Yokogawa DR240 - Manual (Page 273)

14-28 IM DR232-01E
DI: Remote control of recorder functions
Function
The following functions can be controlled by contact input:
- alarm acknowledge;
- alarm reset;
- timer reset;
- starting/stopping recording;
- manual printout;
- digital printout;
- message printout;
- message display;
- changing chart speed/recording interval;
- group trend recording;
- Starting/stopping/clearing/resetting computation;
- Saving/reading measured/computed data, reading set-up data.
Input signal
No voltage contact, open-collector driven by a TTL or transistor
Rated voltage:0 to 5 V DC (input impedance:4.7k
Ω, 5 V DC pull up)
Maximum input voltage (allowable range)
–2 to 7 V DC
Input conditions
• ON voltage:0.5V max. (30mA DC)
• Leakage current at OFF state:0.25mA max.
Duration of input signal
one second or longer (input signal detection internal:approx. 0.5 seconds)
14.9 DI/DO Module