| # | Part Number | Description | Manufacturer |
|---|---|---|---|
| 1 | MA-MT-275MU | MTRAK M275 MESSAGE UNIT | Digi International |
| 2 | PTF14A-TU | SOCKET LY4Relay Socket DIN Rail | Omron Automation and Safety |
| 3 | DK2A-PSL2 | SOCKET RELAY LATCH FOR DK RELAYSRelay Socket Through Hole | Panasonic Electric Works |
| 4 | SY4S-62 | SOCKET PCB MOUNT FOR RU4S/RY4SRelay Socket Through Hole | IDEC |
| 5 | PLE08-0 | RELAY SOCKET DPDT PCB MT MKRelay Socket Through Hole | Omron Automation and Safety |
| 6 | SP4-DC24V | RELAY GEN PURPOSE 4PDT 10A 24VGeneral Purpose Relay 4PDT (4 Form C) 24VDC Coil Socketable | Panasonic Electric Works |
| 7 | LKP1AF-24V | RELAY GEN PURPOSE SPST 10A 24VGeneral Purpose Relay SPST-NO (1 Form A) 24VDC Coil Through Hole | Panasonic Electric Works |
| 8 | XT484LB2 | RELAY GEN PURPOSE DPDT 8A 12VGeneral Purpose Relay DPDT (2 Form C) 12VDC Coil Socketable | TE Connectivity Potter & Brumfield Relays |
| 9 | ARS14Y12 | RELAY RF SPDT 500MA 12V | Panasonic Electric Works |