Visualization: The front panel displays a green LED, which stays on when there are no errors, turns off when there are errors, and flashes when there is a delay in release.
Channel clearing output: The collector/emitter segment of optocoupler isolation, channel 1 corresponds to z26 (collector)/z28 (emitter) for C1C/C1E, and channel 2 corresponds to z30 (collector)/z32 (emitter) for C2C/C2E. When externally disabled, in an error state, or with a release delay, C-E is disabled with a maximum allowable voltage of 48V; when not externally disabled, in an OK state, and without a release delay, C-E conducts with a maximum allowable current of 100mA.
Input external disable ES: corresponding to z22, used to disable limit alarm (such as during maintenance). Input LOW (0...+3V) to disable channel monitoring and limit formation, input HIGH (13... 48V) or enable if not switched.

Limit formation and alarm
Basic settings: Two alarm channels, each with an alarm output ALERT and DANGER, can be individually set with limit values. When the characteristic value exceeds the parameterized limit value (actual value>limit value), an alarm will be triggered.
Limit setting: Through parameter settings, it depends on the measurement operation, characteristic value formation, range, and other configurations. ALERT limit<DANGER limit, set range 0... 100% parameterized measurement range, resolution and reproducibility of 1% (based on full measurement range), configurable lag (0... 20% based on full measurement range, only valid when actual value drops).
Alarm delay: configurable to 0 (off), 1, 2, 3, 4, 5 seconds, effective for alarm output.
Alarm blocking: When C&P is activated, voltage or watchdog is not OK, external is disabled, channel status is incorrect and limit suppression is enabled, channel status release is delayed and channel monitoring is active, the alarm is blocked; Otherwise, do not block (* Determine whether to block the alarm output through channel monitoring in the configuration).
Alarm visualization: Each channel has a red LED, which will turn off when the infinite value is exceeded or the alarm is blocked; When ALERT alarm (no DANGER) occurs, the LED flashes at 2Hz (pulse/pause 1:1); The LED stays on when DANGER alarms.
Alarm output: collector/emitter segment isolated by optocoupler, Alert channel 1 A1-C/A1-E corresponds to b26 (collector)/b28 (emitter), Danger channel 1 D1-C/D1-E corresponds to d26 (collector)/d28 (emitter), Alert channel 2 A2-C/A2-E corresponds to b30 (collector)/b32 (emitter). When C-E is disabled, the maximum allowable UCE is 48V. When C-E is conductive, the maximum allowable ICE is 100mA. The alarm state is open circuit mode conductive, and closed circuit mode disabled.
Open/Closed Circuit Mode: Switch between digital inputs SC-A and SC-D through external signal selection. ALERT switching: d24-SC-A=HIGH/unconnected for open circuit mode,=LOW for closed circuit mode; DANGER switching: z24-SC-D=HIGH/unconnected for open circuit mode,=LOW for closed circuit mode. Switch level LOW=0...+3V, HIGH=13... 48V, input resistance>10k Ω.
communication interface
RS 232 interface: front panel socket, used for connecting laptops/computers for configuration and visualization, front panel circular plug connector is a mini DIN socket type TM 0508A/6, used for parametric cables (included in the operating kit).
RS 485 interface: d4, z4 bus interface, used for communication with MMS 68xx epro analysis and diagnostic system and configuration software.
Power supply
Power supply voltage input: Two redundant diode decoupled inputs, nominal+24V, shared 0V reference. Voltage input UB+/UN+corresponds to d2/z2, common reference 0V U - corresponds to b2. The allowable voltage range is 19... 31.2VDC (IEC 654-2 class DC 4), CSA requires 24Vdc; SELV LPS。 The maximum power consumption is 6W, and the maximum is 250mA at 24V.
Monitoring system voltage: The monitoring system voltage required for internal power supply continuously monitors undervoltage and generates an error message when undervoltage is detected.
Sensor power supply: The sensor power supply for two channels is diagonally separated from the supply voltage and can operate in parallel with other monitors. It is resistant to open and short circuits and has no response. Sensor power channel 1 is SENS1-/SENS1+corresponding to b6/z6, and channel 2 is SENS2-/SENS2+corresponding to b8/d6. Supply voltage 2
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