Tunnel Master® wbc Installation Guide
Page 17
Figure 11. Relay Board Components
Relay Boards Components
The Tunnel Master® wbc ships with one relay board (standard). Up to three additional boards can be
mounted inside the box. The extra relay boards are optional and additional fees apply. Separate data
and power cables are used for each board.
Each board supports 24 relays for a total of 96 [24 × 4 = 96] directly controlled relays. A manual
override switch is included for each relay. Test connections in the manual override position prior to
system start-up. Each board includes a 24 V DC power terminal for remote relay board installations of
up to 200 feet. A single relay can be configured in ten ways as outputs.
ID
Description
ID
Description
1
Output Relay Terminals
4
Relay 1
2
Fuses 6.3 Amp
5
Input Power from 24V DC Power Terminal
3
Switch
Up = On
Middle = Off
Down = Computer Controlled
6
24V DC Power Terminal (If Remote Mount)
7
RJ-45 Network Terminal
Relay Board Wiring Guidelines
Relays on the relay boards are single-pole.
A 6.3 Amp, 250 V fuse protects each relay. Spare fuses along with LED fuse test indicators are
located at the bottom-left of the relay board.
Table 8. Relay Board Components
