User guide

PS100, CH100 & BPE-ALK Power

Supplies

Please refer to the relevant instruction manual for further information on the use of these

power supplies with specific Campbell Scientific equipment. Details of our intelligent

PS200/CH200 Charging Regulators are described in a separate manual.

1. Introduction

The PS100 is a 12-volt power supply that includes a charging regulator and a

7 amp hour battery. The CH100 is a charging regulator that is used with larger

Campbell Scientific battery packs such as the BP12, BP17 or BP24 or with a user-

supplied battery. Charging power is typically supplied by an AC transformer or

an unregulated solar panel.

The PS100 and CH100 each have one adapter connector that will allow

connecting one of the following adapters.

The A100 Null Modem Adapter has two 9-pin connectors that provide a null

modem for use in a site, without a datalogger. The A100 connects and powers

two Campbell Scientific peripherals that would normally be connected to a

datalogger. These peripherals are typically modems linking different

communications technologies; e.g., telephone to radio. A PS100 sold fitted with a

A100 adaptor is sold as a PS100-A100.

The A105 Additional 12 V Terminals Adapter may be used to provide additional

12 V and ground terminals where the power supply is used to power several

devices.

To prevent people from getting burned, an ABS plastic cover [CSI

#18688] sits on the heatsink of a PS100 or CH100. The cover is

fastened to the heatsink via a #4-40 x .250 Pan Phillips screw

[#395]. The cover must be removed to attach an A100 or A105

adapter. Some early models of the PS100 and CH100 did not

include the cover and do not have a place to attach it.

A number of Power Supply options are available with either alkaline or lead-acid

batteries. A unit that has the suffix -ALK to denote the battery type is a non-

rechargeable alkaline supply.

2. BPE-ALK Alkaline Power Supply

The BPE-ALK has eight alkaline D-cells mounted in a simple carrier. The

BPE-ALK can also be used with a lead-acid battery connected in parallel to the

datalogger; in this case the alkaline batteries act as a backup. The BPE-ALK

incorporates a low voltage drop diode which prevents any paralleled battery

discharging into the alkaline batteries.

NOTE