Alstom iSTAT M212 - 9.3 Inputs and Outputs; 9.3.1 Energy Pulse Outputs; 9.3.2 Tariff (inputs)

User Manual M2x2/EN M/F
iSTAT M2x2 Page 23
Position
Data direction Description
21 MC input pin Data reception (Rx)
22 − Grounding ( )
RS232
23 MC output pin Data transmission (Tx)
21 To/From MC A
22 − Do not connect!
RS485
23 To/From MC B
USB
To/From MC USB B
TABLE 10-1 : RS232, RS485, AND USB CONNECTIONS
9.3 Inputs and Outputs
The M2x2 has two rear hardware modules; module 1 is always fitted with pulse contact
outputs which on the M232 can also be used as alarm outputs if pulses are not required.
Tariff inputs are available as an option on module 2.
M212 M232
2 energy contacts
 
2 tariff inputs (optional)
 
2 alarm contacts (using energy
contacts)

TABLE 10-2 : INPUTS AND OUTPUTS
I/O hardware module 1 uses terminals 15/16/17 and module 2 uses 18/19/20.
9.3.1 Energy Pulse Outputs
The 2 energy pulsed outputs are always fitted on the M2x2 and can be used for external
monitoring of energy consumption. The energy measuring via the pulsed outputs
corresponds to the basic energy measurement on the M2x2 display. The pulsed outputs'
energy measurement can be adapted to the customers’ needs via the remote
communications link.
Connections
TABLE 10-3: DUAL ENERGY CONTACTS
The hardware module has three terminals (see 10-3), the energy contacts share a common
connection but each contact can be individually set.
9.3.2 Tariff (inputs)
The 2 tariff inputs can be used to set the currently active tariff. They are an option module
that must be defined at the time of ordering.
The hardware module has three terminals (see table 10-4), the tariff voltage inputs are 110
or 23
0Vac ± 20% (order option) and share a common connection but each input can be
individually set. When both inputs on the module are used, the M2x2 will provide a maximum
of 4 tariffs.