| # | Part Number | Description | Manufacturer |
|---|---|---|---|
| 1 | MA-MT-275MU | MTRAK M275 MESSAGE UNIT | Digi International |
| 2 | HC4E-H-DC24V | RELAY GEN PURPOSE 4PDT 2A 24VGeneral Purpose Relay 4PDT (4 Form C) Socketable | Panasonic Electric Works |
| 3 | 2903330 | RELAY GEN PURPOSE DPDT 50MA 24VGeneral Purpose with Socket Relay DPDT (2 Form C) DIN Rail | Phoenix Contact |
| 4 | 2950501 | RELAY GEN PURPOSERelay | Phoenix Contact |
| 5 | 2271390 | PLUG-IN BASE STD I/O MODULESRelay Socket Through Hole | Phoenix Contact |
| 6 | P6BF-4BND DC24 | RELAY SOCKET DIN G3S4 G6B-4Relay Socket DIN Rail | Omron Electronics Inc-EMC Div |
| 7 | RT425012 | RELAY GEN PURPOSE DPDT 8A 12VGeneral Purpose Relay DPDT (2 Form C) 12VDC Coil Through Hole | TE Connectivity Potter & Brumfield Relays |
| 8 | 70MRCK8-EC | I/O MOUNTING BOARD MINI 8POSI/O Module Rack 8 Channel | Grayhill Inc. |
| 9 | PB-4R | I/O MOUNTING BOARD STANDARD 4POSI/O Module Rack 4 Channel | Sensata-Crydom |