ZIROX SGM7, Manual

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Oxygen Monitor SGM7 5 Technical data
HB_SGM7_eng.docx
13
Data bits ........................................ 8
Parity ............................................. None
Handshake .................................... None
Pin assignment connector SUB-D 9-pol. F:
Chart 1: Serial interface protocol (CR = Carriage Return)
Command Display Description
M2CR M2x.xxExxCR Oxygen concentration in ppm
A1CR A1xxxCR Cell voltage in mV
A2CR A2xxxCR Measuring cell temperature in °C
Chart 2: Error indication
Error code Description
Error0 Transmission error
Error1 Warm up
Error2 Cell temperature too low
Error3 Thermocouple defective
Error6 System error
Analog output
Current signal ......................... 0/4 - 20 mA, potential-free, range adjustable,
apparent Ohmic resistance max. 500 Ohm
Alternative voltage signal ........ 0/2 - 10V (on request), potential-free,
range adjustable
Chart 3: Pin assignment for 4-pol. socket
Pin Description
1 I
out
– (optional U
out
– )
2 I
out
+ (optional U
out
+ )
3 Alarm relay (potential-free contact)
4 Alarm relay (potential-free contact)
Chart 4:
Limit value relay
Charge
Resistive charge (cos ϕ = 1)
Max. switching voltage 125 V AC, 60 V DC
Max. switching current 1A
Max. switching power 62.5 VA, 30 W
Min. permissible charge 1 mA at 5 V DC
MD
TXD
RXD