RPM General Purpose Relay Board Replacement | FRONTLINE Maintenance Tool

Last Updated: 04/24/2025 1:45 AM

The following table lists all the components that make up the document.

Title	Type	Status	Last Updated
Rapiscan CM-267 Conveyor Monitor	Device	Published	06/27/2024 1:02 PM
Rapiscan TM-850 Rail Monitor	Device	Published	09/18/2024 10:28 AM
Rapiscan VM-250 Vehicle Monitor	Device	Published	10/14/2024 9:50 AM
Rapiscan PM-700 Pedestrian Monitor	Device	Published	06/20/2024 11:38 AM
1402 - 7927 - Establish Initial Conditions; Remark:	Procedure Step	Published	09/30/2022 1:47 PM
7927 - Establish Initial Conditions	Instruction	Published	07/12/2023 12:23 AM
7372 - 7231 - Close lane; Remark:7233	Procedure Step	Published	09/01/2023 7:52 PM
7261 - Warning : Traffic should temporarily be rerouted or halted during this procedure to ens...	Annotation	Published	09/28/2023 2:09 PM
7231 - Close lane	Instruction	Published	04/18/2023 1:00 PM
7233 - Use orange safety (traffic control) cones to setup barriers. Practice establi...	Remark	Published	04/24/2023 12:18 PM
7269 - 7232 - Open RPM door; Remark:7234	Procedure Step	Published	04/27/2023 7:02 PM
7232 - Open RPM door	Instruction	Published	04/18/2023 1:02 PM
7234 - Open all doors needed to access components.	Remark	Published	04/19/2025 7:48 PM
7374 - 7235 - Power off RPM; Remark:7236	Procedure Step	Published	05/04/2023 4:15 PM
7235 - Power off RPM	Instruction	Published	04/24/2023 12:30 PM
7236 - Move LD-260 switch to OFF position. The PWR ON	Remark	Published	04/27/2023 4:25 PM
9719 - 9718 - Uninstall Faulty GPRB-756 from SC-770 Controller Module ...; Remark:	Procedure Step	Published	10/13/2023 1:48 PM
9718 - Uninstall Faulty GPRB-756 from SC-770 Controller Module ...	Instruction	Published	10/13/2023 1:48 PM
8239 - 8238 - Loosen SC-770 cover screws; Remark:8237	Procedure Step	Published	09/06/2023 4:14 PM
8238 - Loosen SC-770 cover screws	Instruction	Published	09/06/2023 4:03 PM
8237 - Use the medium Phillips screwdriver to loosen screws. The screws should be ca...	Remark	Published	09/06/2023 4:14 PM
9716 -	Remark	Published	10/13/2023 2:38 PM
8240 - 8235 - Pull cover straight out and away from SC-770 body before rotating lid down; Remark:9715	Procedure Step	Published	09/06/2023 4:18 PM
8236 - Caution : Do not rotate the lid down before pulling it straight away from the SC-770 bo...	Annotation	Published	09/06/2023 4:18 PM
8235 - Pull cover straight out and away from SC-770 body before rotating lid down	Instruction	Published	09/06/2023 4:17 PM
9715 -	Remark	Published	10/13/2023 2:36 PM
8246 -	Remark	Published	09/06/2023 4:32 PM
9717 - 9714 - Disconnect 3 MOLEX connectors from GPRB-756; Remark:9713	Procedure Step	Published	10/13/2023 2:32 PM
7792 - Note : It is good engineering practice to ensure all cables and connectors are label...	Annotation	Published	07/07/2023 2:17 PM
9714 - Disconnect 3 MOLEX connectors from GPRB-756	Instruction	Published	10/13/2023 2:03 PM
9713 -	Remark	Published	10/13/2023 2:31 PM
9730 - 9729 - Remove 4 Phillips head screws and retain for reuse; Remark:	Procedure Step	Published	10/13/2023 2:42 PM
9729 - Remove 4 Phillips head screws and retain for reuse	Instruction	Published	10/13/2023 2:42 PM
9731 - 9728 - Remove faulty GPRB-756; Remark:	Procedure Step	Published	10/13/2023 2:42 PM
9728 - Remove faulty GPRB-756	Instruction	Published	10/13/2023 2:42 PM
3397 - 3395 - Label faulty component; Remark:3396	Procedure Step	Published	07/21/2024 6:59 AM
3395 - Label faulty component	Instruction	Published	08/07/2021 11:07 AM
3396 - Use tag or tape. Include date of removal, description of failure symptoms, co...	Remark	Published	08/09/2021 11:35 AM
9726 - 9725 - Install New GPRB-756; Remark:	Procedure Step	Published	10/13/2023 3:00 PM
9725 - Install New GPRB-756	Instruction	Published	10/13/2023 2:46 PM
9723 - 9722 - Line up the new GPRB-756 with the screw holes, and re-install the four Philli...; Remark:	Procedure Step	Published	10/13/2023 3:01 PM
9722 - Line up the new GPRB-756 with the screw holes, and re-install the four Philli...	Instruction	Published	10/13/2023 3:01 PM
9724 - 9721 - Reconnect 3 MOLEX connectors to the GPRB-756; Remark:9720	Procedure Step	Published	10/13/2023 3:04 PM
7811 - Caution : Proper connection of cables is critical.	Annotation	Published	07/07/2023 9:48 PM
9721 - Reconnect 3 MOLEX connectors to the GPRB-756	Instruction	Published	10/13/2023 3:02 PM
9720 -	Remark	Published	10/13/2023 3:02 PM
8268 - 8261 - Close SC-770 module cover and tighten all screws; Remark:	Procedure Step	Published	09/07/2023 2:50 PM
8261 - Close SC-770 module cover and tighten all screws	Instruction	Published	09/07/2023 2:50 PM
7280 - 7250 - Power on RPM; Remark:7251	Procedure Step	Published	04/27/2023 4:14 PM
7250 - Power on RPM	Instruction	Published	05/01/2023 8:31 AM
7251 - Move LD-260 switch to ON position. The LED PWR ON	Remark	Published	05/10/2023 3:14 PM
7279 - 7249 - Return equipment to normal operating condition; Remark:	Procedure Step	Published	04/27/2023 4:13 PM
7249 - Return equipment to normal operating condition	Instruction	Published	04/08/2025 3:22 PM
7282 - 7254 - Confirm network connection; Remark:7255	Procedure Step	Published	04/27/2023 4:15 PM
7254 - Confirm network connection	Instruction	Published	04/27/2023 2:22 PM
7255 - Contact operators to confirm communications have been reestablished between RPM ...	Remark	Published	05/10/2023 3:15 PM
9735 - 319 - Perform operational test; Remark:9733	Procedure Step	Published	04/08/2025 2:22 PM
319 - Perform operational test	Instruction	Published	06/10/2021 8:31 PM
9733 - DET-RPM-RAP-RM03.	Remark	Published	10/13/2023 4:08 PM
8260 - 8250 - Reopen Lane; Remark:8249	Procedure Step	Published	09/07/2023 3:09 PM
8250 - Reopen Lane	Instruction	Published	09/07/2023 3:09 PM
8249 - Remove orange safety (traffic control) cones	Remark	Published	09/07/2023 3:09 PM
7842 - 7820 - Inform system operators upon completion of maintenance action; Remark:	Procedure Step	Published	07/07/2023 11:15 PM
7820 - Inform system operators upon completion of maintenance action	Instruction	Published	07/07/2023 10:02 PM
322 - 321 - Document maintenance actions; Remark:	Procedure Step	Published	06/17/2021 9:49 AM
321 - Document maintenance actions	Instruction	Published	04/21/2025 11:19 AM
2869 - 2585 - Document maintenance performed; Remark:2866	Procedure Step	Published	06/18/2021 5:58 PM
2585 - Document maintenance performed	Instruction	Published	07/09/2021 12:15 PM
2866 - Record observations, times, and results for the maintenance report.	Remark	Published	04/21/2025 11:39 AM
4706 - 4705 - Submit report; Remark:4864	Procedure Step	Published	06/29/2022 9:50 AM
4705 - Submit report	Instruction	Published	06/29/2022 9:50 AM
4864 - As specified by management or contractual obligations.	Remark	Published	07/28/2022 1:36 PM
Corrective Maintenance Procedure	Document Type	Published	03/02/2020 3:32 PM
minutes	Duration	Published	05/26/2022 11:41 AM
Upon failure of general purpose relay board	Frequency	Published	10/13/2023 1:18 PM
Warning	Annotation Type	Published	03/02/2020 3:25 PM
Caution	Annotation Type	Published	03/02/2020 3:24 PM
Note	Annotation Type	Published	03/02/2020 3:25 PM
Technician 1	Skill Level	Published	05/14/2020 2:56 PM
Phillips screwdriver, medium	Replacement Parts	Published	07/07/2023 11:39 PM
Keys to access RPM	Replacement Parts	Published	04/27/2023 6:56 PM
Reflective safety vest if required	Replacement Parts	Published	06/20/2023 4:47 PM
Ladder; 2 meters, 6 feet tall; non-conducting if required	Replacement Parts	Published	07/02/2023 4:48 PM
Traffic control cones or equivalent if required	Replacement Parts	Published	06/20/2023 4:47 PM
Safety glasses if required	Replacement Parts	Published	06/20/2023 4:47 PM
LD-260 Disconnect Switch Power Off	Image	Published	04/24/2023 12:49 PM
SC-770 Controller Screws	Image	Published	09/01/2023 5:56 PM
Loosen SC-770 cover screws	Image	Published	09/20/2023 1:14 PM
Loosen SC-770 cover screws zoom in	Image	Published	10/13/2023 2:17 PM
SC-770 lid cover removal instruction	Image	Published	10/13/2023 2:22 PM
SC-770 lid cover removal	Image	Published	09/06/2023 4:31 PM
GPRB-756	Image	Published	10/13/2023 2:27 PM
LD-260 Disconnect Switch Power On	Image	Published	05/04/2023 3:37 PM

DET-RPM-RAP-CM24

Replace the GPRB-756 general purpose relay board (GPRB).

Equipment Hierarchy

Rapiscan CM-267 Conveyor Monitor

Rapiscan TM-850 Rail Monitor

Rapiscan VM-250 Vehicle Monitor

Rapiscan PM-700 Pedestrian Monitor

Frequency

Upon failure of general purpose relay board

Technician Level

Technik 1

x 1

Duration

Time increment

minutes

Length of time

Tools Required

Phillips screwdriver, medium

Keys to access RPM

Reflective safety vest if required

Ladder; 2 meters, 6 feet tall; non-conducting if required

Traffic control cones or equivalent if required

Safety glasses if required

Materials Required

General purpose relay board

Originators

Craig Stinson

Bailey Toon

Originating Organization

PNNL

Approver

Eric Hirschi

Safety Concerns

Traffic

Retest Requirements

RPM Operational Test

Final Documentation

Corrective maintenance report

Departmental Coordination

Prior to arrival, notify operators concerning expected work, duration, and anticipated alarms and fault indications.

Date of Origin

2017-01-12

Step 1

Main Step

1402 - 1401 - Establish Initial Conditions; Remark:

Step 00

7927 - Establish Initial Conditions

Establish Initial Conditions

7372 - 7231 - Close lane; Remark:7233

7261 - Warning : Traffic should temporarily be rerouted or halted during this procedure to ens...

Type

Warning

Traffic should temporarily be rerouted or halted during this procedure to ensure safety and prevent unscreened vehicles from passing.

Step 00

7231 - Close lane

Close lane

7233 - Use orange safety (traffic control) cones to setup barriers. Practice establi...

Use orange safety (traffic control) cones to setup barriers. Practice established safety protocols.

7269 - 7232 - Open RPM door; Remark:7234

Step 00

7232 - Open RPM door

Open RPM door

7234 - Open all doors needed to access components.

Open all doors needed to access components.

7374 - 7235 - Power off RPM; Remark:7236

Step 00

7235 - Power off RPM

Power off RPM

7236 - Move LD-260 switch to OFF position. The PWR ON

Move LD-260 switch to OFF position. The PWR ON LED will turn off.

Step 2

Main Step

9719 - 9718 - Uninstall Faulty GPRB-756 from SC-770 Controller Module ...; Remark:

Step 00

9718 - Uninstall Faulty GPRB-756 from SC-770 Controller Module ...

Uninstall Faulty GPRB-756 from SC-770 Controller Module

8239 - 8238 - Loosen SC-770 cover screws; Remark:8237

Step 00

8238 - Loosen SC-770 cover screws

Loosen SC-770 cover screws

8237 - Use the medium Phillips screwdriver to loosen screws. The screws should be ca...

Use the medium Phillips screwdriver to loosen screws. The screws should be captured and should not come completely out of the lid.

9716 -

8240 - 8235 - Pull cover straight out and away from SC-770 body before rotating lid down; Remark:9715

8236 - Caution : Do not rotate the lid down before pulling it straight away from the SC-770 bo...

Type

Caution

Do not rotate the lid down before pulling it straight away from the SC-770 body; doing so will break the hinge.

Step 00

8235 - Pull cover straight out and away from SC-770 body before rotating lid down

Pull cover straight out and away from SC-770 body before rotating lid down

9715 -

8246 -

9717 - 9714 - Disconnect 3 MOLEX connectors from GPRB-756; Remark:9713

7792 - Note : It is good engineering practice to ensure all cables and connectors are label...

Type

Note

It is good engineering practice to ensure all cables and connectors are labeled before disconnecting them.

Step 00

Main Step

Proper connection of cables is critical.

Step 00

Main Step

Corrective Maintenance Procedure

Percent Complete

100.00

Percent Complete W/Media

100.00