| # | Part Number | Description | Manufacturer |
|---|---|---|---|
| 1 | MA-MT-275MU | MTRAK M275 MESSAGE UNIT | Digi International |
| 2 | S11 | RELAY SOCKET 11 OCTAL DIN MOUNTRelay Socket DIN Rail | Crouzet |
| 3 | 2900934 | RIF-2-BPT/4X21Relay | Phoenix Contact |
| 4 | SM2S-05 | SOCKET DIN MOUNT SCREW TYPERelay Socket DIN Rail | IDEC |
| 5 | SR6D4024 | RELAY SAFETY 4PST 8A 24VSafety Relay 4PST-NO/NC (2 Form A, 2 Form B) 24VDC Coil Through Hole | TE Connectivity Potter & Brumfield Relays |
| 6 | 9270-12-20 | RELAY RF SPST 500MA 12V | Coto Technology |
| 7 | SV9Z-J232S | 14MM RELAY JUMPER BLUEJumper RV8 Series | IDEC |
| 8 | ARN30A4H | RELAY RF SPDT 4.5V | Panasonic Electric Works |
| 9 | B10-03B | RELAY RF SPST 250MA 3.3V | Coto Technology |