HGM-MZ to N2 Communications Adapter
Rev 1 (P/N 3015-5514) 5
HGM
Addr
A5 A6 A7 A8 Switch Positions
HGM
Addr
A5 A6 A7 A8 Switch Positions
0 Off Off Off Off
8 On Off Off Off
1 Off Off Off On
9 On Off Off On
2 Off Off On Off
10 On Off On Off
3 Off Off On On
11 On Off On On
4 Off On Off Off
12 On On Off Off
5 Off On Off On
13 On On Off On
6 Off On On Off
14 On On On Off
7 Off On On On
15 On On On On
Since the HGM is the only node on the adapter-to-HGM interface, address 1 is normally used. Be sure to set
the same address on the adapter and the HGM main board DIP switches.
5. Configuring the HGM-MZ with MZ-RD or Laptop PC
The only HGM parameters that are changeable through Metasys are the alarm thresholds. Configuring the
HGM for refrigerant type and length of tubing for each zone (zero length to disable a zone) must be done with
the MZ-RD remote display or a laptop PC. Refer to the appropriate Bacharach instructions for configuring
these items. HGM’s are commonly custom-configured at the factory per the customer’s needs, so field
configuring these parameters may not be necessary.
If configuring the HGM-MZ with an MZ-RD, the communications adapter’s presence will not affect the
standard configuration procedure. If configuring with a laptop PC, temporarily disconnect the HGM-MZs
RS-485 cable from the adapter until configuration is complete and the laptop is disconnected.
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