNT PAID BY PURCHASER FOR THE EQUIPMENT GIVING RISE TO SUCH LIABILITY
68-11843-100
3
CCU-2 Hardware Reference
Phone: (513) 595
-
5900. (8:30 to 5:00 Eastern)
CTI Products, Inc.
Manual Revisions:
S2-61424-100 Original Release.
68-11843-100
CTI Products, Inc.
1211 W. Sharon Rd.
Cincinnati, OH 45240
4
CCU-2 Hardware Reference
CTI Products, Inc.
TABLE OF CONTENTS
1. INTRODUCTION................................................................................................................7
1.1 R
EFERENCE DOCUMENTS
........................................................................................................7
2. SPECIFICATIONS..............................................................................................................8
3. INPUTS & OUTPUTS.........................................................................................................9
4. THEORY OF OPERATION ............................................................................................10
4.1 L
4.2 R
ATCH ACTION
EDUNDANT PATH APPLICATIONS
.....................................................................................................................10
........................................................................................10
4.3 LEDS....................................................................................................................................11
4.3.1 Input LEDs ....................................................................................................................11
4.3.2 Output LEDs..................................................................................................................11
4.3.3 PWR, ERR, ACT LEDs..................................................................................................11
5. OPTION SWITCHES & JUMPERS...............................................................................12
5.1 G
5.2 O
5.3 I
ROUP & MODULE SWITCHES
PTION SWITCHES
NITIALIZING THE RELAYS
................................................................................................................12
.....................................................................................................13
..............................................................................................12
5.3.1 Initializing the Relays with the Front Panel Switches ..................................................13
5.4 J
UMPER OPTIONS
..................................................................................................................14
6. CONNECTORS.................................................................................................................15
6.1 J1 50-P
IN CONNECTOR PINOUT
.............................................................................................16
7. MOUNTING.......................................................................................................................17
8. OPERATION IN AN MCN NETWORK........................................................................18
9. TROUBLESHOOTING....................................................................................................19
68-11843-100
5
CCU-2 Hardware Reference
CTI Products, Inc.
68-11843-100
6
CCU-2 Hardware Reference Introduction
CTI Products, Inc.
1. Introduction
The CCU-2 Channel Control Unit is used to control functions in a Land Mobile
Radio System such as:
Main / Standby System Selection
The CCU-2 module allows up to six independent consoles to control a common
function. It allows all the consoles to force the function to Main or Standby and
provides feedback to the consoles to indicate the state of the function. If one
console fails, the other may continue to control the system functions.
The CCU-2 module provides status indication of each function on the MCN
(Monitoring and Control Network), similar to a CIB module. It also allows the
function to be forced from a PC running the MCN Remote Comparator Display
(MCNRCD) software.
The CCU-2 module is an MCN GPIO-1208L General Purpose I/O Module with
special firmware.
A
111210987654321
7
6
5
4
3
2
IN
OUTNETWORK
B
1 2 3 4 5 6 7 8 9 10 1112
PWR ACT
8
9
8
9
8
9
A
B
C
D
E
F
0
1
7
A
7
A
B
6
B
6
5
4
3
2
C
5
C
D
4
D
E
3
E
F
2
F
0
1
0
1
123 4
ON
ERR
SVC
RESETDC IN OPTIONMODULEGROUP
Front View
Figure 1 – CCU-2 Module
1.1 Reference Documents
1. Monitoring and Control Network System Manual
Part Number S2-60425
J1
Rear View
E1 A
E1 B
CA-80851-100
68-11843-100
7
CCU-2 Hardware Reference Specifications
CTI Products, Inc.
2. Specifications
Size 5.5” x 4.2” x 1.5”
(140 x 107 x 38 mm)
Weight 19 oz (540 gm)
Temperature 0 – 50 ºC
Humidity 10 - 95% non-condensing
Module Power +15 to +30 VDC
Inputs 6 sets of Force A & Force B inputs
Opto-isolated, unidirectional.
External voltage required.
Input Levels (across inputs) Inactive: < 0.5 VDC across inputs
Active: 5 to 30 VDC
Input Trigger Transition Polarity
(Force A or Force B)
Fault Tolerance A proper input transition on a Force A
Input Impedance: 5 K Ohms, min
Number of Sections Supported 1 Section
Outputs (for control or feedback) 8 Form C Relays, magnetically latched.
Output Contacts Bifurcated, Gold flashed
Maximum Power Dissipation 2 Watts
Input/Output Connection 50 pin Telco style
Network Connector (2) RJ-45 (1 in, 1 out)
On leading edge
(from Inactive to Active)
or Force B input will override other
inputs, even those stuck active.
All driven in parallel
Low level (20 uA, 20 mV) to
24 VAC/VDC, 1 A Max., Resistive
Contacts used in applications which
cause contact arcing (typically
inductive, capacitive, or lamp circuits or
circuits with over 12V and 250 mA)
will not be suitable for switching low
level signals.
Table 1 - Module Specifications
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CCU-2 Hardware Reference Specifications
CTI Products, Inc.
3. Inputs & Outputs
Figure 2 shows the equivalent circuits of the CCU I/O pins.
Figure 2 - I/O Equivalent Circuit
The function of the 12 inputs is as follows:
Input Function
1 Force A 1
2 Force A 2
3 Force A 3
4 Force A 4
5 Force A 5
6 Force A 6
7 Force B 1
8 Force B 2
9 Force B 3
10 Force B 4
11 Force B 5
12 Force B 6
Outputs are pinned out so that adjacent relays can control audio pairs.
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CCU-2 Hardware Reference Switches & Jumpers
CTI Products, Inc.
4. Theory of Operation
The CCU-2 contains the following:
A Single Latching Section with 8 Form C Outputs
(6) Force A Inputs
(6) Force B Inputs
4.1 Latch Action
The latch is set to the A or B position by the Force A and Force B inputs as
follows:
Input Transition Latched State
Force A x Inactive to Active A
Force B x Inactive to Active B
The CCU-2 will take action only on a transition of an input from Inactive to
Active. If an input is stuck Active or Inactive, it will not prevent another input
from switching the state of the latch. This provides fault tolerance for stuck (or
open) inputs.
Since the relays are magnetically latched relays, they will hold their state even
when the power to the CCU-2 module is off. Upon Power-up or Reset, the CCU
will ignore the inputs for approximately 1 second to allow the inputs time to
settle.
Status bits provide feedback to PCs on the MCN network. Depending upon the
Display Table used for the particular function, the state of the output(s) and / or
the input(s) can be seen.
Control bits provide input from PCs on the MCN network. Depending upon the
Display Table used for the particular function, the operator may force the latch to
the A or B state.
4.2 Redundant Path Applications
Since there are 6 pairs of inputs, the CCU-2 may be used in applications that have
multiple paths for the Force A and Force B signals. For instance, you could set up
three consoles with redundant paths as follows:
Console Path Force A Input Force B Input
1 Forward ForceA1 ForceB1
1 Reverse ForceA2 ForceB2
2 Forward ForceA3 ForceB3
2 Reverse ForceA4 ForceB4
3 Forward ForceA5 ForceB5
3 Reverse ForceA6 ForceB6
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CCU-2 Hardware Reference Switches & Jumpers
CTI Products, Inc.
4.3 LEDs
The CCU-2 has input and output LEDs.
Input LEDs
Output LEDs
IN
4.3.1 Input LEDs
The left-side "A" LEDs are the input LEDs, one for each input.
LED On Input Active
LED Off Input Inactive
The input LED mapping is as follows:
LED Function
A1-A6 ForceA1 – Force A6
A7-A12 ForceB1 – ForceB6
The input LEDs will all blink on upon power-up as a self-test.
4.3.2 Output LEDs
Output LEDs indicate the state of each of the 8 outputs:
LED On Output A
LED Off Output B
A
111210987654321
OUTNETWORK
1 2 3 4 5 6 7 8 9 10 1112
8
9
7
A
B
6
5
4
E
3
F
2
0
1
B
PWR ACT
SVC
ERR
8
8
7
6
5
C
4
D
3
2
1
9
9
7
A
A
F
0
B
6
B
E
C
5
C
D
4
D
E
3
F
2
0
1
123 4
ON
RESETDC IN OPTIONMODULEGROUP
Since all relays are driven to the same state, the output LEDs should be all on or
all off.
4.3.3 PWR, ERR, ACT LEDs
The CIB has three additional LED indicators on the front panel.
PWR On when sufficient power is present
Blinks when the voltage is low.
ERR 1 Blink: Group:Module set to FF:F (Invalid address)
2 Blinks: Improper internal daughter boards detected
Solid On: Other error (hardware or software)
ACT On: Connected to a PC running MCNRCD software
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CCU-2 Hardware Reference Switches & Jumpers
CTI Products, Inc.
5. Option Switches & Jumpers
Addressing and option switches are provided for module configuration. The
module must be power cycled or reset after these switches are set so that the
options will take effect. Press the Reset toggle switch down to reset the module.
A
111210987654321
IN
OUTNETWORK
5.1 Group & Module Switches
The Group and Module rotary selector switches are used to set the node address
during module installation. Each module must have a unique Group:Module
address. Refer to the Monitor and Control Network System Manual for details
about address planning or the Custom System Configuration documentation for
pre-assigned addresses if your system is a Custom Engineered system.
SWITCH DESCRIPTION DEFAULT
GROUP unit address setting (00-FE)
refer to the MCN System Manual
MODULE unit address setting (0-F)
refer to the MCN System Manual
Table 2 – Group & Module Switches
1 2 3 4 5 6 7 8 9 10 11 12
8
7
6
5
4
3
2
1
B
8
9
9
A
B
C
D
E
F
0
7
7
A
6
B
6
5
C
5
4
D
4
3
E
3
2
F
2
0
1
PWR ACT
ERR
8
9
A
B
C
D
E
F
0
1
123 4
ON
SVC
RESETDC IN OPTIONMODULEGROUP
00
0
5.2 Option Switches
The Option switches allow the technician to pre-set the relay outputs.
OPTION
SWITCH
1 Not used Down
2 Not used Down
3 Reset Initial State See Table 4 Down
4 Reset Initialize Enable See Table 4 Down
Option Switches 3 & 4 are used to select the initial state at power-up and reset:
SW3 SW4 Initial State on Power Up or Reset Default
Down Down Do not re-initialize. Use last stored state. X
Up Down Do not re-initialize. Use last stored state.
Down Up Initialize to State B (LEDs Off)
Up Up Initialize to State A (LEDS On)
68-11843-100
DESCRIPTION Notes Default
Table 3 - Option Switches
Table 4 – Initial State on Reset
12
CCU-2 Hardware Reference Switches & Jumpers
CTI Products, Inc.
5.3 Initializing the Relays
The relays in the CCU-2 are magnetically latched and will retain their state when
power is off. The normal state will be all On or all Off.
If the relays come up in a random pattern when the power is initially applied, it is
probably because the relays were jarred during transport or installation.
There are two ways to initialize the relays:
1. Use the normal Force A or Force B inputs to set the latch to state A or B.
This is easiest way to initialize the relays if you have the CCU connected
to the system.
2. Use the front panel switches to initialize the relays.
You can use this method if you don't yet have the CCU-2 connected in the
system.
5.3.1 Initializing the Relays with the Front Panel Switches
To initialize the relays to state A:
1. Set switches as follows:
3 Up 4 Up.
2. Press the Reset Switch down and wait for 2 seconds.
3. The CCU-2 (and all the relays) should go into State A.
All the output LEDs should be On.
4. Set switches as follows:
3 Down 4 Down
5. Press the Reset Switch down and wait for 2 seconds.
6. The CCU-2 (and all the relays) should STAY in State A.
All the output LEDs should be On.
To initialize the relays to state B:
1. Set switches as follows:
3 Down 4 Up.
2. Press the Reset Switch down and wait for 2 seconds.
3. The CCU-2 (and all the relays) should go into State B.
All the output LEDs should be Off.
4. Set switches as follows:
3 Down 4 Down
5. Press the Reset Switch down and wait for 2 seconds.
6. The CCU-2 (and all the relays) should STAY in State B.
All the output LEDs should be Off.
Both procedures assume that you want the CCU-2 to maintain the last state on
power up. If you want the CCU-2 to always start up in State A or State B, use the
appropriate switch settings from table Table 4 in steps 4 above.
68-11843-100
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CCU-2 Hardware Reference Switches & Jumpers
CTI Products, Inc.
5.4 Jumper Options
Figure 3 shows the jumper options on the rear of the unit.
E1 A
E1 B
CA-80024-100
Figure 3 - Jumper Options
Neither of the jumper positions is connected on this unit.
68-11843-100
14
CCU-2 Hardware Reference Connectors
CTI Products, Inc.
6. Connectors
The NETWORK IN/OUT ports on the front of the CCU are used to connect the
CCU with other MCN modules. These ports carry both the network data signals
as well as DC power for power distribution with other modules. Table 5 gives the
pinout for these connectors. Figure 4 shows the location of pin 1 for each port.
PRODUCTS, INC.
IN
PIN 1
NETWORK
OUT
DC IN
CA-80068-100
Figure 4 - Network IN/OUT Ports
Pin Function
1 DATA +
2 DATA 3 + POWER
4 No Connect
5 No Connect
6 - POWER
7 - POWER
8 + POWER
Table 5 - Network Connector Pinout
The DC IN port provides the primary power connection to the module. Power is
distributed through the NETWORK OUT connector to provide power to the
NETWORK IN connector of the MCN unit it is connected to. Each power
supply can power up to four units total. See reference 1 for complete details of
connections to the network and DC IN connectors.
The Network In connector can be used for input power even if the CCU-2 module
will not be connecting to a PC. Be sure that its Group & Module address are set
so that the address doesn't conflict with any other modules in the system.
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CCU-2 Hardware Reference Connectors
CTI Products, Inc.
6.1 J1 50-Pin Connector Pinout
Connector J1 provides the discrete I/O signals.
The following tables show the pinouts in Punch-Block order.
J1 Pin In/Out CCU-2 Module Signal Front Panel LED
26 In Force A1+ A1
1 In Force A1- A1
27 In Force A2+ A2
2 In Force A2- A2
28 In Force A3+ A3
3 In Force A3- A3
29 In Force A4+ A4
4 In Force A4- A4
30 In Force A5+ A5
5 In Force A5- A5
31 In Force A6+ A6
6 In Force A6- A6
32 In Force B1+ A7
7 In Force B1- A7
33 In Force B2+ A8
8 In Force B2- A8
34 In Force B3+ A9
9 In Force B3- A9
35 In Force B4+ A10
10 In Force B4- A10
36 In Force B5+ A11
11 In Force B5- A11
37 In Force B6+ A12
12 In Force B6- A12
38 Out Output 1 Com B1
13 Out Output 2 Com B2
39 Out Output 1 A B1 (On)
14 Out Output 2 A B2 (On)
40 Out Output 1 B B1 (Off)
15 Out Output 2 B B2 (Off)
41 Out Output 3 Com B3
16 Out Output 4 Com B4
42 Out Output 3 A B3 (On)
17 Out Output 4 A B4 (On)
43 Out Output 3 B B3 (Off)
18 Out Output 4 B B4 (Off)
44 Out Output 5 Com B5
19 Out Output 6 Com B6
45 Out Output 5 A B5 (On)
20 Out Output 6 A B6 (On)
46 Out Output 5 B B5 (Off)
21 Out Output 6 B B6 (Off)
47 Out Output 7 Com B7
22 Out Output 8 Com B8
48 Out Output 7 A B7 (On)
23 Out Output 8 A B8 (On)
49 Out Output 7 B B7 (Off)
24 Out Output 8 B B8 (Off)
50 nc
25 nc
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CCU-2 Hardware Reference Mounting
CTI Products, Inc.
7. Mounting
Various mounting kits are available to mount the CCU-2 module.
Mounting Kits
Rack Mount - 4 A size modules
1 Rack Unit (1.75") High
Rack Mount - 2 A size modules plus 1 B size module
1 Rack Unit (1.75") High
(Used to mount 2 CCUs and 1 EXB module.)
Refer the reference 1, section Mounting Options, for physical details about
mounting the CCU module.
S2-60435
S2-60443
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CCU-2 Hardware Reference Troubleshooting
CTI Products, Inc.
8. Operation in an MCN Network
The CCU-2 module can operate in stand-alone mode with just connections to its
50 pin I/O connector and no connection to the MCN network. However, if it is
used in a system with one or more PCs running MCNRCD software it may be
monitored & controlled from those PCs.
A special set of Default files is available for use with MCN Config configuration
program for the CCU-2. Special items include:
Module Type: CCU-2
Display Tables CCU Input A, CCU Input B, CCU Output
The CCU Module configuration will include the following I/O points in the MCN
Config program:
I/O Point Name Display Table
1 Force A 1 CCU Input A
2 Force A 2 CCU Input A
3 Force A 3 CCU Input A
4 Force A 4 CCU Input A
5 Force A 5 CCU Input A
6 Force A 6 CCU Input A
7 Force B 1 CCU Input B
8 Force B 2 CCU Input B
9 Force B 3 CCU Input B
10 Force B 4 CCU Input B
11 Force B 5 CCU Input B
12 Force B 6 CCU Input B
13 Output 1 CCU Output
14 Output 2 CCU Output
15 Output 3 CCU Output
16 Output 4 CCU Output
17 Output 5 CCU Output
18 Output 6 CCU Output
19 Output 7 CCU Output
20 Output 8 CCU Output
The inputs will show the state of the external Force A and Force B inputs.
The output points will show the states of the 8 relays. (All relays should show
the same state).
The state of the latch may be changed by forcing one of the outputs on or off
as follows:
MCN State CCU-2 Latch State
On A
Off B
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CCU-2 Hardware Reference Troubleshooting
CTI Products, Inc.
9. Troubleshooting
This table is a list of troubleshooting tips specific to the CCU-2 module. For
additional troubleshooting tips, refer to the troubleshooting section found in the
Monitoring and Control Network System Manual, reference 1.
Due to the high percentage of surface-mount components, the CCU is treated as a
field replaceable unit. If any system problems are the result of a malfunctioning
CCU unit, the entire unit must be replaced and returned for repair.
PROBLEM CAUSE
The PWR LED flashes The input DC voltage is low. You may have too many modules
in line. There is a voltage drop in each module and the
downstream modules will each see a lower DC voltage.
The ERR LED flashes once The Group & Module switches are set to FF:F.
This is an invalid address. Set the Group & Module switches to
the proper address for your system and press the Reset switch
down.
The ERR LED flashes twice The CCU-2 has not detected the proper internal daughter boards.
Call the factory for an RMA.
The ERR LED is on solid Internal hardware or firmware error.
Call the factory for an RMA.
Input LEDs are stuck on An input may be stuck active. Remove the 50-pin I/O connector.
If the input LED goes off, your problem is external to the CCU.
If the input LED remains stuck on, there is an internal problem in
the unit. Call the factory for an RMA.
The Output LEDs (and
relays) come up in a random
state on initial power-up
The relays may have been jarred during transport.
Initialize the relays as described in section 5.3, Initializing the
Relays above.
If this problem persists and is not due to mechanical shock on the
relays, it indicates an internal problem. Call the factory for an
RMA.
One of the output LEDs does
not switch with the others
There is an internal problem in the unit. Call the factory for an
RMA.
68-11843-100
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CCU-2 Hardware Reference Troubleshooting
CTI Products, Inc.
PROBLEM CAUSE
The CCU doesn't hold the
last state on power-up or
reset
The CCU holds the last state
on power-up (and we need it
to come up in a known state)
The PC shows the receivers
from this CCU-2 module as
"Offline".
The ACT LED on the CCU is
off
Check Option Switch 4. If it is up, the CCU will initialize this
state based upon Switch 3. See Table 4 – Initial State on Reset.
Set Switches 3 & 4 Down and reset the unit.
Check Option Switch 4. If it is down, the CCU will start up
using the previous state. If you need it to start up in a known
state (A or B), set the proper state on Switches 3 & 4 and reset
the unit. See Table 4 – Initial State on Reset for details.
Check the MCN cabling.
Also check that the CCU-2 address and the address for the
CCU-2 module in the PC database match.
In an engineered system (with routers and/or EXB modules) the
PC may have an improper address or the module might be
installed on the wrong MCN sub-network. Check the custom
system documentation for the proper settings and connections.
If you don't have a PC talking to the CCU module this is normal.
If you do have a PC that needs to connect to the CCU module,
try the suggestions in the "Offline" problem above.
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