Single-channel analog output for SIMATIC SC racks
The 6ES7124-1GA00-0AB0 is a SIMATIC SC electronic submodule carrying one analog output channel configurable for 0 to 20 mA or 4 to 20 mA current loops. It occupies two slots from a maximum of eight in the rack, so plan the I/O count around that footprint. Rated supply is 24 V DC, drawing up to 50 mA from the L+ rail, with reverse polarity protection on the input side.
Load drive and wiring constraints
Maximum load resistance is 600 Ω at 0 V common-mode voltage, dropping to 500 Ω at 2 V common-mode — the lower figure governs if the field wiring shares a return with other loops. The output handles inductive loads up to 1 mH and capacitive loads with a 0.5 ms time constant for inductive, 0.1 ms for resistive. No-load voltage at the current output terminals reaches 16 V max; the output can drive a two-wire transmitter connection directly.
Accuracy and resolution for loop tuning
Resolution is 12 bits in S5 representation or the full S7 range for 0-20 mA / 4-20 mA, with a conversion time of 5 ms per channel. Repeat accuracy at 25 °C is ±0.1 % of output range, linearity error ±0.06 %, and temperature drift ±0.01 %/K — tight enough for most process loops but not precision metrology. Common-mode rejection is 30 dB minimum at 50 Hz; the channel-to-backplane isolation uses an optocoupler, tested at 1500 V AC.
Panel fit and terminal block
Dimensions are 20 mm wide, 64 mm high, 51 mm deep — it fits a standard SIMATIC SC slot without overhang.