Performance Characteristics - Endress+Hauser Memograph M RSG40 Technical Information

Reference operating
conditions
Maximum measured error
Temperature drift
Long-term drift
10
Ethernet interface (interface slot, optional):
An IEEE 802.3-compatible connection is available on a shielded RJ45 plug connector on the rear of the device
as the network connection. This can be used to connect the device with a hub or switch to devices in an office
environment. For safe spacing distances, the office equipment standard EN 60950 must be observed. The
assignment corresponds to a standards-compliant MDI port (AT&T258) such that a shielded 1:1 cable with a
maximum length of 100 meters (328 ft) can be used here. The Ethernet port is designed as 10/100-BASE-T.
Direct connection to a PC is possible with a crossover cable. Half-duplex and full-duplex data transfer is
supported.
The device can be used in the network as a "Web server". Two Ethernet function LEDs on the rear of the
device.
Serial RS232/RS485 interface (interface slot, optional):
A combined RS232/RS485 connection is available on a shielded SUB D9 socket at the rear of the device. This
can be used for data or program transfer, to connect an RS232 barcode reader or as a modem connection. For
communication via modem, we recommend an industrial modem with a watchdog function. The Modbus
protocol (master and slave) is available. RTU (remote terminal unit) is used as the transmission mode.
The following baudrates are supported: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
Max. line length with shielded cable: 2 m (6.6 ft) (RS232) or 1000 m (3281 ft) (RS485)
Both interfaces are galvanically isolated from the system.
The RS232/RS485 interfaces cannot be used simultaneously.
Remote interrogation with analog or GSM wireless modem:
• Analog modem:
An analog modem (e.g. Devolo MicroLink 56ki or WESTERMO), which is connected to the RS232 interface
with a special modem cable (see Accessories), is recommended for industry.
• GSM wireless modem:
A GSM wireless modem (e.g. Siemens TC35i, incl. antenna and power unit), which is connected to the
RS232 interface with a special modem cable (see Accessories), is recommended. Important: The wireless
modem needs a SIM card and data transfer subscription. In addition, it must be possible to deactivate the
PIN prompt.
Bus interface (interface slot, optional)
• PROFIBUS-DP slave:
The device can be integrated into a fieldbus system as per the PROFIBUS-DP standard by means of the
PROFIBUS-DP interface. Up to 40 analog inputs and 14 digital inputs can be transmitted via PROFIBUS-DP
and stored in the device. For bidirectional communication in cyclic data transfer.
Baudrate: maximum 12 Mbit/s
• Modbus RTU slave:
Up to 40 analog inputs and 14 digital inputs can be transmitted via Modbus and stored in the device.
• Ethernet Modbus TCP slave:
Connection to SCADA systems (Modbus master). Up to 40 analog inputs and 14 digital inputs can be
transmitted via Modbus and stored in the device.

Performance characteristics

Ambient temperature: 25 °C ± 5 K (77 °F ± 9 °F)
Air humidity: 55 % ± 10 % r.h.
(See Input)
Cu100, Cu50 and Pt50: max. ± 0.02 %/K (of measuring range)
All other ranges: max. ± 0.01 %/K (of measuring range)
To IEC 61298-2: max. ± 0.01 %/month (of measuring range)
Memograph M
Endress+Hauser