M1XSP Installation Manual
Page 3
General Installation and Setup
1.
The M1XSP operates on the M1's Keypad data bus and may be remotely located near the equipment to which it is
interfacing. Two (2) #6 x 1/2" screws (not provided), one on each side of the black box should be used. It can also be
mounted inside the M1 cabinet using the same method OR by removing the board from the black box and installing the
board into a pair of ELK-SWG Plastic Glide brackets.
2.
Before making any wiring connections, turn Off the M1 Master Power Switch.
3.
Connect ter12V, A, B, and Neg from the M1XSP to the M1's Keypad Data Bus (terVKP, Data A, Data B, &
Neg).
NOTE: Refer to the M1 Installation Manual and the M1DBH information in this manual about proper
connections of data bus devices with multiple homerun cables.
4.
There are 4 address switches, each with a position of OFF or ON (binary value 0 or 1) and a decimal equivalent value of
(1, 2, 4, or 8). The total decimal value of the "ON" switches equates to the data bus address. As a rule, the first M1XSP
should be set to address 1. If more than 1 M1XSP is installed, set each one to a unique (sequential) address (2, 3, etc).
IMPORTANT: Only data bus addresses 1, 2, 3, or 4 are valid when interfacing with HAI Thermostats. Data bus address 1 MUST
be selected for HAI Thermostats numbered 1 thru 4. Data bus address 2 for HAI Thermostats numbered 5 to 8. Data bus
address 3 for HAI Thermostats numbered 9 to 12. Data bus address 4 for HAI Thermostats numbered 13 to 16.
5.
Set the "Mode" and "Baud" jumpers according to the desired application. Refer to the jumper settings table on the back of
this manual for a complete listing of these jumpers. In some cases the baud rate is not required as it is internally fixed
according to the mode/protocol.
"DB9" 9 Pin
RS-232
Connection to
other Mfg.
INSTALL UNIT * SET ADDRESS AND OPTION JUMPERS * ACTIVATE M1 BUS ENROLLMENT PROCESS
RS-485
M1 Data Bus
Connection
RS-485
Connection
to other Mfg.
Data Bus
Address
Switches
Jumpers
S1,S2,S3 select
BAUD rate
Jumpers
S4,S5,S6,S7,S8
select Interface
MODE
J1 -Factory
Use ONLY!
JP3 - Jumper selects
between RS-232 or
RS-485
JP5 - Jumper Selects
+12VDC to DB9 Pin 4
(MUST be in-place for
HAI Thermostats)
JP1 - Jumper selects
termination of M1
RS-485 Data Bus
JP2 - Jumper selects
termination of
other Mfg. RS-485
Table 1: Data Bus Address Switch Settings
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
Address 1
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
Address 2
Address 3
Address 4
Address 5
Address 6
Address 7
LEGEND
ON
OFF
M1XSP Data Bus Terminating Jumper
JP1 Used to engage a 120 Ohm resistor for
terminating the M1 RS-485 Data Bus. See
Data bus wiring instructions before use.
For an M1XSP the only valid Data Bus
Addresses are 1 thru 7 since the max.
number of M1XSPs is 7.
