Figure 3. NHDI LINKS 2 Slave Installation
(3)Installation of LINKS 2 Slave Option
(a)The LINKS 2 module is capable of supporting up to 8 humidifiers when each unit is equipped with a TTL to RS-485 signal converter. The LINKS 2 slave option consists of a small bracket with the signal converter mounted on one side. In addition a terminal strip is provided to allow the humidifiers to be wired back to the master module.
(b)Mount the LINKS slave option on any humidifier that will be connected to the master module. The slave option mounts in the same location as the master LINKS module. Use 2 #8-32 screws and 2 #8-32 nuts to secure the bracket to the top of the humidifier cabinet.
(c)The provided 3-position terminal strip will be installed next to the standard humidifier strip using 2 #6-32 screws. For units being retrofitted, the existing terminal strip may have to be shifted to the right for the LINKS terminal strip to fit.
(d)Connect the 4-pin modular plug into one of the 2 modular jacks on the TTL to RS-485 signal converter.
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