56
ie-ms2-MS6-10
Input configured for measurement of binary events works the way, during measurement internal source
2.5V with internal resistance of approx. 3000 Ohms is connected to the IN terminal IN. Input signal is
connected between terminals IN and COM. Signal can be from potential-less contact, open collector or
voltage. With voltage signal it it necessary to ensure, level L (zero voltage) is hard enough against this
internal source. If output of connected device is at high impedance state, data logger evaluates the state as
„H“.
Input for monitoring of binary event
Input levels for „L“ state:
input voltage (IN
–
COM)
<0,8 V (Rin < 1 k
resistance of closed contact (IN
–
COM)
< 1000
Input levels for „H“ state:
input voltage (IN
–
COM)
> 2 V
resistance of opened contact (IN
–
COM)
> 10 k
Minimum length of input pulse:
200 ms
Galvanically isolated input for transmitters with serial output RS485 (optional accessories)
This input is designed for reading from intelligent transmitters, supporting basic form of protocol ModBus
RTU or ADVANTECH. Transmitters are connected to special
terminals next to terminals for channel
15 and channel 16. User can specify, which channels will read values from this interface instead of
standard measurement. This input can cooperate with 1 up to 16 devices (resp. measured points).
Module works that way, command for reading of data from the first transmitter is sent, then it
waits for the response. Maximum waiting time is possible to set to approximately 210 ms. After
waiting time error of communication is reported and reading of next channel continues. If device
responses in adjusted time, response is evaluated and also reading of next channel continues. For
all channels evaluated from this input communication speed and protocol must be the same.
Input communication interface:
RS485
Address of input device:
must be from interval 1 to 247 (decimal)
Communication speed:
(1200, 2400, 4800, 9600, 19200, 57600, 115200) Bd
Parity:
1 stop bit with odd/even parity, 1 stop bit without parity, 2 stop bits
without parity
Transfer protocol:
ModBus RTU, Advantech
Impedance of input (reception):
approximately 12 k Ohms
Maximum length of cable:
1200 m at indoor rooms
Galvanic isolated:
500 V, not designed for safety function
Auxiliary power source:
approx. 24V/400mA max., galvanic connected with data logger
Note: for more information see Appendix No
.
2.
Copyright: COMET System, Ltd. It is prohibited to copy and edit this instruction manual and make any
changes at all without explicit agreement of COMET System, Ltd. All rights reserved.
COMET System, Ltd makes constant development and improvement of all its products. That is why it
reserves the right to make any technical changes on the device/product without previous notice.