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Device handbook SIRAX BM1450
21/36
Enclosure
(acc. to IEC 60529):
IP 54 (front), IP 20 (housing/terminals)
Measurement category:
Measuring inputs: 1000 V CAT II, 600 V CAT III
Power
supply:
300
V
CAT
III
High voltage test (acc. to IEC 61010-1-2010):
Frequency AC 50 Hz, test duration 60 sec.
• Housing against all electrical circuits
4400 V AC
• Power supply against all other circuits
3700 V AC
• Inputs against all other circuits
2200 V AC
• Relay to relay
2200 V AC
• Bus-RS485 against all other circuits
2200 V AC
Interface
Modbus/RTU
via plug-in terminal (B, A, Gnd)
Protocol:
Modbus/RTU
Physics:
RS485,
max
1200
m
Baud rate:
4800, 9600, 19200, 38400, 57600 Baud
Parity:
Odd or Even, with 1 stop bit, Or None with 1 or 2 stop bits
Number of participants:
≤ 32
Outputs
Relaiy
via plug-in terminal
Number of relays:
4 (freely selectable for limit, pulse or timer output)
Switching voltage:
250 V AC / 30 V DC
Switching
current:
5
A
9.1 Dimensional drawing
96mm
80mm
96mm
9.2 Connection and programming via RS485 (Modbus) interface
If the transmitter is programmed via the RS485 interface and Modbus, the following steps must be followed:
Step 1: Connection
Connect the Modbus cable according to the connection diagram in chapter 4.2.3. Please also note the versions in the interface definition Mod-
bus (RS485).
COM COM N/O
Relay 1
Relay 2
B
A Gnd
RS 485
N/O
N/O COM N/O
Relay 3
Relay 4
COM
Step 2: Programming
The SIRAX BM1450 is programmed via the Modbus RTU interface. Please refer to the detailed Modbus descriptions in chapter 10. The power
supply must be connected to the SIRAX BM1450 before it can be programmed.