Recent content by sye15929

hi danw...thanks for the reply. i hv an input card but i do not know the ai impedance. how can i find out? measuring across the ai gives me reading in terms of Mohms (without my 500ohm resistor in parallel to the ai). also i have a sensor which states that the MAX loop resistance is 500 ohms...

hi danw... thanks for the reply. attached is a

hi! would like to get inputs on how to determine what load an analog sensor output can power. take for example a 4 to 20 ma output from the sensor to an analog card which reads only V (so we put a 500 ohm resistor across the input card). what are the parameters should i look for? anybody got a...

thanks all for the replies. i have been assigned a subnet and gateway add but the gateway add is different. it's just my curiosity why how a different gateway comes about. is it because different switches? different router (think this is the case??)? btw, my system doesn't work if devices...

Thanks IRstuff.... what i don't get is i have a site where i am have been given an ip for a new device to put in. its within the same building with same subnet as some devices i already have installed in that building and i would think same isp but different gateway from the existing gateway...

hi! i am not conversant at all in this area but need some info. basic idea at least. been looking at the internet but got no ideas at all from the diagrams shown. in point form, my questions are: 1. lets say between campus a and campus b, which are in different districts, can they share same...

thank bacneted ....will post once i go to site again soon.

Hi! Anybody got experience with this? Tried connecting this to our BMS but not able to read the objects such as BO,AI, AO. Able to read the gateway device properties only (such as object name, firmware revision). Not too sure if I am reading the manual (as attached) correctly such as: On/Off...

hi chasbean1! ya...same pumps (from what i remember) but slightly different head as one is serves as air cooled chiller and one a water cooled chiller (head difference only thru different chiller)...

hi jkauwale! thanks for the reply. i m closing some but not all the 3 way valves. will maintain enough 3 way valves just enough to maintain minimum flow. hope this makes sense.

hi all, thanks everyone for the reply and inputs.... what i am trying to do here is to imitate a vpf scheme with minimum modification or cost to the existing installation. instead of by-pass line with control valve, i am leaving some of the existing 3 way valve at the ahus open, some close to...

hi! need help to see if this strategy makes sense. existing installation is 1 centrifugal chiller and 1 air cooled chiller. no secondary loop (only primary). supply to few ahu pneumatically controlled with 3 way valves (can isolate bypass side). going to shut-off some of the bypass side for the...

thanks all! makes sense to me now.

ya.. here's the link http://pmac.com.cn/Products_show.asp?lan=zh-en&skin=2&newsid=125948036

what would be the right fuse election for an electrical meter with the following parameters- power supply input - 230 vac power loss <2VA overload: continuous overload -1.2 times of meter rated value, instant overload -instant current 10times/second, maximum voltage-600V (p-p) relay...